Modular solid-state relay SSR-5A-D

How does the SSR-5A-D relay work?

Applying supply voltage to the contactor coil will cause the contact to switch. Switching on the contactor is indicated by a red marker in the window. After a power failure, the contacts return to their original position.

Features of the relay

• Switching on the load at "zero" - reduction of current surge when switching on the circuit (e.g. LED lighting);
• Built-in thermal protection and operation signaling;
• Noiseless operation;
• Switching on without sparking or contact vibration;
• Unlimited number of connections;

Operation of the SSR-5A-D solid-state relay

Applying voltage to control terminals 1-3 (see the DIAGRAM tab) activates the electronic switch closing the circuit between terminals 10-12. The circuit is closed when the sine wave of the supply voltage crosses zero. This allows you to limit current surges when connecting a capacitive load. The activation of the circuit is indicated by the green indicator light. After a power failure, the contact between terminals 10-12 opens.

Thermal protection

The SSR-5A-D relay has a thermal protection system. It disconnects the load when the permissible temperature inside the device is exceeded. Activation of the protection is signaled by turning on the red indicator light. When the temperature inside the device drops to a safe level, the load is automatically turned on again.