CRYDOM D2425 Solid State Relay Input VDC Output VAC

The Crydom D2425 is part of the Series 1 range of solid state relays capable of switching 25 amp loads at line voltages between 24 VAC and 280 VAC. This relay is designed for endurance and reliability in harsh industrial applications and features rugged back-to-back (inverse parallel) SCRs to switch power to AC loads. This significantly reduces the total power dissipation of the D2425 in comparison to similar triac output solid state relays, in addition to enhancing the relay’s ability to withstand heavy surge currents. The typical MTBF (mean time before failure) of a Crydom D2425 is greater than 7 million hours.

The D2425 is a DC input solid state relay that can accept control signals between 3 VDC and 32 VDC. It incorporates an active current-limiting circuit which enables it to switch 25 amp loads with only 12mA of input current. This makes them highly compatible in applications utilizing low-power PLCs or control boards. The Crydom D2425 uses zero-crossing optical isolators to trigger the output SCRs. When an input signal is initially applied, the output of the solid state relay will not conduct load current until the AC mains passes through the zero-crossing point of the sine wave. This greatly reduces inrush currents and minimizes the level of conducted emissions coupled onto the AC mains by the solid state relay.