4000W SCR Voltage Regulator Cooling Fan | AC 110V-220V

4000W SCR Voltage Regulator with Cooling Fan — AC 110V–220V

Take precise control of your electrical appliances with this heavy-duty 4000W SCR Voltage Regulator. Whether you need to dial in lamp brightness, fine-tune motor speed, or manage the output of a heating element, this compact and powerful controller makes it effortless — just turn the knob.

Key Features

• Dual-Way SCR Design: Equipped with two-way large-power silicon controlled rectifiers (SCR) rated up to 20A, delivering stable, smooth voltage adjustment without overcurrent issues common in low-resistance heating devices.
• Wide Voltage Range: Supports AC input of 110V–220V with adjustable output from 0V up to the input voltage — giving you full-range control.
• Built-In Cooling Fan: The integrated cooling fan actively dissipates heat, keeping the unit running safely during extended use at high loads.
• Simple Knob Operation: Just connect the input terminals to your live/neutral wires and the output to your load — then rotate the potentiometer knob to smoothly regulate voltage. No complex wiring or setup required.
• Multi-Application Use: Ideal as a lamp dimmer, small motor speed regulator, electric stove heat controller, water heater controller, or soldering iron temperature manager.
• Compact Form Factor: Measures just 85 × 60 × 45 mm (3.34 × 2.36 × 1.77 in) — easy to integrate into a workbench, workshop, or appliance setup.

Specifications

⚠️ Important Usage Notes

• Maximum output voltage equals input voltage (e.g., 110V input → 110V max output; 220V input → 220V max output).
• The 4000W rating applies to resistive loads only (e.g., heating coils, incandescent lamps). For inductive or capacitive loads (e.g., motors, transformers), reduce the load to 50% or less to prevent damage to the controller and load device.
• Always ensure proper ventilation around the unit during operation.

What's in the Box

• 1 × 4000W SCR Voltage Regulator with Cooling Fan

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For electrical safety standards and best practices when working with AC voltage controllers, refer to the OSHA Electrical Safety Guidelines.

Frequently Asked Questions

Q: Can this 4000W SCR voltage regulator be used with motor loads?

A: Yes, but with caution. For inductive loads such as small motors, the usable power must be reduced to 50% or less of the rated 4000W capacity. Using the full 4000W rating on inductive or capacitive loads risks damaging both the controller and the connected device. Always derate appropriately for non-resistive loads.

Q: Does this voltage regulator work with both 110V and 220V AC systems?

A: Yes. The unit supports AC input from 110V to 220V. The maximum output voltage will equal the input voltage — so a 110V input gives up to 110V output, and a 220V input gives up to 220V output. It automatically adapts to your local supply voltage within this range.

Q: What applications is this SCR voltage regulator best suited for?

A: This regulator is ideal for dimming incandescent or halogen lamps, adjusting the speed of small AC motors, controlling the heat output of electric stoves or soldering irons, and managing water heater temperatures. It is not recommended for use with LED drivers, switching power supplies, or large inductive machinery without proper load derating.

Q: Is the cooling fan necessary, and is it noisy?

A: The built-in cooling fan is essential for maintaining safe operating temperatures during high-load or extended use. The fan runs quietly and helps prolong the lifespan of the internal SCR components by actively managing heat buildup.