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Siemens 3RH1911-2FB11 — Contactors

Siemens 3RH1911-2FB11 SIRIUS Auxiliary Switch Block, 10 A, S

MPN3RH1911-2FB11

Siemens SIRIUS 3RH1911-2FB11 auxiliary switch block, 1 NO + 1 NC, 10 A, spring-loaded terminals, snap-on mounting for Size S00 contactors.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RH1911-2FB11 — Ratings & Performance
ParameterValue
Rated value @ 24 V10 A
Rated value @ 60 V4.7 A
Rated value @ 110 V3 A
Rated value @ 220 V1.2 A
3RH1911-2FB11 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1911-2FB11 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
3RH1911-2FB11 — Mechanical
ParameterValue
Width36.5 mm
Height37.5 mm
Depth46 mm

Product details

It provides one normally open (NO) and one normally closed (NC) contact, rated for a maximum of 10 A, with switching capacities specified across a range of voltages — for example, 6 A at 24 V, 6 A at 230 V, and 3 A at 400 V. The spring-loaded terminals accept conductors without core end processing up to 2x 2.5 mm², making for quick wiring in panel builds.

Integration Notes

Snap-on mounting onto Size S00 contactors or contactor relays means it clips directly onto the device front without tools. The 36.5 mm width and 46 mm depth keep the assembly within the standard DIN-rail envelope. Spring-loaded terminals reduce wiring time compared to screw terminals, and the IP20 front protection is standard for enclosed panel use.

Key Ratings in Context

The 10 A maximum rating applies across the contact set, but the actual switching capacity depends on the circuit voltage and load type. For AC-15 control-circuit duty at 690 V, the rated value is 1 A.

Frequently asked questions

What replaces the 3RH1911-2FB11?

The official successor is the SIRIUS 3RH2911-2FB11, which is the preferred replacement type.

What are the key dimensions of the 3RH1911-2FB11?

Width is 36.5 mm, height is 37.5 mm, and depth is 46 mm.

What type of terminals does the 3RH1911-2FB11 use?

Spring-loaded terminals for the auxiliary and control current circuits, accepting 2x (0.5... 1.5 mm²) with core end processing or 2x (0.5... 2.5 mm²) without.

Can the 3RH1911-2FB11 be mounted on a 3RT1015-1BB42 contactor?

Yes, it is designed for snap-on mounting onto Size S00 contactors and contactor relays, which includes the 3RT1015 series. The mounting footprint and interface are standard across the SIRIUS Size S00 family.

MPN
3RH1911-2FB11