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Green circuit board with eight black relay modules and a 40-pin GPIO header

LORDWORLD

LORDWORLD 8-Channel Relay Development Board 5A 250V AC 30V DC 40PIN GPIO

SKU CH-4T4B-3TJWQ

Controls eight independent circuits up to 250 V AC or 30 V DC via a 40-pin GPIO header with optical isolation and selectable control pins

  • Controls high-power loads up to 5A at 250V AC or 30V DC
  • Photo-coupling isolation protects the host board from high-voltage interference
  • Works with Raspberry Pi 40PIN GPIO and Jetson Nano via standard header
  • Onboard LEDs give instant visual confirmation of each relay state
  • Jumper-selectable control pins plus reserved interface suit custom or PLC wiring

Purpose and audience

This 8-channel relay development board targets makers and engineers who need to switch mains-voltage or low-voltage DC loads from a Raspberry Pi or Jetson Nano. It provides a ready-to-use interface for home-automation, industrial-control or prototyping projects that require galvanic isolation between the controller and the switched circuit.

Capacity and headroom

Each of the eight relays handles up to 5A at 250V AC or 5A at 30V DC, giving ample headroom for lighting, pumps, heaters or small motors. The photo-coupling isolation protects the host board from high-voltage transients, but the 5A per-channel limit means heavier loads such as large heaters or three-phase equipment are outside its range.

Build integration

The board plugs directly onto the 40PIN GPIO header and includes a rail-mount case for DIN-rail enclosures. A jumper block lets you reassign control pins away from the defaults, freeing GPIO for other peripherals, while a reserved control interface allows connection to PLCs or alternative controllers. Onboard status LEDs give immediate visual feedback without extra wiring.

Highlights

  • Controls high-power loads up to 5A at 250V AC or 30V DC
  • Photo-coupling isolation protects the host board from high-voltage interference
  • Works with Raspberry Pi 40PIN GPIO and Jetson Nano via standard header
  • Onboard LEDs give instant visual confirmation of each relay state
  • Jumper-selectable control pins plus reserved interface suit custom or PLC wiring

Specifications

BrandLORDWORLD

Questions about this item

Will the 40PIN GPIO header on this relay board align with the header on my older Raspberry Pi 2B?

Yes, the standard 40PIN GPIO extension header is designed to fit Raspberry Pi A+, B+, 2B, 3B, 3B+ and 4B models, so it will connect directly to your Pi 2B without an adapter.

How can I verify each of the eight relays is switching correctly once I have wired the board?

Onboard status LEDs illuminate when a relay coil is energised, giving immediate visual confirmation that each channel is responding to your control signals.

Does the package include jumper shunts for the relay control pin selection header, or must I source them separately?

The board provides a relay control pin selection jumper header so you can reassign channels to custom GPIO pins; whether shunts are supplied in the box is not detailed in the product information.

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