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    SCR AC Voltage Regulator Module

    5 out of 5 based on 2 reviews | Write a review
    Voltage regulator module (vrm) is single phase AC 220V/ 2-phase AC 380V SCR module with phase shifted output. With DC 0-5V or 4-20mA control mode for selection. Load current has 15A/25A/40A/75A/90A/120A, meets various electric needs.
    SKU: ATO-VRGM-20
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days


    • Internal feedback circuit has good linearity and voltage stability, high voltage resistance, high current resistance, and high temperature resistance.
    • Completely isolate weak and strong currents to ensure safe operation and control.
    • Widely used in chemical, food, machinery, packaging, textile equipment, CNC machine tools, entertainment facilities and other automatic control fields.


    Model ATO-SCR-LA-T
    Module Type Single phase or 2-phase
    Load Current (Optional) 25A, 40A, 75A, 90A, 120A
    Load Voltage 180-430VAC
    Ambient Temperature -20℃~+75℃
    Control Mode (Optional) 0-5VDC, 4-20mA
    On Voltage ≤2V
    Off Leakage Current ≤10mA
    On-off Time ≤10mS
    Dielectric Strength 2000VAC
    Certification CE
    Insulation Resistance 500MΩ/500VDC
    Mounting Method Bolted
    Work Instruction LED

    Wiring Diagram

    SVR voltage regulator module wiring diagram

    Voltage regulator module wiring

    Installation Dimension (Unit: mm)

    Voltage regulator module installation dimension

    Tips: Notes when using SCR AC regulator modules.

    1. When wiring, be careful not to confuse the live (L) and neutral (N) wires in main circuit. Grid voltage cannot be lower than the lower limit of load voltage, otherwise the SCR regulator module cannot operate normally.
    2. Resistive load must not exceed 60% of the regulator module rated current. Inductive or capacitive load cannot exceed 40% of the rated current. Motor load must not exceed 20% of the rated current.
    3. Overcurrent and short circuit are the main causes of permanent damage to the thyristor. Therefore, pay attention to the overcurrent protection for SCR voltage regulator module. Current protection can be performed using fast-acting fuses or air switches.
    4. When using the SCR voltage regulator module, corresponding heat sink should be equipped. When the load radiation conditions are not good, compensation should be increased, and short-circuit loads are not allowed.
    Existing reviews of SCR AC Voltage Regulator Module
    Please help to recommend the water pressure regulator for me.Thx~
    I own an RV. Park here in Texas. The water is sent to me at 150 psi by the company that delivers water to the parking lot.
    I need to lower the pressure in my 2" water main to 55 psi.
    The best I can do in regards to the details of my urgent need for a water pressure regulator is that.
    From: Ross | Date: 09/09/2022
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Recommend this 2 Inch Adjusting Water Pressure Regulator, SKU: ATO-WPR-DN50, which can be found on for more information on specs and price.
    SCR AC voltage regulator module can be used safely
    I rarely shop online. This is the first time I have purchased a product in the online store. I bought this SCR AC voltage regulator module with the attitude of giving it a try. Because it can completely isolate weak and strong currents, I can use it safely and securely.
    From: Heermans | Date: 25/03/2021
    Was this review helpful? Yes No (0/0)
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