TeSys integral suppressor module, for LD1LD, LD4LD, LD5LD contactor breakers (LD5LD requires 2 suppressor modules). To be used with =250V AC control circuit voltage, it provides RC protection limiting the transient voltage to 3 Uc max. Clip-on mounting on top of the contactor breaker, connection to the coil screw terminals. Green Premium compliant (RoHS/REACh).