Siemens 3RH1911-1GA22 Auxiliary Contact Block

Product Description

The SIEMENS 3RH1911-1GA22 is a front-mount auxiliary contact block designed for use with Siemens contactor and relay assemblies. Auxiliary contact blocks expand the switching capacity of a base contactor or control relay by adding supplemental contact points for control-circuit signaling, interlocking, or status indication. This block mounts directly to the front face of compatible Siemens control devices, keeping wiring organized within the panel footprint. Licensed electricians and industrial controls technicians are the primary installers for this type of component in motor control centers, panel boards, and machine control enclosures.

Front-mount auxiliary contact blocks like the 3RH1911-1GA22 are used in commercial and industrial electrical installations where additional control-circuit contacts are required beyond what the base contactor provides. Typical applications include motor starter panels, conveyor control systems, HVAC unit control panels, and process automation enclosures. This block is suited for low-voltage control circuit applications where reliable auxiliary switching is critical to system interlock and monitoring logic.

Key Features

• Front-mount design attaches directly to the face of compatible Siemens contactors and control relays
• Provides supplemental auxiliary contacts for control-circuit interlocking and status signaling
• Compact form factor preserves panel space in crowded enclosures
• Designed for low-voltage control circuit integration

Compatibility

Designed as an OEM-style front-mount auxiliary contact block for compatible Siemens contactor and control relay product families. Consult Siemens product documentation to confirm fitment with the specific contactor or relay series in use.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the NEC and any applicable local codes. De-energize and lock out the panel or motor control center before attaching or removing auxiliary contact blocks. Snap the block onto the front face of the base device per the manufacturer mounting instructions before making any control-circuit wiring connections. Verify all contact ratings are appropriate for the control-circuit voltage and current before energizing the system.

Technical Specifications

• UPC: 04089256803
• Mount Type: Front mount
• Component Type: Auxiliary contact block

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: 3RH1911-1GA22