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4000W SCR Module Dimming Speed Temperature Electronic Voltage Regulator

  • WBT-4000W
  • NQQK

4000W power 220VAC Adjust temperature speed Voltage Regulator speed Regulator

Product Description

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Product name Thyristor electronic regulator
Product number WBT-4000W
Input voltage AC220V
Output voltage 10-220V adjustable (the output voltage is less than the input voltage)
Maximum power  4000W (at 220V)
Voltage regulation range 0-220V stepless adjustable (with load conditions) step-down can be 0, boost starting 20V or so.
Rated current 9A 
Maximum current 18A
Product Features Zero hysteresis, zero delay, with a peak voltage to attract the circuit to effectively protect high-power thyristor against surge, anti-spike, RC absorption of multiple protection

Thyristor electronic regulator 

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Thyristor electronic regulator Use range

Household appliances, industrial electrical appliances, scientific test equipment, factories, schools and other electrical equipment


Note: must first turn on the load and then debug voltage (measured voltage)


SCR is mainly applied to resistive load (electric wire incandescent lamp, etc.), single-phase AC power can also be the majority, guaranteed not guaranteed, other types of load please buyers to confirm. Fuse is not a panacea, there is reaction time, if the current is too large, in addition to burn out the fuse, the module may burn, the voltage range can be really adjustable from 10V-220V smooth, more suitable for low voltage driven heating wire industrial enterprises Use: such as cutting styrofoam, Zhenzhu Mian, raincoat production.


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4000W AC220V 10-220V Adjust Voltage temperature speed Luminosity Thyristor SCR AC electronic regulator 4000W AC220V 10-220V Adjust Voltage temperature speed Luminosity Thyristor SCR AC electronic regulator4000W AC220V 10-220V Adjust Voltage temperature speed Luminosity Thyristor SCR AC electronic regulator4000W AC220V 10-220V Adjust Voltage

A thyristor is a solid-state semiconductor device with four layers of alternating N and P-type material. It acts exclusively as a bistable switch, conducting when the gate receives a current trigger, and continuing to conduct while the voltage across the device is not reversed (forward-biased). A three-lead thyristor is designed to control the larger current of its two leads by combining that current with the smaller current of its other lead, known as its control lead. In contrast, a two-lead thyristor is designed to switch on if the potential difference between its leads is sufficiently large (breakdown voltage).

Some sources define silicon-controlled rectifier (SCR) and thyristor as synonymous.[1] Other sources define thyristors as a larger set of devices with at least four layers of alternating N and P-type material.

The first thyristor devices were released commercially in 1956. Because thyristors can control a relatively large amount of power and voltage with a small device, they find wide application in control of electric power, ranging from light dimmers and electric motor speed control to high-voltage direct current power transmission. Thyristors may be used in power-switching circuits, relay-replacement circuits, inverter circuits, oscillator circuits, level-detector circuits, chopper circuits, light-dimming circuits, low-cost timer circuits, logic circuits, speed-control circuits, phase-control circuits, etc. Originally, thyristors relied only on current reversal to turn them off, making them difficult to apply for direct current; newer device types can be turned on and off through the control gate signal. The latter is known as a gate turn-off thyristor, or GTO thyristor. A thyristor is not a proportional device like a transistor. In other words, a thyristor can only be fully on or off, while a transistor can lie in between on and off states. This makes a thyristor unsuitable as an analog amplifier, but useful as a switch.

temperature speed Lumin

Trade Information
Payment terms T/T,L/C,Western union,Paypal,Escrow,MoneyGram
Payment conditions 30% deposit in advance,70% balance before shipping.
Delivery time 3-7working days after deposit,2-4 working days for inventory
Packing Neutral carton,Wooden case for large size
Shipping By sea,by air and by express delivery

osity Thyristor SCR AC electronic regulator


Q:How to order our product ? 

A:1).Please tell us the model and quantity and other request you need. 

   2).We make the PI for you.

   3).After you confirm the PI, we arrange the order for you after receiving your payment.

   4).After the goods finished, we send the goods out to you and tell you the tracking number.

   5).We will track your goods until you receive the goods. 

Q:  What's your warranty ?

A: 1-2 years

Q: What's your contact information:

A: Our address: Liushi town, Zhejiang province, China. 

Q: What's your shipment method?

A: We ship by Express, by air, by sea, by train. Normally we checked and compare, then provide

customer the most proper shipment method.

Q: What's about MOQ?

A: First order MOQ=1pcs

Q: If i want to release order, what's the payment method you accept ?

A: We accept T/T, Paypal, Western union, L/C,etc.

Q: If i want to release order, what's the process?

A: Thanks. You can send inquiry to us by alibaba, or send us by email, we will reply within 24hrs.

Company Information

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Contact us

JBK series 40VA to 2500VA machine tool control transformer


ADD:NO.18 QunYing Road, Xingguang Industrial Zone, liushi, Yueqing City, Zhejiang, China

Tel: +86 577 61787391               Fax:+86 577 61787392


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