We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green circuit board with eight black relay modules and a 40-pin header

WaveShare

WaveShare 8-Channel SPST-NO Relay Module for Raspberry Pi

SKU CH-5Z2A-2ARPM

Eight SPST-NO relays rated at 5A/250VAC or 3A/30VDC add isolated high-voltage switching to Raspberry Pi A+, B+, 2B, 3B, 3B+ and 4B via a 2x20-pin header

  • CPU TypeOther
  • 8 SPST-NO relays switch mains or DC loads
  • Each channel rated 5A at 250VAC or 3A at 30VDC
  • Dual PCB layout isolates Pi from high-voltage switching
  • 2×20-pin header passes all GPIOs through for further add-ons
  • Per-channel status LEDs show power and relay state

8-Channel SPST-NO Relay Module

This module adds eight independently controlled power relays to a Raspberry Pi, enabling IoT and industrial automation projects. It connects via the 40-pin GPIO header and fits Pi models from A+ through 4B. The board uses a dual-PCB layout to isolate the Pi from high-voltage switching. The Raspberry Pi itself is not included.

Makers adding mains or DC load control

Builders who need to switch eight separate 5 A AC or 3 A DC circuits from a Pi will find this module a direct fit. Projects requiring more than eight channels or the ability to stack additional HATs on top should look elsewhere, as the board does not support multi-HAT stacking. Users wanting solid-state switching or changeover contacts are not served by this design.

5 A at 250 V AC per channel

Each of the eight relays is rated for 5 A at 250 V AC or 3 A at 30 V DC, which sets the maximum load the module can safely switch. Exceeding these limits risks contact welding or board damage, so the rating is the primary figure to verify against your application. No other specification in the data sheet overrides this contact rating.

Highlights

  • 8 SPST-NO relays switch mains or DC loads
  • Each channel rated 5A at 250VAC or 3A at 30VDC
  • Dual PCB layout isolates Pi from high-voltage switching
  • 2×20-pin header passes all GPIOs through for further add-ons
  • Per-channel status LEDs show power and relay state

Specifications

CPU TypeOther

Questions about this item

How do I mount the 2x20-pin header onto the Raspberry Pi GPIO without bending pins?

Align the 2x20-pin header with the Pi's GPIO rows, press straight down until fully seated, and avoid angling the module which bends pins.

What part wears out first and needs replacement on the 8-channel SPST-NO relay module?

The mechanical relay contacts rated at 5Amp/250AC or 3Amp/30VDC per channel wear with switching cycles and are the primary replaceable component.

At what sustained load does the 3Amp/30VDC contact rating become the limiting factor?

Continuous DC loads above 3Amp at 30VDC exceed the relay contact rating and will cause premature contact degradation.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.