Stamford M40FA610A Automatic Voltage Regulator (AVR)
The M40FA610A Automatic Voltage Regulator (AVR) is a highly reliable, solid-state electronic control module designed specifically for brushless alternators. It ensures stable and consistent voltage output under varying load conditions, protecting your critical electrical equipment from fluctuations. The unit features built-in adjustment potentiometers for Stability (STAB), Frequency (FREQ), and Voltage (VOLT), allowing for precise generator calibration. It is equipped with multiple terminal blocks (including 9, Q, 60, A, B, 6, 8, M) and configurable voltage selection jumpers for 230V, 300V, and 400V systems. Housed in a durable black protective casing with clear hazard warnings, this AVR incorporates high-quality internal components such as a toroidal inductor, heavy-duty capacitors, and a robust rectifier assembly for optimal continuous performance and safety.
Technical Specifications:
- Model & Compatibility: M40FA610A, designed for use with industrial brushless alternators.
- Voltage Selection: Configurable via onboard jumpers for 230V, 300V, and 400V AC systems.
- Adjustability: Integrated potentiometers for the precise tuning of Voltage (VOLT), Stability (STAB), and Frequency (FREQ).
- Terminal Connections: Comprehensive multi-terminal block layout including 9, Q, 60, A, B, 6, 8, M, 0, U, and DC (+, -).

| Brand | STAMFORD |
|---|---|
| Model | M40FA610A |
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ENERAL DELIVERY INFORMATION
Orders will be processed and shipping during standard working hours (0830 – 1700 GMT+8) Monday to Friday (excluding Bank Holidays)
On rare occasions, your order may be handled and/or processed on a Saturday. However, we are unable to ship items on weekends, therefore any orders dealt with on the weekend will be send out the next following working day.
The cut-off point for orders to be shipped the same day is 14:00 – please contact us to confirm stock levels before placing your order
Any orders placed after the cut-off will ship the next working day assuming all parts are in stock and ready for dispatch.
All orders:
- must be paid for in full before any goods are dispatched
- require a signature upon delivery. Please ensure delivery can be made to an address where someone will be available to sign for the delivery
- are packaged with great care, ensuring your order and the contents it contains, makes it safely through the delivery network
Stamford M40FA610A Automatic Voltage Regulator (AVR)
Optimize your generator’s performance with the M40FA610A Automatic Voltage Regulator (AVR). Designed for brushless alternators, this highly reliable module features precise VOLT, STAB, and FREQ adjustments, alongside 230V, 300V, and 400V jumper configurations. Ensure steady power output and maximum electrical protection for your systems with this premium replacement AVR.

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