Toriodal Transformer
- Unique closed magnetic circuit design
- High efficiency, low energy consumption
- Compact size, lightweight, low noise, low vibration
- Low temperature rise, long service life
- Certified with UL/CB/CE/ERP/RoHS/REACH/GS/SAA
- Fast delivery time, 5-7 days for sample orders
- Professional ODM/OEM capabilities
Power Supply Supplier & Manufacturer
Relipower is a professional power supply manufacturer in China since 1995. We specialize in wholesale production for global brands and distributors. Our product range includes toriodal transformer, din-rail power supply, led driver, power module and universal power supply. All products are certified by UL/CE/UKCA/ROHS/GS standards, OEM/ODM available.
We integrate design, R&D, production and global sales in-house. Serving customers in 50+ countries, we deliver quality power supply solutions for industrial equipment, medical equipment, led lighting, telecom projects and commercial spaces. Our commitment: reliable manufacturing and on-time delivery.
What is a
toroidal transformer?
A toroidal transformer is a type of electrical transformer constructed with a torus or donut-shaped core, which is widely used in isolation equipment for the medical industry，industrial control equipment, and automotive electronics in China, among other applications.
Relipower supplies custom toroidal transformers ranging from 50 VA to 5000 VA, featuring a single primary voltage of 110V/120V/220V/230V/240V AC 50/60Hz and a single or double secondary voltage of 12V/24V. Whether you need a specific size, power rating, or have special manufacturing requirements, we can provide customized toroidal transformer solutions tailored to your needs.
Why Choose Toroidal Transformer？
Ultra-Low Noise & EMI
Uniform core winding virtually eliminates stray magnetic fields and audible hum. Ideal for medical equipment, audio systems, and sensitive instrumentation where electromagnetic interference cannot be tolerated.
High Efficiency, Low Heat
Operates 10-15°C cooler than equivalent EI transformers due to shorter copper paths and optimized thermal design. Reduced heat generation extends component lifespan and lowers cooling system requirements.
Compact & Light weight Design
Delivers the same power output in 50% less volume and weight compared to standard transformers. Perfect for space-constrained applications like industrial automation, railway systems, and portable equipment.
Superior Power Density
High power-to-weight ratio maximizes performance with minimal footprint. Reduced copper and core material usage cuts resistive losses by up to 30%, lowering energy consumption and operating costs.
Fast, Flexible Installation
Center-bolt mounting enables quick installation and equipment integration. Custom winding configurations accommodate diverse voltage requirements without tooling changes or compatibility issues.
Lower Total Cost of Ownership
Up to 95% material utilization efficiency reduces raw material costs. Lower energy losses, extended service life, and minimal maintenance deliver measurable ROI for high-volume OEM and industrial buyers.
Toroidal Transformers for Power Applications
Toroidal transformers deliver efficient, reliable power conversion across industries where performance and space matter. Their compact design and low EMI make them ideal for demanding OEM applications.
Marine & Offshore Systems
Powers shipboard navigation, communication, and control systems in corrosive saltwater environments. Vibration-resistant construction ensures continuous operation during rough seas and extended voyages.
UPS & Battery Backup Systems
Provides efficient voltage conversion for uninterruptible power supplies protecting critical data and telecom infrastructure. Low idle losses extend battery runtime while compact size fits standard rack enclosures.
Power Transmission & Distribution
Steps down high-voltage lines for safe distribution to substations and industrial facilities. High efficiency reduces transmission losses, supporting grid reliability and energy cost savings.
Audio & Professional Sound Equipment
Delivers noise-free power to amplifiers, mixers, and studio equipment without introducing hum or distortion. Preferred by audio professionals for recording studios, concert venues, and broadcast facilities.
Industrial Automation & Control Panels
Isolates and regulates power for PLCs, motor drives, and robotics in manufacturing environments. Custom voltage configurations and compact mounting simplify integration into control panels.
Medical & Laboratory Equipment
Ensures stable, interference-free power for diagnostic devices, patient monitors, and precision instruments. Meets IEC 60601 medical safety standards for patient-connected applications.
Wholesale Toroidal Transformer by Types
We are a specialized toroidal transformer manufacturer, providing over 200 power transformer models for OEM and industrial applications worldwide. Our premium toroidal transformers are UL, CE, and RoHS certified.
Our toroidal transformer range covers power ratings from 15VA to 5000VA, available in single-phase and three-phase configurations with custom voltage options from 110V to 380V input, and secondary outputs tailored to your specifications.
