Non-latching mini relay breakout with JST PH 2 mm connector for solderless microcontroller wiring, switching loads up to 250 V AC or DC. Controlled by any 3.3 V or 5 V digital output; suitable for lamps, fans, and solenoids.
STEMMA/JST PH red power wire for the relay board input; source states it works with any 3V or 5V microcontroller and uses about 50mA when active.
STEMMA/JST PH ground return for the relay board input.
STEMMA/JST PH white signal wire. Pulling Signal high switches the relay so COM connects to NO and NC disconnects.
Relay common contact. Source states COM is normally mechanically connected to NC and switches to NO when Signal is high.
Normally closed relay contact. Source states COM is connected to NC when the relay is not active and NC disconnects when Signal is high.
Normally open relay contact. Source states NO is disconnected normally and connects to COM when Signal is high.
| Pin | Type | Function | Voltage |
|---|---|---|---|
| VCC | Power | STEMMA/JST PH red power wire for the relay board input; source states it works with any 3V or 5V microcontroller and uses about 50mA when active. | 3V or 5V logic supply, source-stated |
| GND | Ground | STEMMA/JST PH ground return for the relay board input. | 0V |
| Signal | GPIO | STEMMA/JST PH white signal wire. Pulling Signal high switches the relay so COM connects to NO and NC disconnects. | 3V or 5V logic compatible, source-stated |
| COM | Unknown | Relay common contact. Source states COM is normally mechanically connected to NC and switches to NO when Signal is high. | Switching contact, source states up to 2A at 30VDC or about 40VAC or lower, lower current at higher voltages. |
| NC | Control | Normally closed relay contact. Source states COM is connected to NC when the relay is not active and NC disconnects when Signal is high. | Switching contact, source-stated ratings apply. |
| NO | Unknown | Normally open relay contact. Source states NO is disconnected normally and connects to COM when Signal is high. | Switching contact, source-stated ratings apply. |
STEMMA/JST PH red power wire for the relay board input; source states it works with any 3V or 5V microcontroller and uses about 50mA when active.
STEMMA/JST PH ground return for the relay board input.
STEMMA/JST PH white signal wire. Pulling Signal high switches the relay so COM connects to NO and NC disconnects.
Relay common contact. Source states COM is normally mechanically connected to NC and switches to NO when Signal is high.
Normally closed relay contact. Source states COM is connected to NC when the relay is not active and NC disconnects when Signal is high.
Normally open relay contact. Source states NO is disconnected normally and connects to COM when Signal is high.
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