12V DC Relay Module High/Low Trigger 2/4/8CH
Price range: Rs 380.00 through Rs 1,580.00 (-7%)
Quick Info:
- Channels : 2 / 4 / 8 (as selected)
- Relay Coil Voltage : DC 12V (separate supply required)
- Control Logic : 3.3V / 5V TTL
- Trigger Mode : High / Low (jumper selectable)
- Isolation : SMD Optocoupler per channel
- Contact Rating : AC 250V / 10A — DC 30V / 10A
- Contact Type : SPDT (NO + NC + COM)
This optocoupler-isolated relay module is built around 12V coil relays, making it the correct choice for systems where the relay power rail operates at 12V — such as automotive electronics, 12V solar systems, industrial control panels, and battery-backed automation setups. Available in 2, 4, and 8 channel configurations, each relay channel is independently driven by its own 12V coil and isolated via a dedicated SMD optocoupler, ensuring a solid electrical barrier between the 12V relay circuit and your sensitive 3.3V or 5V microcontroller GPIO pins.
It is important to note that this module requires a dedicated 12V DC supply connected to the relay power input — the 5V or 3.3V logic supply from your microcontroller is used only for the control signal side and cannot drive the 12V relay coils. The optocoupler isolation handles the voltage-level boundary cleanly, protecting your microcontroller from the relay switching transients on the 12V side. Each channel supports jumper-selectable High or Low level triggering, giving full compatibility with both active-high and active-low GPIO outputs. A fault-tolerant design ensures relays will not accidentally actuate if the control signal line is left floating or disconnected.
Relay contacts are rated at AC 250V / 10A and DC 30V / 10A, with SPDT (NO + NC + COM) screw terminal outputs per channel. A green power LED and individual red relay status LEDs provide at-a-glance operational feedback. Compatible with Arduino, ESP32, Raspberry Pi, STM32, PIC, and any other 3.3V or 5V TTL logic microcontroller.
Specification:
- Available Channels : 2 / 4 / 8 (as selected)
- Relay Coil Voltage : DC 12V (dedicated 12V supply required)
- Trigger Mode : High or Low level (jumper selectable per channel)
- Isolation : SMD Optocoupler per channel
- Relay Contact Rating : AC 250V / 10A, DC 30V / 10A
- Max Switching Voltage : 250V AC / 30V DC
- Contact Type : SPDT — NO (Normally Open) + NC (Normally Closed) + COM
- Mounting Holes : Yes — M3 corner holes
- Package Includes : 1 × 12V Relay Module (channel count as selected
Additional information
| Channels | 2 Channel, 4 Channel, 8 Channel |
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