2-channel 12V relay module with optical isolation for Arduino, ESP32 and automation systems
Part number:
13344SKU: AA-0090133442-channel relay module with 12V coils and optocoupler input isolation. Allows independent control of two high-power loads via a microcontroller signal.
Key specifications
- Relay supply voltage12V DC
- Number of channels2
- RelayFL-3FF-S-Z
- Maximum load10A 250V AC / 30V DC
- Input isolationoptocouplers
The 2-channel 12V relay module is designed to independently control two high-power loads — lamps, pumps, fans, electromagnetic locks and valves — based on signals from a microcontroller. The board carries two FL-3FF-S-Z relays with 12V DC coils. The control inputs are isolated by optocouplers, which protects the microcontroller from interference from the power side. Each channel has its own 3-pin screw terminal block (NO, COM, NC), a protection diode and an indicator LED. Control connects through a pin header: GND, IN1, IN2, VCC; a jumper on the board lets you power the relay coils from a separate source. The module is convenient wherever the system already runs on 12V: automotive electronics, solar installations, greenhouses, aquariums, smart home systems. Specifications: Relay supply voltage: 12V DC Number of channels: 2 Relay: FL-3FF-S-Z (12VDC) Switching load per relay marking: 10A 250V AC / 30V DC, 12A 125V AC / 28V DC Input isolation: optocouplers Load contacts: NO, COM, NC on each channel Control connector: GND, IN1, IN2, VCC