Fan Regulator Types and How to Connect One
There are three fan regulator types you will meet in Indian homes: the old resistor step regulator, the electronic step regulator, and the modular electronic regulator that clips into a switch board. All of them control an ordinary ceiling fan by being wired in series with it, on the phase wire. We make electronic regulators in 4 step and 5 step versions under KEMPS, VIZA and VIYONA, so below are the types, the wiring and real MRPs from our catalogue.
Key takeaways
- Resistor step regulator — the old heavy, square type; turns surplus power into heat.
- Electronic regulator — compact, runs cool; what every regulator we make is.
- 4 step vs 5 step — the number of speeds between off and full. Five gives finer control.
- Connection — in series on the phase wire between the fan switch and the fan; neutral goes straight to the fan.
- ⚠ A light dimmer is not a fan regulator, and a BLDC fan may not need or accept one. Follow the fan maker’s instructions.
Fan regulator types: the short answer
A fan regulator controls the speed of a ceiling fan by reducing the power that reaches it. The old way did it with a resistor, which wastes the surplus as heat. The modern way does it electronically, which runs cool and wastes far less. Today you choose between a modular electronic regulator for a modular switch board and a plate type or surface electronic regulator for a conventional one.
Within those, the main choice is the number of steps: 4 or 5 speeds between off and full. After that it comes down to the range, so it matches the switches around it.
We manufacture electronic regulators in Mumbai under all three of our series: KEMPS and VIZA modular, and VIYONA plate type and surface. Every price below is from our current catalogue.
Resistor step regulators: the old type
The resistor regulator is the large, heavy square regulator found in older homes. Each step switches in a resistor coil that drops some of the voltage before it reaches the fan. The fan slows down, and the voltage dropped across the coil becomes heat. That is why these regulators run warm and why the plate around them discolours over the years.
At low speed, a resistor regulator saves little electricity: the power not used by the fan is burnt in the coil instead. It also needs a large box on the board. We do not make resistor regulators.
A regulator that is hot to touch, smells of burning or has a scorched plate should be switched off at the MCB and replaced by an electrician.
| Resistor step | Electronic regulator | Light dimmer | |
|---|---|---|---|
| How it slows the fan | Burns surplus power in a coil | Controls power electronically | Not designed for fans |
| Heat | Runs warm | Runs cool | Can overheat on a fan |
| Size | Large, needs a big box | 1M or 2M, or a small plate | 1M or 2M |
| Humming | Rare | Rare with a matched fan | Common on a fan |
| BLDC fans | No | Follow the fan maker | No |
| We make it | No | Yes, 4 and 5 step | Yes, for lights only |
Electronic fan regulators: what we make
An electronic regulator controls the power reaching the fan electronically instead of burning it off in a coil. It is compact, it runs cool, and it fits a single module or a small plate. Every regulator in our catalogue is electronic.
Our modular ones are the KEMPS K213 Tiny EME 4 step and K214 Duro EME 5 step, and the VIZA V1276 4 step and V1277 5 step, plus 1M and 2M Royal regulators. For conventional boards, VIYONA makes the mini 4 step, the medium 5 step and an ABS plate type 5 step regulator; see VIYONA electronic regulators and plate type regulators.
Compact, runs cool; every regulator we make.
Same top speed; five steps give finer low speeds.
Fan switch, then regulator, then fan. Neutral direct.
A light dimmer on a fan can hum and overheat.
4 step vs 5 step regulator
The step count is the number of fan speeds. A 4 step regulator gives four speeds plus off; a 5 step gives five. The top speed is the same, since both pass full power at the last step. Five steps simply split the range more finely, which helps in a bedroom where you want a very low speed at night.
Our electronic regulators by MRP (2026 catalogue)
KEMPS prices are for white; G.Grey is ₹440 (K613) and ₹495 (K614). Modular regulators cost more because they fit a modular frame.
Can a light dimmer be used as a fan regulator?
No. A dimmer is designed for lights, and a fan is a motor. A light dimmer on a fan can make it hum, run unevenly or overheat, and can damage the dimmer. Use a regulator labelled for fans.
We make dimmers too: the KEMPS K211 Tiny 450W (₹275) and K212 Duro 650W (₹425), and the VIZA V1271 450W (₹264), V1272 650W (₹371) and V1273 1000W (₹540). They are for lighting loads only. The wattage on a dimmer is the maximum lighting load it can control.
Some products are sold as a dimmer and fan regulator. Read the label: use it for a fan only if it is marked for fans.
Fan regulator connection: how it is wired
A fan regulator is connected in series with the fan, on the phase wire. Phase comes from the MCB to the fan switch, from the fan switch to the regulator, and from the regulator to the fan. The neutral goes directly to the fan and does not pass through the regulator.
Fan regulator connection, in order along the phase wire
A two-terminal regulator goes in the phase line after the fan switch. Follow the marking on the regulator itself.
Switch off the MCB and prove the circuit dead with a tester before touching a regulator. If you are not sure, call a licensed electrician.
Fan regulators and BLDC fans
A BLDC fan controls its own speed electronically, usually from a remote. Many BLDC fans are designed to be run from a plain on/off switch, not through a regulator. Our catalogue does not list any of our regulators as suitable for BLDC fans, so we do not recommend using them with one.
If you are fitting a BLDC fan, follow its maker’s instructions. On a new board, fit a switch for that fan instead of a regulator and keep the space for something else.
On an existing board, the simplest change for a new BLDC fan is to leave the old regulator in the off position and control the fan from its remote, or to have an electrician replace the regulator with a switch. Either way, the fan’s own instructions decide it.
Choosing a regulator for your switch board
Match the regulator to the board. On a modular board, pick the regulator from the same range as the switches, so it fits the frame: KEMPS in a KEMPS plate, VIZA in a VIZA plate. It takes one or two modules, so count it when you size the plate.
On a conventional board, a VIYONA mini or medium regulator or the plate type 5 step regulator fits in place of an old resistor regulator. Our KEMPS and VIZA pages list every module, and our switch board price guide prices a living room board with a regulator.
Counting modules? A regulator is one or two modules depending on the model. The plate size calculator includes it.
Replacing an old regulator
Replacing a resistor regulator with an electronic one is a common upgrade. On a conventional board it is usually a direct swap, the two wires moving to the new regulator. On a modular board, the regulator unclips from the frame like a switch.
The same safety steps apply as for any switch: MCB off, prove it dead, one wire at a time. Our guide to replacing a switch in a switch board covers them. If the fan hums or will not slow down afterwards, switch off and call an electrician.
For bulk or dealer orders, see our fan regulator manufacturing page.
FAQs
What are the types of fan regulator?
What is the difference between a 4 step and a 5 step regulator?
How is a fan regulator connected?
Can I use a dimmer as a fan regulator?
Can I use a regulator with a BLDC fan?
What is the price of a fan regulator?
Why buyers choose Vinayak Electricals
- Modular (KEMPS, VIZA) and conventional (VIYONA) switches, both made in-house in Mumbai.
- Switches made to IS 3854 under ISI licence CM/L-7567794.
- MRPs published openly in our catalogue, code by code.
- Plates from 1M to 18M in white, metallic, wood, glass and acrylic finishes.
- Sold through dealers across India; dealers can order from us directly.
- Over 30 years manufacturing electrical goods; ISO 9001:2015 certified.
