Mike Baldwin, TE Connectivity
Capacitive load switching sources in military systems: How to extend relay switching life and reliability
With high-performance electromechanical relays continuing to play an important part in military and aerospace applications, it is important for engineers to capture all the electrical requirements. A critical area is extending relay switching life under capacitive transient high inrush current conditions by complying with manufacturers' relay product performance specifications. Capacitors generate high current surges that can adversely affect circuit performance in such applications. These transients, while very brief in nature, can dramatically exceed the steady-state ratings for the contacts in a high-performance electromechanical relay.