Bi-stable power relay is for smart energy applications

A latching power relay from Zettler, the AZ 7621 P series can switch 16A at 250V AC. Its electric life expectancy is 50k cycles operations at maximum ambient temperature of up to 85 degree C. It is compact, with a low height of 15.7mm, standard frame as well as standard contact layout. It is designed for energy smart applications in a range of industries including industrial control, heating systems and building automation applications.

There are two types available: single- and dual-coil. At typical set/reset voltage the coil power range amounts to 196mW (single coil) or 294mW (dual coil) as well as 318mW (dual coil 24V DC). At nominal coil voltage set time as well as reset time is typically 10ms. Contact ratings for resistive loads are 4,000 VA for maximum switched power, 16A for maximum switched current and 440V AC maximum switched voltage. A 5kV coil-contact dielectric strength and a 1kV dielectric strength between open contacts ensure that the AZ 7621 P is robust for even highly susceptible applications, says the company.

The relay meets DIN VDE 0110 and IEC 60664-1 for basic insulation. Gold plated versions for contacts are optional. The terminals are tinned copper alloy, P. C. and the contact form is 1 form A (SPST-N.O.) or 1 form C (SPDT).


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