ISO-120 Isolation Transformer 120V to 120V 1:1
The ISO-120 supplies 120V to 120V while separating the output from the mains electrically, wound and 100% tested in our own factory in Yueqing, China. It…
- Factory-direct pricing, no middleman markup
- Custom voltage, capacity and branding (OEM)
- MOQ from 10 pcs, production 15–25 days
- 12-month warranty with reliable support
The ISO-120 supplies 120V to 120V while separating the output from the mains electrically, wound and 100% tested in our own factory in Yueqing, China. It is the answer for 120V markets where sensitive equipment suffers from ground loops, hum, or common-mode noise, common in North America, Japan, and parts of South America and the Caribbean.
Key Specifications
| Specification | Value |
|---|---|
| Input Voltage | 120V AC |
| Output Voltage | 120V AC (1:1) |
| Capacity | 500VA / 1000VA / 2000VA / 3000VA / 5000VA |
| Frequency | 50Hz / 60Hz |
| Winding Type | Copper, fully separate primary and secondary |
| Isolation Rating | Galvanic isolation, no conductive path between input and output |
| Electrostatic Shield | Yes (screened primary, reduces common-mode noise) |
| Protection | Thermal cut-out + fuse |
| Warranty | 12 months, replacement-first |
What You Get
- True 1:1 isolation transformer with fully separate windings, not an autotransformer
- Galvanic isolation that breaks ground loops and blocks DC and common-mode noise
- Screened primary for lower noise on sensitive equipment
- Copper windings, varnish-dipped for moisture resistance
- Batch test certificate with every order, load-tested before packing
Why Choose This Model
A 120V to 120V isolation transformer looks like it does nothing, because the voltage is unchanged. The value is in the separation: the input and output share no conductive path, so ground loops, common-mode noise, and transients from the mains cannot reach your equipment the same way. For a recording studio, a laboratory, a dental practice, or a data rack in a 120V country, the isolation is the feature, and the voltage staying the same is expected.
Typical Applications
- Audio and studio equipment where ground-loop hum must be eliminated
- Laboratory and test equipment that needs a clean supply
- Medical and dental equipment requiring isolation from the mains
- CNC machines and PLC panels in industrial cabinets
- Home theater and sensitive electronics in 120V markets
Factory-direct isolation transformers, wound and 100% tested in Yueqing, China. MOQ 10 pcs, lead time 15-25 days, FOB Ningbo or Shanghai.
More from This Range
ISO-240 Isolation Transformer 240V to 240VSame-voltage isolation for 240V markets
ISO-115 Audio Isolation TransformerNoise-free supply for audio gear
ISO-500 1:1 Isolation Transformer 500VACompact isolation for test and audio use
Three Phase Isolation Transformer5kVA to 200kVA with electrostatic screen
FAQ
What is a 120V to 120V isolation transformer used for?
It supplies the same voltage while separating the input from the output electrically, breaking ground loops and blocking noise. Used in audio, lab, medical and industrial applications.
Is this an autotransformer?
No. The primary and secondary are fully separate windings, so there is no conductive path between input and output. That is what makes it an isolation transformer.
What size do I need?
Add up the wattage of everything you run at the same time and add 30% headroom. A 500VA unit covers small electronics, 2000VA covers studio gear, 5000VA covers industrial loads.
Do you ship to the US and Japan?
Yes. We ship worldwide, and 120V models are configured with the input plug for your market. MOQ is 10 pieces, lead time 15-25 days.