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Siemens 3RH1911-1FA31-ZW97 — Contactors

Siemens 3RH1911-1FA31-ZW97 Auxiliary Switch Block, 3 NO + 1

MPN3RH1911-1FA31-ZW97

Siemens SIRIUS auxiliary switch block, 3RH1911-1FA31-ZW97, 3 NO + 1 NC per EN 50005, screw terminals, size S00, 10 A maximum, snap-on mounting.

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

3RH1911-1FA31-ZW97 — 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
3RH1911-1FA31-ZW97 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1911-1FA31-ZW97 — Connection & Mounting
ParameterValue
Mounting methodsnap-on mounting
3RH1911-1FA31-ZW97 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
3RH1911-1FA31-ZW97 — Mechanical
ParameterValue
Width36.5 mm
Height37.5 mm
Depth41.5 mm

Product details

It provides 3 normally open (NO) and 1 normally closed (NC) contact configuration per EN 50005, wired via screw-type terminals. The block snaps onto the contactor without tools, adding auxiliary contacts for status feedback, interlocking, or control logic extension.

Rated at 10 A maximum, with derated currents per voltage level: 6 A at 24 V, 6 A at 125 V, 6 A at 230 V, and 3 A at 400 V. The AC-15 rating at 690 V is 1 A, which governs switching of electromagnetic loads like contactor coils in higher-voltage control circuits. The insulation voltage is 690 V at pollution degree 3, and surge voltage resistance is 6 kV — adequate for industrial control panels with standard overvoltage category III. Mechanical service life is 10 million switching cycles typical.

Physical integration and environment

Dimensions: 36.5 mm wide, 37.5 mm high, 41.5 mm deep. Snap-on mounting to the contactor — no DIN rail required for the block itself, though the contactor typically mounts on a 35 mm rail. IP20 protection on the front, suitable for enclosed panel use. Screw terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) with core-end processing, or 2x (20 to 16) and 2x (18 to 14) AWG.

Frequently asked questions

What replaces the 3RH1911-1FA31-ZW97?

The official successor is the SIRIUS 3RH2 series auxiliary switch blocks. Verify the contact configuration and mounting compatibility for your specific contactor frame.

Where can I buy the 3RH1911-1FA31-ZW97 and get a price?

This part is sourced through independent distribution channels. Submit an RFQ for current availability and pricing — confirmed at quote time.

What is the contact configuration of this auxiliary switch block?

It provides 3 normally open (NO) and 1 normally closed (NC) contacts, arranged per EN 50005.

What is the maximum current rating?

The maximum continuous current is 10 A, with derated values at higher voltages: 6 A at 24 V, 6 A at 230 V, and 3 A at 400 V.

MPN
3RH1911-1FA31-ZW97