Solid State Relays, Power Units, Temperature Controllers

The EL.CO. standard production of the solid state relays is divided into three main groups:

1. Zero-crossing relays
The zero crossing relays pick-up when the output voltage is near to zero and always drop-out at zero-current. They are particularly suitable for the commutation of resistive and capacitive loads.

2. Instant commutation relays
The instant commutation relays pick-up simultaneously to the input signal and then at each point of the sinusoidal output voltage curve and drop-out at zero-current. They are particularly suitable for the commutation of inductive loads.

3. D.C. commutation relays
The relays for D.C. load commutation pick-up and drop-out simultaneously to the control voltage.

Recommended application:
The solid-state relays can particularly be used where a high commutation frequency is required together with the possibility of commutating, by means of limited control voltage (3 V-3 mA), high currents (90 A-480V) with 4 KV insulation between input-output. They are extremely resistant to vibrations or oxidation as well as to mechanical impacts and do not cause arcs nor fluctuations.