Relay Modules

Choose a relay module for its control and load circuits

A relay module combines switching components with a control board. The control-side voltage and the load-side contact ratings are separate specifications. This range includes different channel counts and switching technologies, so read the individual listing carefully.

• Confirm the supply voltage and supported trigger logic.
• Choose the channel count and contact arrangement required.
• Check contact ratings for the actual AC or DC load and load type.
• Verify isolation, protection and enclosure requirements for the installation.

For individual switching components, compare relays. Browse Arduino boards and modules for control-project options and power supplies for suitable power. A printed maximum rating does not make exposed mains wiring safe; use properly rated protection and competent installation for hazardous voltages.