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Green circuit board with multiple black relay cubes and pin headers

Traditions (Generic)

Traditions (Generic) 5V 1 2 4 8 Channel Relay Module with Optocoupler computer power cord

SKU CH-2HNJ-T6217

A 5 V relay module with optocoupler isolation available in one, two, four or eight channels

  • Optocoupler isolation protects control circuits from voltage spikes
  • 5 V operation suits microcontroller and Arduino projects
  • Choice of 1 2 4 or 8 channels fits different switching needs
  • Relay outputs enable direct control of higher-power loads

5V Relay Module with Optocoupler

This 5V relay module provides one to eight independently switched channels for low-voltage control circuits. The integrated optocoupler isolates the signal side from the load side to protect the driving electronics. It suits hobbyists, students and engineers building automation or switching projects.

Select the channel count that matches your load

Choose the 1, 2, 4 or 8-channel variant so the number of relay outputs equals the number of devices you must switch. A module with fewer channels cannot drive all loads, while extra channels remain unused but do not affect operation.

How it compares

Measured against everything we stock in PC Power Cables, at today’s prices. Recalculated every night.

Price $7.99
Cheaper than about 85% of the 1,029 comparable items (median $15.99).

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Specifications

No published specifications for this item yet.

Questions about this item

What does the 5 V rating mean when the relay module is installed in a system?

The module operates from a 5 V supply, so it can be driven directly by a 5 V microcontroller or Arduino board without extra level-shifting.

What interface does the module use and what does it limit in practice?

It uses a simple low-level trigger input per channel; each input draws only a few milliamps, so the driving GPIO pin is the practical limit.

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