- Core Materials: Silicon steel (M4, M5, M6), amorphous alloy, nanocrystalline cores optional for ultra-low losses;
- Power Ratings: 15VA, 30VA, 50VA, 80VA, 100VA, 120VA, 160VA, 200VA, 300VA, 500VA, 800VA, 1000VA, 1500VA, 2000VA, 3000VA, 5000VA optional;
- Core Diameters: 40mm, 50mm, 65mm, 80mm, 90mm, 105mm, 120mm, 130mm, 150mm, 180mm, 200mm, 220mm outer diameter optional;
- Insulation Classes: Class B (130°C), Class F (155°C), Class H (180°C) temperature ratings to match industrial and medical safety requirements.
- Every toroidal transformer features epoxy-sealed terminals and mounting brackets, ensuring straightforward installation and long-term reliability in demanding environments.
- Efficiency ratings: Up to 95% typical efficiency, low no-load losses under 2W for energy-saving compliance, ultra-low EMI with less than 5mG stray field at 5cm distance.
We have our own factory and engineering team. If you need custom voltage ratios, special mounting configurations, or specific certifications not in our standard catalog, we can design custom transformers tailored to your application. Our engineering team has extensive experience creating medical-grade (IEC 60601), industrial (IEC 61558), and marine-rated transformers to ensure compliance across global markets. Contact us to discuss your project requirements.
Toroidal Transformer 20-5000W
| Model | Power (max) | O.D | I.D | H | Weight | converntional base size | Mounting Hole distance | limit parameter Minimum height | Limit parameter Minimum diameter | MOQ | Certificate |
|---|---|---|---|---|---|---|---|---|---|---|---|
| RELI-20W | 20W | 75mm | 40mm | 35mm | 0.6kg | 70*70mm | 60*60mm | 18H*90mm | 68 O.D*35mm | 500 | UL,,CE,Rosh,CQC |
| RELI-30W | 30W | 80mm | 40mm | 35mm | 0.8kg | 80*80mm | 70*70mm | 20H*90mm | 70O.D*35mm | 500 | UL,,CE,Rosh,CQC |
| RELI-40W | 40W | 90mm | 42mm | 36mm | 1.0kg | 90*90mm | 78*78mm | 25H*90mm | 70O.D*35mm | 500 | UL,,CE,Rosh,CQC |
| RELI-50W | 50W | 90mm | 40mm | 36mm | 1.1kg | 90*90mm | 78*78mm | 500 | UL,,CE,Rosh,CQC | ||
| RELI-60W | 60W | 95mm | 42mm | 42mm | 1.2kg | 90*90mm | 80*80mm | 25H*95mm | 72O.D52mm | 500 | UL,,CE,Rosh,CQC |
| RELI-70W | 70W | 100mm | 44mm | 42mm | 1.4kg | 100*100mm | 90*90mm | 27H*100mm | 78O.D52mm | 500 | UL,,CE,Rosh,CQC |
| RELI-80W | 80W | 105mm | 44mm | 42mm | 1.6kg | 100*100mm | 90*90mm | 27H*100mm | 78O.D52mm | 500 | UL,,CE,Rosh,CQC |
| RELI-100W | 100W | 110mm | 45mm | 45mm | 1.6kg | 500 | UL,,CE,Rosh,CQC | ||||
| RELI-105W | 105W | 110mm | 46mm | 54mm | 1.6kg | 100*100mm | 90*90mm | 32H*116mm | 82O.D*52mm | 500 | UL,,CE,Rosh,CQC |
| RELI-120W | 120W | 115mm | 46mm | 55mm | 1.48kg | 100*100mm | 90*90mm | 32H*116mm | 82O.D*52mm | 500 | UL,,CE,Rosh,CQC |
| RELI-150W | 150W | 115mm | 56mm | 56mm | 2.5kg | 120*120mm | 110*110mm | 500 | UL,,CE,Rosh,CQC | ||
| RELI-160W | 160W | 110mm | 45mm | 45mm | 1.9kg | 120*120mm | 110*110mm | 32H*124mm | 92O.D*58mm | 500 | UL,,CE,Rosh,CQC |
| RELI-200W | 200W | 110mm | 46mm | 54mm | 2.3kg | 120*120mm | 110*110mm | 32H*134mm | 96O.D*58mm | 500 | UL,,CE,Rosh,CQC |
| RELI-260W | 260W | 115mm | 46mm | 55mm | 2.6kg | 120*120mm | 110*110mm | 35H*134mm | 98O.D*63mm | 500 | UL,,CE,Rosh,CQC |
