# Efficient Toroidal Coil Corporation

Manufacturer in Pune, Maharashtra. Last updated 2026-10-11; site last checked 2026-10-11. Gathered from the business's own website. **Not verified by the business.**

Pune-based manufacturer of custom electromagnetic components: toroidal transformers, current transformers, potentiometers, wire wound resistors and rheostats. It supplies defence, aerospace, industrial, medical and automotive OEMs, and has operated since 1994.

## How to reach this business

- No email address, web form or portal is listed for this business. The listed routes (phone, phone) need a person.
- Note: Both standard catalogue items and fully custom builds to a customer drawing are offered. Prototype quantities are accepted with no minimum run.
- Include in your first message: Specification or drawing; Power rating (VA) or current rating; Frequency and voltage (primary and secondary); Quantity; Termination and enclosure requirements
- Typical way to start: request quote

_A way to send an enquiry through this directory is planned. Until then, use the routes above._

## At a glance

| | |
| --- | --- |
| Website | https://etccindia.com |
| Established | 1994 |
| Service area | OEMs across India and globally |
| Languages | en |
| Factory | Unit No. 11, Electronic Sadan No.-1, M.I.D.C., Bhosari, Pune, Pimpri-Chinchwad, Maharashtra 411026, India |

## What they offer

### Current transformers, potentiometers, wire wound resistors and rheostats (product)

Further product lines made in-house at the Pune facility.

- Current transformers 50A–2000A, accuracy class 0.5
- Servo potentiometers ±0.5% linearity, −55°C to +125°C
- Linear potentiometers (slide-wire and linear motion types)
- Wire wound resistors 5W–200W, ceramic and aluminium housed
- Rheostats, rotary and slider types, 25W–500W

### Custom toroidal transformers (custom production)

Toroidal transformers wound to customer specification, 10VA to 3000VA, 50Hz to 10kHz, including 400Hz defence-grade designs.

- Minimum order: Small quantities accepted — no minimum run required

**Options**
- Core: CRGO silicon steel, ferrite, nanocrystalline
- Insulation Class F (155°C) through H (180°C), up to 200°C
- Single, dual, centre-tapped or 12+ multi-tap secondaries
- Electrostatic shield, thermal fuse or switch
- Termination: flying leads, PCB pins, screw terminals, bolt mount
- Enclosure: open wound, varnish impregnated, epoxy potted, IP-rated
- Regulation down to 1%
- Custom lead colours and lengths
- Prototype to production, no minimum run

## More about this business

**Products**
- Toroidal transformers 10VA–3000VA, 50Hz to 10kHz
- Current transformers 50A–2000A, accuracy class 0.5
- Linear and servo potentiometers
- Wire wound resistors 5W–200W
- Rheostats 25W–500W

**Quality**
- Every unit is individually tested, not sampled
- Full lot traceability from raw material to dispatch
- Standard toroidal units are tested to IEC 61558 / IS 2026

**Industries**
- Defence, aerospace, industrial, medical, automotive
- Components supplied for platforms including the Su-30MKI, Tejas LCA and naval electronic systems

**Other**
- Founded 1994 by Mr. Rajan Naroor
- Customer visits and audits are welcome at the factory
- Serves OEMs across India and globally

## Sources

- https://etccindia.com/ (fetched 2026-10-11)
- https://etccindia.com/about-us (fetched 2026-10-11)
- https://etccindia.com/toroidal-transformer (fetched 2026-10-11)