The Siemens SIRIUS 3RT1916-2BE01 is an OFF delay device — a pneumatic timer attachment that holds a contactor or contactor relay closed for a set period after control power is removed. It is designed for DC-operated contactors in sizes S00 through S3 and for 3RH contactor relays with DC coils. The screw-type terminals accept the auxiliary and control circuit wiring. Finger-safe touch protection is built in. The device is rated for contactor sizes S00 and S0, covering the compact SIRIUS frame sizes used in motor control centers and panel builds.
This part is listed as a phased-out product. The official successor is the SIRIUS 3RT2 series — the same form-factor class with updated coil technology. For a BOM line locked to the 3RT1916-2BE01, the 3RT2 equivalent should be verified for direct drop-in fit, particularly the mounting footprint and terminal layout.
Panel Integration
The device occupies the same width as the base contactor — no additional DIN rail space beyond the contactor's own footprint. Screw terminals accept 2x (0.5... 1.5 mm²) solid or 2x (0.75... 2.5 mm²) stranded with ferrule, matching typical control wiring in panel builds. No protective wiring component is included; the delay device is a standalone add-on that mounts directly to the front of the contactor. The finger-safe design means no additional shrouding is required for the terminals in a standard IP20 enclosure.