Pure Copper Winding Custom Toroidal Transformer For Audio And Medical Equipment
This custom toroidal power transformer is engineered for equipment that demands clean, stable and quiet power. Built with a continuously wound low-loss silicon steel toroidal core and 100% pure copper windings, it delivers high efficiency, low no-load loss, extremely low stray magnetic field and near-silent operation compared with conventional EI laminated transformers.
The unit shown is configured as Input 240V AC 50Hz / Output 30.0V AC 0.2A + 30.0V AC 0.2A (dual secondary). Input voltage, output voltage, VA rating, lead length and terminal type are all fully customizable to your drawing or specification. OEM & ODM orders are welcome, with samples available before mass production.
- Pure copper coil, voltage fully customizable – enameled copper wire only (no CCA), giving lower resistance, cooler running temperature and longer service life. Primary and secondary voltages are wound to your requirement.
- Stable output voltage under load, minimal voltage drop – tight coupling and optimized turns ratio keep the output steady from no-load to full-load, protecting sensitive downstream circuits.
- Multi-colored outgoing wires – each winding uses a different lead colour so primary, secondary and multiple windings can be identified instantly, reducing wiring errors and assembly time.
- Low noise & low EMI – the closed toroidal magnetic path suppresses mechanical hum and radiated magnetic flux, ideal for audio and precision measurement applications.
- Compact and lightweight – toroidal construction typically saves up to 50% of the volume and weight of an equivalent EI transformer, and mounts with a single centre bolt.
- Safety-oriented construction – flame-retardant insulation tape, layer-to-layer insulation between primary and secondary, and optional thermal fuse / thermal protector.
| Product Name | Custom Toroidal Transformer / Low Frequency Power Transformer |
|---|---|
| Core Type | Toroidal (continuously wound silicon steel strip core) |
| Winding Material | 100% pure enameled copper wire |
| Input Voltage | 240V AC (110V / 115V / 120V / 220V / 230V / dual primary available) |
| Output Voltage | 30.0V AC + 30.0V AC (dual secondary) – customizable |
| Output Current | 0.2A per secondary winding – customizable |
| Operating Frequency | 50Hz / 60Hz |
| Power Rating | Sample unit approx. 12VA; 3VA – 3000VA available on request |
| Insulation Class | Class B (130°C) standard, Class F (155°C) / Class H optional |
| Lead Wires | Multi-colour flexible lead wires, length and stripping customizable |
| Mounting | Centre-bolt mounting with metal washers and rubber pads (kit optional) |
| Optional Protection | Thermal fuse / thermal cut-off, electrostatic shield, epoxy coating |
| Customization | OEM & ODM, build to drawing / sample / electrical specification |
*Ratings above describe the sample configuration in the photo. Please confirm final parameters with our engineers before ordering.
| Audio Equipment | Hi-Fi amplifiers, power amps, mixing consoles, studio gear |
|---|---|
| Medical Devices | Patient monitors, diagnostic and imaging equipment power supplies |
| Industrial Automation | Control cabinets, robots, PLC and servo control power |
| Laboratory Equipment | Analysers, test benches, precision instruments |
| UPS & Power Systems | Uninterruptible power supplies, inverters, isolation power units |
| Instrumentation | Meters, controllers, signal acquisition and display devices |
- Experienced magnetic component manufacturer with in-house winding, assembly and testing.
- Engineering support: free electrical design proposal based on your circuit requirements.
- 100% electrical testing before shipment – turns ratio, no-load current, hi-pot and insulation resistance.
- Flexible order quantities, fast sampling and stable mass-production lead time.
- Export packaging with anti-shock foam / carton partitions to protect windings in transit.
- Sample: available for evaluation before mass production
- Sample lead time: approx. 7–10 working days after specification confirmation
- Mass production lead time: approx. 15–25 days depending on quantity
- Trade terms: EXW / FOB / CIF
- Payment: T/T, L/C, Trade Assurance (negotiable)
Yes. Send us your input/output voltage, current or VA rating, frequency, dimension limit and lead requirements, and our engineers will provide a design proposal and quotation.
Higher efficiency, lower no-load loss, much lower audible hum and stray magnetic field, plus smaller size and lighter weight for the same power rating.
Please tell us your target market and applicable standard; we will confirm the available certification and test reports for your specific model.
Yes, trial quantities are accepted so you can validate performance in your own equipment first.
Need a transformer for your project? Send us your specification or drawing today and receive a technical proposal and quotation within 24 hours.
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Have questions about our products or want to discuss a custom order? Our team is ready to help you.