| RELI-300W | 300W | 120mm | 46mm | 55mm | 2.9kg | 120*120mm | 110*110mm | 36H*147mm | 107O.D*63mm | 500 | UL,,CE,Rosh,CQC |
| RELI-360W | 360W | 125mm | 50mm | 63mm | 3.7kg | 120*120mm | 110*110mm | 40H*152mm | 113O.D*73mm | 500 | UL,,CE,Rosh,CQC |
| RELI-400W | 400W | 130mm | 50mm | 64mm | 4.1kg | 140*140mm | 130*130mm | 42H*160mm | 115O.D*78mm | 500 | UL,,CE,Rosh,CQC |
| RELI-500W | 500W | 135mm | 50mm | 65mm | 4.6kg | 140*140mm | 130*130mm | 46H*160mm | 120O.D*78mm | 500 | UL,,CE,Rosh,CQC |
| RELI-600W | 600W | 140mm | 42mm | 63mm | 5.2kg | 140*140mm | 130*130mm | 50H*170mm | 126O.D*78mm | 500 | UL,,CE,Rosh,CQC |
| RELI-700W | 700W | 145mm | 45mm | 66mm | 5.7kg | 140*140mm | 130*m130mm | 500 | UL,,CE,Rosh,CQC | ||
| RELI-800W | 800W | 157mm | 45mm | 67mm | 6.6kg | 160*160mm | 150*150mm | 52H*175mm | 135O.D*85mm | 500 | UL,,CE,Rosh,CQC |
| RELI-1000W | 1000W | 164mm | 52mm | 75mm | 8.2kg | 160*160mm | 150*150mm | 55H*190mm | 140O.D*92mm | 500 | UL,,CE,Rosh,CQC |
| RELI-1200W | 1200W | 178mm | 55mm | 80mm | 10.0kg | 180*180mm | 170*170mm 150*150mm ˫?? | 60H*210mm | 150O.D*92mm | 500 | UL,,CE,Rosh,CQC |
| RELI-1500W | 1500W | 190mm | 58mm | 80mm | 12.0kg | 180*180mm | 170*170mm 150*150mm ˫?? | 60H*220mm | 160O.D*95mm | 500 | UL,,CE,Rosh,CQC |
| RELI-2000W | 2000W | 200mm | 58mm | 85mm | 14.9kg | 200*200mm | 190*190mm 170*170mm ˫?? | 60H*235mm | 174O.D*100mm | 500 | UL,,CE,Rosh,CQC |
| RELI-2500W | 2500W | 220mm | 58mm | 85mm | 18.0kg | 220*220mm | 210*210mm 190*190mm ˫?? | 500 | UL,,CE,Rosh,CQC | ||
| RELI-3000W | 3000W | 230mm | 65mm | 90mm | 22.0kg | 220*220mm | 210*210mm 190*190mm ˫?? | 500 | UL,,CE,Rosh,CQC | ||
| RELI-4000W | 4000W | 245mm | 65mm | 95mm | 27.0kg | 240*240mm | 230*230mm 210*210mm ˫?? | 500 | UL,,CE,Rosh,CQC | ||
| RELI-5000W | 5000W | 255mm | 65mm | 100mm | 32.0kg | 240*240mm | 230*230mm 210*210mm ˫?? | 500 | UL,,CE,Rosh,CQC |
Product Video
How to Manufacture Toroidal Transformers?
Our toroidal transformers are precision-engineered through an 8-step manufacturing process, combining automated winding technology with skilled craftsmanship. Each unit undergoes rigorous testing to ensure reliable performance in demanding applications.
01
Core Preparation
Silicon steel cores are annealed and wrapped with polyester film insulation. Cores are precisely measured and secured on automated winding equipment for consistent tension control.
02
Primary Winding
Copper wire is threaded through the core center and wound uniformly around the inner bore. Automated winding machines ensure tight, non-overlapping turns with 1-3mm spacing between layers.
03
Secondary Winding
Secondary coils are wound using the same precision method as primary windings. Multiple taps or outputs are configured per customer specifications during this stage.
04
Insulation & Taping
Primary windings are secured with Mylar tape for electrical isolation. Polyester film layers provide additional protection between primary and secondary windings.
05
No-Load Testing
Every transformer undergoes electrical testing to verify voltage ratios, winding resistance, and insulation integrity. Units failing specifications are rejected at this stage.
