8-Channel 12V Relay Module HW-281 (Optocoupler Isolated)
Prices updated: 12 Oct 2026
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| Store | product | Price | View in store |
|---|---|---|---|
 Microohm | Relay 12v 8 Channel Module 8 Road/Channel Relay Module (with light coupling) 12V HW-281 | 215 EGP290 | View in store |
Price history
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Lowest price recorded: 215 EGP
About this product
An 8-channel relay board with a 12V DC coil, optocoupler input isolation and 10A contacts, suited to controlling multiple AC or DC loads from a microcontroller. Each channel includes a freewheeling diode and an LED status indicator, with screw terminals (C, NC, NO) and mounting holes for enclosure installation.
Specifications
- Operating Voltage
- 12V DC
- Number of Channels
- 8
- Contact Rating
- 10A @ 250VAC / 10A @ 30VDC
- Input Isolation
- Optocoupler
- Terminals
- Screw terminal (C, NC, NO)
- Freewheeling Diode
- Yes, per channel
- Status Indicator
- LED per channel
- Mounting
- Mounting holes provided
Frequently asked questions
What is the price of 8-Channel 12V Relay Module HW-281 (Optocoupler Isolated) in Egypt?
8-Channel 12V Relay Module HW-281 (Optocoupler Isolated) currently costs 215 EGP in Egypt.
Where can I buy 8-Channel 12V Relay Module HW-281 (Optocoupler Isolated) in Egypt?
8-Channel 12V Relay Module HW-281 (Optocoupler Isolated) is available from Microohm. Compare the offers above to find the best price.
Do I need a separate power supply for the relay coils?
Yes. The relay coils are rated for 12V DC, so supply the relay side from a 12V source with enough current for all active coils. Keep the microcontroller and relay grounds connected together.
Can I control all 8 channels from a microcontroller with limited GPIO pins?
Each channel needs one input pin, so eight GPIO pins are required for independent control. If pins are limited, use an I2C or SPI port expander or a shift register to drive the inputs.
