The relay contact header looks like 0.2″ (5.08mm) to me. Probably to fit screw terminal blocks. All good for low DC voltages. If you want AC switching then a SSR would be better.

Relay modules are electronic devices that are important components of electrical and electronic circuits. These five scenarios show how important they are in real-life scenarios. Best Relay Modules 1.

Below is the pinout of the ESP-01/ESP-01S module. Note that on some modules VCC is labelled as 3V3 and CH_PD as EN. Similarly, ... In order to use the ESP-01 Wi-Fi relay module, a ...

The Wixom manufacturing electronics manufacturer has released new BusWorks XT Series multi-channel optocouplers and interposing relay modules that connect discrete field devices to measurement and ...

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Opto 22's new SNAP-OMR6-A and SNAP-OMR6-C mechanical relay modules fill an important need for engineers, plant managers, technicians, and others seeking a cost-effective way to switch higher voltages ...

The 40-781A-92x (PXI) and 42-781A-92x (PXIe) modules consist of either a single or dual microwave changeover switch payload, capable of switching up to 110 GHz in 50 Ω.

The 857 Series Jumpflex modules offer a system approach to signal switching and conditioning. The 6-mm-wide, DIN-rail mount devices have a common profile that permits accessory sharing. The module ...

Designed to maintain coaxial switching continuity of a wide range of critical and severe environmental conditions, the Model 70A00 Series coaxial relay is equipped with built-in amplifier modules ...