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Siemens 3RH1911-1FA11 — Contactors

Siemens 3RH1911-1FA11 Auxiliary Switch Block, 1 NO + 1 NC, S

MPN3RH1911-1FA11

Siemens SIRIUS auxiliary switch block, 3RH1911-1FA11, 1 NO + 1 NC, screw terminals, snap-on mounting for size S00 contactors, AC-15 rated 1 A at 690 V.

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

Specifications

3RH1911-1FA11 — 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
3RH1911-1FA11 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1911-1FA11 — Connection & Mounting
ParameterValue
Mounting methodsnap-on mounting
3RH1911-1FA11 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
3RH1911-1FA11 — Mechanical
ParameterValue
Width36.5 mm
Height37.5 mm
Depth41.5 mm

Product details

Rated operational current is 10 A maximum, with voltage-dependent ratings: 6 A at 24 V AC/DC, 6 A at 125 V, 6 A at 230 V, 3 A at 400 V, and 0.3 A at 220 V. For the AC-15 utilization category at 690 V, the rated value is 1 A — this is the inductive switching rating for solenoid and contactor coils at that voltage. The block uses screw-type terminals accepting 2x (0.5... 1.5 mm²) or 2x (0.75... 2.5 mm²) with core-end processing, or 2x (20... 16) and 2x (18... 14) AWG. Mechanical service life is 10 million switching cycles typical, with contact reliability of 1 faulty switching per 100 million operations at 17 V, 1 mA.

Snap-on mounting directly onto the contactor or relay — no tools required. The block measures 36.5 mm wide, 37.5 mm high, and 41.5 mm deep, fitting the S00 footprint. The block is intended for use with SIRIUS contactor relays and power contactors of size S00.

Frequently asked questions

What replaces the 3RH1911-1FA11?

The preferred successor is the Siemens SIRIUS 3RH2911-1HA11 auxiliary switch block.

What is the AC-15 rating at 690 V?

The AC-15 rated operational current at 690 V is 1 A.

What wire sizes does the screw terminal accept?

The screw terminals accept 2x (0.5... 1.5 mm²) or 2x (0.75... 2.5 mm²) with ferrules, or 2x (20... 16) and 2x (18... 14) AWG.

MPN
3RH1911-1FA11