2000W SCR Electronic Speed Controller with External Knob – Industrial Voltage Regulator for Motors, Pumps & High-Power Equipment

SKU: FA2020-2
Input Voltage

AC 220V
Output Voltage

AC 50V – 220V (Adjustable)
Maximum Power

2000W (Resistive Load Peak)
Continuous Working Power

1200W – 1500W (Recommended for long-term stability)
Voltage Regulation Range

0% – 100%
SCR Model

BTA16-600B (High-Power Bidirectional Thyristor)
Knob Lead Length

Approx. 15cm – 20cm
Dimensions (PCB)

Approx. 48mm x 35mm x 28mm
This 2000W SCR Electronic Speed Controller is an industrial-grade solution for precision AC power management. Designed with a convenient External Potentiometer Knob, this module can be easily mounted into control panels, project boxes, or machinery housings while keeping the high-voltage circuitry safely enclosed.
Utilizing a high-performance bi-directional Silicon Controlled Rectifier (SCR), this regulator provides stepless adjustment for a wide range of AC-powered equipment. It is particularly effective for controlling the speed of brushed motors (universal motors), the intensity of heating elements, and the brightness of high-wattage incandescent lighting.
Description
The 2000W SCR Voltage Regulator is engineered for durability and ease of integration. Unlike standard PCB-mounted dimmers, this unit features a detachable lead for the adjustment knob, allowing for flexible ergonomic placement in professional workstations or DIY enclosures.
The heart of the module is an upgraded BTA16 thyristor, supported by high-voltage capacitors and a rugged aluminum heatsink. This ensures the device can handle the high-current demands of industrial pumps, power tools, and furnaces without overheating. It provides a smooth, linear output curve, allowing for granular control over the performance of your equipment, from a soft start to full-throttle operation.
Key Features
  • External Knob Design: The potentiometer is connected via a flexible cable, making it ideal for panel-mount installations and custom control boards.
  • High-Performance SCR: Equipped with a BTA16-600B thyristor for reliable switching and high-current handling.
  • Stepless Regulation: Provides a smooth, linear adjustment range from 50V to 220V AC.
  • Industrial-Grade Protection: Features high-voltage absorption capacitors and an RC snubber circuit to protect the internal components from inductive spikes and surges.
  • Efficient Heat Dissipation: Large aluminum cooling fins ensure the module remains stable during prolonged high-wattage use.
  • FR-4 Fire-Resistant PCB: Built on a high-temperature, flame-retardant circuit board for maximum safety in industrial environments.
Usage Guidelines
  1. Wiring Configuration: Connect the AC input lines to the “Input” terminals and your device to the “Output” terminals. Important: You must connect a load (e.g., a motor or bulb) before you can measure the adjusted voltage.
  2. Mounting the Knob: Unscrew the nut on the potentiometer, insert the shaft through your control panel hole (approx. 7mm), and tighten the nut before re-attaching the plastic knob.
  3. Operation: Rotate the knob clockwise to increase the output power.
  4. Load Management:
    • Resistive Loads: (Heaters, Ovens, Incandescent Lamps) Safe up to 2000W peak.
    • Inductive Loads: (Brushed Motors, Sump Pumps, Fans) Should not exceed 800W–1000W to account for the high inrush current during startup.
  5. Safety: Always ensure the module is installed in a dry, ventilated environment.
Q: Can I use this for the speed control of a ceiling fan?

This regulator is designed for Brushed (Universal) Motors. Most ceiling fans use induction motors; using this regulator may cause them to hum or overheat. It is best suited for portable fans, blowers, and power tools with carbon brushes.

Q: Is the external knob cable extendable?

Yes, the cable can be extended if necessary, but we recommend keeping it as short as possible (under 50cm) to prevent electromagnetic interference and maintain precision control.

Q: Why does the voltage only start at 50V?

This is a safety and functional feature. Starting at approximately 50V ensures that motors have enough initial torque to spin. Below this voltage, motors may stall and burn out their internal windings.

Q: Is this suitable for commercial oven or furnace maintenance?

Yes. Business purchasers frequently use this module for fine-tuning the heat of commercial pizza ovens, heat sealers, and plastic extrusion heaters. For 24/7 industrial use, keep the load under 1200W for maximum longevity.

Q: Does it work with 110V AC input?

This module is optimized for 220V. While it may function at 110V, the regulation range will be significantly limited and the efficiency will drop.

Q: Can I use this to control the brightness of LED strips?

No. This is an AC-to-AC regulator. LED strips typically require DC-to-DC PWM controllers. This unit is only for AC loads like incandescent or halogen bulbs.

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