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Siemens 3RH1911-2HA12 4-Pole Auxiliary Switch Block

Siemens 3RH1911-2HA12 4-pole auxiliary switch block for motor contactors.

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ManufacturerSiemens

Part number3RH1911-2HA12

Poles 4

Contacts 1 NO + 2 NC

Terminal Type Spring-type

Standard EN 50012

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CAGE: 9NK75

Spring-type terminal 1 NO + 2 NC configuration EN 50012 compliant Designed for motor contactors Phased-out product

Product description

The Siemens 3RH1911-2HA12 is a 4-pole auxiliary switch block specifically designed for Siemens motor contactors, featuring spring-type terminals. It is configured with 1 normally open (NO) and 2 normally closed (NC) contacts according to EN 50012 standards. This product is phased out, with the SIRIUS 3RH2 series, specifically the 3RH2911-2HA12, being its preferred successor.

This auxiliary switch block is used to add supplementary functions to motor contactors, such as status feedback, control interlocks, or fault signaling. It is widely applied in motor control centers, machine tools, and other industrial applications where reliable motor operation and control are paramount.

Stanlo Automation, a veteran-owned supplier of surplus automation parts, offers the Siemens 3RH1911-2HA12. We provide solutions for locating and acquiring discontinued components essential for maintaining your industrial equipment.

Technical specifications

Poles	4
Contacts	1 NO + 2 NC
Terminal Type	Spring-type
Standard	EN 50012
Application	Motor Contactors

Common applications

Motor control centers

Machine tools

Industrial automation

Conveyor systems

Pump controls

Compatible systems

Siemens 3RH1 motor contactors

Also known as

Siemens 3RH1911-2HA12 auxiliary contact block Siemens motor contactor auxiliary switch

Replaces / compatible with

This part is a phased-out product. The preferred successor is the Siemens 3RH2911-2HA12, designed for motor contactors.

Technical note

Expert tip

The EN 50012 standard for this block ensures compatibility with specific Siemens motor contactor series, simplifying integration into motor control circuits.

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Frequently asked questions

What is the contact configuration of the Siemens 3RH1911-2HA12 auxiliary switch block?

The Siemens 3RH1911-2HA12 auxiliary switch block features a 1 normally open (NO) and 2 normally closed (NC) contact configuration, utilizing spring-type terminals.