06
Aging Testing
Undergoes a continuous 48-hour operational test in an aging chamber to verify its stable and reliable performance under fluctuating temperature and humidity conditions. Pass vibration and shock resistance tests.
07
Final Assembly & QC
Mounting hardware is installed, and units receive final inspection for mechanical defects. Each transformer is labeled with specifications and test data before packaging.
08
Packaging
Select corrugated boxes made from pressure-resistant and moisture-proof materials,
paired with custom inner liners such as foam or EPE to secure products, minimize movement, and significantly reduce damage rates.
How to Install Toriodal Transformer ？
Installing a toroidal transformer requires careful attention to safety protocols and proper connection procedures.
Follow these step-by-step instructions to ensure safe, reliable operation in your application.
Turn Off Main Power Supply
Safety first—always disconnect the main power supply before installation. Any voltage above 90V AC can cause serious injury or death. Verify power is off using a multimeter before proceeding.
Remove Existing Connections
If replacing an old transformer, disconnect all wiring from terminals. Use a flathead screwdriver to release spring-clip terminals or loosen screw terminals completely before removing the unit.
Ensure Adequate Ventilation
Mount the transformer in a location with sufficient airflow on all sides. Proper ventilation prevents overheating, ensuring maximum efficiency and extended service life—minimum 50mm clearance recommended.
Installation the DIN rail
For DIN rail mounting: Angle one end of the mounting clip onto the rail, then rotate downward until you hear a click. For bolt mounting: Use the center mounting bolt and rubber washers to secure the transformer firmly.
Connect Load Cables First
Start wiring from the load side (output), followed by AC input, then protective earth ground. Ensure all wires are fully inserted into terminal blocks to prevent loose connections and potential short circuits.
Verify Output Voltage
Some transformers feature DC voltage adjustment trimpots on the front panel. Always disconnect power before making adjustments to protect both equipment and personnel.
Establish Proper Ground Connection
Always install a three-prong grounded outlet for safety compliance. Proper grounding meets EMC standards, prevents electrical shock, and protects equipment from voltage surges.
Restore Power & Test Operation
Once all connections are secure, restore main power and monitor performance. Check output voltage, listen for abnormal noise, and verify the transformer runs cool. If issues arise, disconnect power immediately.
Need professional support?
Relipower provides installation guides, video tutorials, and customer service for OEM and bulk orders.
Our team helps distributors and contractors integrate power supply safely and efficiently.
Solution 1
Marine Power Systems
Description:
Modern ships rely on electric propulsion powered by gas turbines or diesel generators. From cargo vessels to cruise ships, propulsion systems demand reliable, isolated power delivery for navigation, maneuvering, and station-keeping operations.
Without isolation transformers, ship electrical systems connect directly to shore power grounding—creating dangerous fault current paths through the hull into the water. This poses serious safety risks for dockworkers and maintenance crews.
Isolation transformers break this direct ground connection. Power transfers through the transformer’s magnetic field, not a physical conductor. Shore power grounding connects only to the transformer shield, establishing a separate ground reference for the vessel. Fault currents cannot flow between shore and ship grounds.
Additional benefits include polarization protection. If shore power polarity reverses, isolation transformers prevent power switches from energizing grounded enclosures—avoiding equipment damage and electrical hazards. The magnetic core also shields against galvanic corrosion, protecting expensive zinc anodes and underwater metal components from premature erosion.
Every shore power distribution cabinet in marine applications requires an isolation transformer for safety and equipment protection.
Solution 2
UPS & Backup Power Systems
Description:
In transformer-based UPS systems, toroidal transformers step up inverter output voltage to match utility or generator supply levels. However, these transformers don’t provide galvanic isolation by default. For complete isolation, transformer-less UPS systems require an additional isolation transformer in the circuit to eliminate DC output components.
Transformers enable intelligent UPS management. By monitoring incoming power in real-time, transformer-based systems detect voltage anomalies and deviations that signal impending failures. This early fault detection enables preventive maintenance, reducing costly downtime in data centers and critical facilities.
Modern UPS control strategies leverage transformers for dynamic power allocation. By analyzing load demand, battery status, and environmental conditions, transformer-integrated systems optimize energy distribution automatically. This includes adjusting battery charging/discharging rates, balancing power sources efficiently, and ensuring seamless transitions between grid, generator, and battery power without interruption.
The result: Extended battery life, reduced energy waste, and maximum uptime for mission-critical operations.
Custom
Toridal Transformer
Customization for Color
Customization
for Voltage and Current
Customization
for Medical technology
Model No.
