BOM / RFQ

Siemens 3RT1916-2EJ21 SIRIUS Auxiliary Switch, 3 A, ON-delay

MPN3RT1916-2EJ21

Siemens SIRIUS auxiliary switch, 3RT1916-2EJ21, 3 A maximum, ON-delay 0.5...10 s, clip-on mounting, 45 x 38 x 75 mm.

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Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

3RT1916-2EJ21 — Control & Coil
Parameter	Value
Control supply voltage type	AC/DC
Rated value @ 50 Hz	24 V

3RT1916-2EJ21 — Connection & Mounting
Parameter	Value
Conductor cross-section, solid	1x (0.5 ... 4.0 mm²), 2x (0.5 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule	1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.5 mm²)
Mounting method	clip-on

3RT1916-2EJ21 — Environmental
Parameter	Value
Installation altitude, max.	2 000 m

3RT1916-2EJ21 — Mechanical
Parameter	Value
Width	45 mm
Height	38 mm
Depth	75 mm

Product details

It delivers a single ON-delay, adjustable from 0.5 to 10 s, with a recovery time of 150 ms between cycles. The switch is rated for a maximum of 3 A, with specific switching capacities of 1 A at 24 V, 0.2 A at 125 V, and 0.1 A at 250 V.

Mounts via clip-on fastening to a DIN rail or directly onto the base contactor. The 45 mm width and 38 mm height keep it compact on the rail; depth is 75 mm. Wiring accepts 1x (0.5 to 4.0 mm²) or 2x (0.5 to 2.5 mm²) solid conductors, or 2x (20 to 14 AWG) stranded.

Frequently asked questions

What are the key ratings for the 3RT1916-2EJ21?

Maximum current is 3 A. Switching capacity is 1 A at 24 V, 0.2 A at 125 V, and 0.1 A at 250 V. The ON-delay is adjustable from 0.5 to 10 s with a 150 ms recovery time.