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Siemens 3RH2911-2HA31 Front-Mount Auxiliary Switch - 3NO/1NC

Siemens 3RH2911-2HA31 front-mount auxiliary switch with 3NO/1NC contacts.

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ManufacturerSiemens

Part number3RH2911-2HA31

Contact Configuration 3 NO + 1 NC

Mounting Front

Terminals Spring-loaded

Compatibility 3RT2 Contactors, 3RH2 Contactor Relays

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12-month warranty

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Veteran-owned

CAGE: 9NK75

3 Normally Open (NO) contacts 1 Normally Closed (NC) contact Spring-loaded terminals Front snap-on mounting For 3RT2 and 3RH2 devices

Product description

The Siemens 3RH2911-2HA31 is a front-mounted auxiliary switch designed to expand the control capabilities of SIRIUS 3RT2 power contactors and 3RH2 contactor relays. It features a contact configuration of 3 Normally Open (NO) and 1 Normally Closed (NC) instantaneous contacts, utilizing spring-loaded terminal technology for fast, vibration-proof, and maintenance-free wiring.

This auxiliary switch is ideal for applications requiring additional signaling, interlocking, or control circuit logic in industrial automation, motor control centers, and machine building. Its compatibility with various sizes of 3RT2 contactors and 3RH2 relays makes it a versatile solution for diverse industrial needs.

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Technical specifications

Contact Configuration	3 NO + 1 NC
Mounting	Front
Terminals	Spring-loaded
Compatibility	3RT2 Contactors, 3RH2 Contactor Relays
Series	SIRIUS 3RH29

Common applications

Motor control

Control panel building

Industrial automation

Machine safety circuits

Signaling and interlocking

Compatible systems

Siemens 3RT2.1 Siemens 3RT2.2 Siemens 3RT2.3 Siemens 3RT2.4 Siemens 3RH21 Siemens 3RH24

Also known as

Siemens 3RH29112HA31 SIRIUS Auxiliary Contact 3RH2911-2HA31 Auxiliary Block

Replaces / compatible with

This auxiliary switch expands the functionality of Siemens 3RT2 contactors and 3RH2 contactor relays.

Technical note

Expert tip

This auxiliary switch is designed for front mounting on Siemens 3RT2 contactors and 3RH2 contactor relays, regardless of size, and mounts tool-free.

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Frequently asked questions

What type of terminals does the Siemens 3RH2911-2HA31 auxiliary switch use?

The Siemens 3RH2911-2HA31 auxiliary switch utilizes spring-loaded terminals. This technology allows for fast, vibration-proof, and maintenance-free wiring compared to traditional screw terminals.