The Siemens 3RT1916-4MA00 is a dust cover with a cage-clamp terminal design, packaged as a 150-piece lot for the S00 contactor frame size.
This cover snaps onto the S00 contactor body, protecting the coil terminals and wiring from dust ingress in panel environments. The cage-clamp style accepts solid or ferruled stranded conductors — strip length and wire gauge follow the contactor's terminal spec.
Sourcing Reality
No last-time-buy or obsolescence concerns for this order code.