SR504-4 Switching Relay SR-504-4, 4 Channel Relay Module

Pickering 40-156-001 Power Relay Module

Cytec CY64/DRV VXI Bus 64 Channel Relay Driver

5V Relay Module 1/2/4/6/8 Channel Opto-Isolated for Arduino ESP32 Raspberry Pi

5V/12V/24V Relay Module with Optocoupler 1/2/4/6/8/16 Channel for Arduino Pi UK

Pickering PXI 75 x SPST Electromechanical Relay Module 40-145-10

5V 1/2/4/6/8 Channel Relay Board Module Optocoupler LED for Arduino PiC ARM AVR

4pcs 1 Channel DC 24V Relay Module with Optocoupler - Safe & Efficient Control