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Siemens 3RH2911-2HA20-ZX95 — Contactors

Siemens 3RH2911-2HA20-ZX95 SIRIUS Auxiliary Switch, 2 NO, Sp

MPN3RH2911-2HA20-ZX95
Active

Siemens SIRIUS auxiliary switch block, 3RH2911-2HA20-ZX95, 2 NO front-mounted contacts, 10 A max, spring-loaded terminals, snap-on DIN rail mounting.

Siemens 3RH2911-2HA20-ZX95 datasheet (PDF)
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

3RH2911-2HA20-ZX95 — 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
3RH2911-2HA20-ZX95 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH2911-2HA20-ZX95 — Connection & Mounting
ParameterValue
Mounting methodsnap-on mounting
3RH2911-2HA20-ZX95 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
3RH2911-2HA20-ZX95 — Mechanical
ParameterValue
Width36 mm
Height41.5 mm
Depth47.7 mm

Product details

The Siemens SIRIUS 3RH2911-2HA20-ZX95 is a front-mounted auxiliary switch block designed specifically for 3RT2 power contactors and 3RH2 contactor relays. It adds two normally-open (NO) instantaneous contacts to the front of the device, expanding the signaling or interlocking capability of the contactor assembly.

The contacts are rated for a maximum of 10 A, but the real-world switching capacity depends on voltage and load type. At 24 V AC-15 (the standard for contactor coil control circuits), it switches 6 A; at 230 V AC-15, also 6 A; at 400 V AC-15, 3 A.

Wiring and integration details

Termination is via spring-loaded terminals — no screwdriver needed for the connection, just strip the wire and push it in. Accepts 2x (0.5 to 1.5 mm²) with ferrule, or 2x (0.5 to 2.5 mm²) without core-end processing. AWG equivalent is 2x (20 to 14). The block dimensions are 36 mm wide × 47.7 mm deep × 41.5 mm high.

The 3RH2911-2HA20-ZX95 is a standard catalog item for Siemens SIRIUS, so it can be specified into new BOMs with confidence.

Frequently asked questions

What is the closest functional alternative to this part?

The 3RH2422-1AB00 is another SIRIUS auxiliary switch block, but it is a different form factor (side-mount vs. front-mount) and has a different contact configuration. The 3RH2911-2HA20-ZX95 is specifically designed to mount on the front of 3RT2/3RH2 devices, so a direct drop-in replacement without rewiring would require another front-mount block from the same series.

What does the note 'with 3RH2' mean in the specification?

It indicates this auxiliary switch block is designed for use with Siemens 3RH2 contactor relays. The 'with 3RH2' note confirms compatibility with that specific contactor relay series, in addition to 3RT2 power contactors.

What is the physical depth of this component?

The depth is 47.7 mm. Combined with the 36 mm width and 41.5 mm height, it adds minimal projection beyond the host contactor's front face.

Will this part drop into a panel specified around the 3RH2422-1AB00 without rewiring?

No, not without mechanical adaptation. The 3RH2422-1AB00 is a side-mount auxiliary contact block, while this part is a front-mount block. The mounting location and wiring orientation differ, so the panel layout and wiring harness would need to be adjusted.

What compliance documentation is available for this part?

As a Siemens SIRIUS product, it carries CE marking for the European market and is designed to meet IEC/EN 60947 standards for low-voltage switchgear. Specific RoHS and REACH declarations are available from Siemens on request. UL/CSA listings are typical for the SIRIUS family but should be verified against the specific variant's markings.

MPN
3RH2911-2HA20-ZX95