Tailor the specific size to fit your system, power rating, or special manufacturing requirement.
Phase
Choose suitable power supply requirement,equipment princeples,cost and efficiency.
Power
Select from 50 VA to 5000 VA (customized)
Primary Voltage
Available for voltage applied to the input winding (i.e., the primary winding 0 to 690V (customized)).
Secondary Voltage
The voltage induced in the output winding (i.e., the secondary winding 0V to 690V (customized))
Secondary Current
The current flowing from the output terminals of electrical equipment (especially transformer-type equipment) to the load.（i.e.3A to 200A)
No.of Inputs
1 input,Custom mounting and special enclosure requirements
Frequency
50Hz / 60Hz
Leakage current
Maximum enclosure leakage current.
Cable Specification
Special copper wire terminations/harness requirements.
Logo
Brand the unit with your company mark or custom panel for OEM/wholesale projects.
Why Wholesale Toroidal Transformers
in Bulk from us?
Relipower specializes in manufacturing and customizing high-quality power supply，inserts for global B2B clients. Our goal is simple — deliver products that combine reliable performance, modern aesthetics, and factory-direct pricing, helping your business scale with confidence.
Professional Manufacturing
With over 30 years of experience in power supply production, Relipower manages every step in-house — from Injection Molding and PCB processing to final assembly and testing. Each unit follows strict quality standards and international safety certifications for consistent performance.
OEM & ODM Customization
We provide full customization for logo, packaging, dimensions, voltage, and energy efficiency. Whether you’re a retailer, brand owner, or project contractor, our engineers help tailor designs that fit your exact market needs.
High-Flux Magnetic Core
Our high flux toroidal core combined with a unique edge chamfer design in China, providing you with excellent performance and efficiency. This iron core gives it excellent magnetic permeability, which can effectively conduct magnetic flux and reduce energy loss
Energy Efficiency & Safety
Every model is tested under full load to ensure stability, low power consumption, and safe operation. All units include built-in overheat protection, grounding, and temperature control systems.
Global Supply Capability
Relipower supports large-scale production and flexible order volumes with reliable export logistics to North America, Europe, and other major markets. We guarantee stable lead times and secure packaging for international shipping.
Marketing & Technical Support
Beyond manufacturing, our team provides product training, catalog materials, installation guidance, and marketing visuals to help distributors and partners succeed in local markets. We grow with your business, offering continuous after-sales and customization support.
Quality Control &
Testing Process
Every power supply is built under strict quality control standards.
We test every detail — from iron core and copper wire to poyester film and standard lead — to ensure reliability in long-term use. We deliver power supply that perform safely, look beautiful, and last for years.
Electrical & Safety Tests
All power supply go through high-voltage and grounding tests, power stability checks to guarantee safe daily use.
Material Inspection
Each batch of materials and electrical components is tested for strength, flatness, and insulation before entering production. Only qualified parts move forward.
Assembly Check
During production, our technicians inspect dimensions, wiring, and PCB modules in real time. Each unit must match design drawings with zero tolerance for defects.
Performance & Visual Check
We test every unit to confirm coils are uniform and winding, full-scale testing, and flawless glass surfaces — ensuring each product looks and performs perfectly.
Aging & Reliability Test
Finished units run continuously for 48 hours under load. This test ensures long-term durability and stable performance in all environments.
Final Inspection
Before packing, all models are checked against international standards and only qualified products are allowed to be packaged.
Our Certification
We always strive to provide our customers with the best possible customer experience when working with us. In addition to our excellent customer service, we want our customers to be confident that their toriodal transformer, Din rail power supply, Led driver are safe and of the highest quality. To ensure the best performance, all our toroidal transformer, Din-rail power supply, Led driver have passed UL CE, RoHS certificates.
Let’s Collaborate:
Receive a Custom Quote for Your Wholesale Business Now.
We specialise in high-performance toriodal transformer for wholesale and custom applications. Trusted by hundreds of businesses worldwide – we’re ready to help you bring premium solutions to your customers.
sales@relipowertech.com/ jacky.huang@relipower.com
+86 15858425818
2026v1
Complete Product Catalog
Access our full range of toroidal transformers from 15VA to 5000VA with detailed technical specifications, dimensional drawings, and voltage configurations. Get instant pricing for bulk orders and custom engineering support for your application.
2026v1
Custom Transformer Design Guide
Download our engineering guide covering custom winding configurations, core material selection, and thermal management strategies. Learn how to specify transformers for medical, industrial, and audio applications with compliance documentation included.
