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Siemens 3RH2911-1HA12 Front Mount Auxiliary Switch - 1 NO + 2 NC

Siemens 3RH2911-1HA12 Front Mount Auxiliary Switch - 1 NO, 2 NC

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ManufacturerSiemens

Part number3RH2911-1HA12

Contacts 1 NO, 2 NC

Mounting Front

Terminals Screw

Compatibility 3RT2 (S00-S2), 3RH2

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Veteran-owned

CAGE: 9NK75

1 Normally Open (NO) + 2 Normally Closed (NC) Contacts Front Mounting Screw Terminals Snap-on Installation Compatible with 3RT2 and 3RH2

Product description

The Siemens 3RH2911-1HA12 is a front-mounting auxiliary switch block that expands control functionality by adding one Normally Open (NO) and two Normally Closed (NC) contacts. It features secure screw terminals and a snap-on design for easy installation onto the front of Siemens SIRIUS 3RT2 contactors and 3RH2 contactor relays.

This mixed-contact auxiliary switch is ideal for complex control logic, enabling more sophisticated interlocking, status signaling, and safety interlocks. The NO contact closes and the NC contacts open when the main contactor or relay is energized. It offers broad compatibility with 3RT2 contactors (sizes S00 to S2) and 3RH2 contactor relays.

Stanlo Automation, a veteran-owned surplus parts distributor, provides the Siemens 3RH2911-1HA12 auxiliary switch. We are dedicated to supplying reliable industrial automation components, offering a valuable resource for your MRO needs and ensuring your equipment operates efficiently.

Technical specifications

Contacts	1 NO, 2 NC
Mounting	Front
Terminals	Screw
Compatibility	3RT2 (S00-S2), 3RH2
Current Rating	10A AC-12, 6A AC-15

Common applications

Motor Control

Control Circuits

Interlocking

Safety Interlocks

Automation Systems

Status Indication

Compatible systems

Siemens 3RT2 (S00-S2) Siemens 3RH2

Also known as

Siemens 3RH2911-1HA12 Aux Contact Siemens Contactor Relay Auxiliary Block

Replaces / compatible with

This auxiliary switch is designed for use with Siemens SIRIUS 3RT2 contactors and 3RH2 contactor relays.

Technical note

Expert tip

The snap-on mounting design simplifies the installation of this auxiliary switch onto the front of Siemens 3RT2 contactors and 3RH2 contactor relays, requiring no tools.

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Frequently asked questions

What is the combined contact configuration of the Siemens 3RH2911-1HA12?

The Siemens 3RH2911-1HA12 auxiliary switch block features a mixed configuration of one Normally Open (NO) contact and two Normally Closed (NC) contacts. This allows for versatile control logic in automation systems.