Get the Latest Product Insights
Trusted by hundreds of OEM manufacturers and system integrators worldwide—access technical resources, case studies, and custom solution examples to accelerate your product development.
Toroidal transformer vs. conventional transformer
Frequently Asked Questions
Welcome to Relipower’s FAQ Center. Here you’ll find answers to the most common business, technical, pre-sales, after-sales, and maintenance questions about our power supply .
Business & Trade FAQs
Q1: What is your minimum order quantity (MOQ)?
Usually 50 units. Sample orders and smaller trial batches are also available.
Q2: Do you support OEM / ODM servic
Yes. We offer custom logo printing, packaging design, control system modification, and exterior design customization.
Q3: What is the lead time?
Standard models: around 20 days.
Customized models: 45–60 days depending on complexity.
Q4: What payment methods do you accept?
T/T, wire transfer, and L/C are all accepted.
Q5: Are taxes or VAT included in the quotation?
Prices are usually quoted EXW or FOB without VAT; can be adjusted based on destination.
Q6: Can I get a sample before bulk order?
Yes. Sample fees can be refunded or deducted from your first bulk order.
Q7: Do your power supply have certifications?
Yes,UL, CE, UKCA, GS and ROHS certified — suitable for US, EU, UK and the Middle East.
Q8: Do you work with distributors or agents?
Yes. We welcome long-term cooperation with regional distributors.
Technical FAQs
Q1: How to wire toroidal transformer?
Built-in, wall-mounted, and freestanding styles. range from toriodal transformer to Din-rail power supply.
Q2: Identify the primary and secondary windings?
A toroidal transformer typically has two sets of windings—the primary winding and the secondary winding. The primary winding is usually designated for the input voltage, while the secondary winding is for the output voltage.
Q3: What is the voltage and current requirements:?
Before wiring the transformer, ensure that you have the necessary information about the voltage and current requirements of your application. This includes knowing the primary and secondary voltages, as well as the maximum current that will flow through the windings.
Q4: How to connect the primary winding:?
The primary winding is usually denoted by a pair of leads or wires. Connect the input voltage source (such as the mains power supply) to these leads. Take note of any polarity markings o
Q5: What primary winding tapping options are available?
Some toroidal transformers may have multiple taps on the primary winding, allowing you to select different input voltages. If your transformer has this feature, choose the appropriate tap based on your input voltage requirements. Connect the input voltage source to the selected tap.
Q6: How to connect the the secondary winding?
The secondary winding is typically denoted by another set of leads or wires. Connect your load or the circuit that requires the desired output voltage to these leads. Make sure to observe the correct polarity if specified by the manufacturer.
Q7: What materials are used for the fireplace inserts?
Once the primary and secondary windings are connected, it’s important to insulate and secure the connections properly. Use appropriate insulation materials, such as heat-shrink tubing or electrical tape, to cover any exposed conductors. Additionally, ensure that the connections are mechanically secure and won’t come loose during operation.
Q8: Is the wiring available?
Before powering up the transformer, double-check all the connections to ensure they are correctly wired according to the specifications and requirements of your application. This step is crucial for safety and to prevent damage to the transformer or connected devices.
Pre-Sales FAQs
Q1: How do I choose the specification?
Check your input voltage and current.
Q2: Can I purchase only the accessories?
Yes. accessories are available for replacement or power projects.
Q3: What shipping options do you offer?
Sea freight, air freight, express, and DDP door-to-door service. If you have shipping agents to help with delivery, it would be more convenient to arrange.
Q4: Can you provide installation drawings or manuals?
Yes. CAD drawings and PDF installation guides are available.
Q5: Are these power supply suitable for commercial use?
Yes. Perfect for audio technology , medical technology, or industrial control systems.
After-Sales FAQs
Q1: What is your warranty policy?
Standard 1-year warranty; can be extended to 2 years by agreement.
Q2: What does the warranty cover?
Plastic Housing, PCB, IC, LED lighting, and other non-human faults.
Q3: What should I do if the product is damaged or missing parts?
Please report within 7 days of receipt with photos or videos; we will send replacements promptly.
Q4: Do you offer technical support?
Yes. Product lable and manual guidance are available.
Q5: Are spare parts available?
Yes. Common parts (plastic housing, PCB, IC, electronic components, etc.) are always in stock.
Usage & Maintenance FAQs
Q1: Why do toroidal transformers hum?
Toroidal transformers can sometimes produce a humming sound due to several factors