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Siemens Auxiliary Contact Block: 4NC, Front Mount - Siemens Auxiliary Contacts
SiemensSiemens Auxiliary Contacts

Siemens Auxiliary Contact Block: 4NC, Front Mount

The SIEMENS Auxiliary Contact Block (MPN 3RH29111FA04) is a front-mounted, 4NC auxiliary contact block designed for use with SIRIUS 3RT2 contactors. It features an S2 frame size and is manufactured by Siemens.

SKU 3G-OTH-38386

Brand
Siemens
Item
Auxiliary Contact Block: 4NC, Front Mount
Category
Siemens Auxiliary Contacts
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Technical Specifications

Siemens
Manufacturer Part Number
3RH29111FA04
Frame Size
S2
Compatible with Series
SIRIUS 3RT2 Contactors
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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SIEMENS Auxiliary Contact Block (MPN 3RH29111FA04) is a front-mounted, 4NC auxiliary contact block designed for use with SIRIUS 3RT2 contactors. It features an S2 frame size and is manufactured by Siemens.

Frequently Asked Questions

What is the SIEMENS 3RH29111FA04 auxiliary contact block used for?

The SIEMENS 3RH29111FA04 is a front-mounted auxiliary contact block with 4 normally closed (4NC) contacts. It is used with SIRIUS 3RT2 contactors to provide additional switching functions, such as status feedback or interlocking, in industrial motor control and automation systems.

What are the specifications of the SIEMENS 3RH29111FA04?

The SIEMENS 3RH29111FA04 is a 4NC auxiliary contact block with an S2 frame size. It is designed for front mounting and is compatible with SIRIUS 3RT2 contactors. The manufacturer part number is 3RH29111FA04, and it is manufactured by Siemens.

Where to buy the SIEMENS 3RH29111FA04 worldwide?

You can source the SIEMENS 3RH29111FA04 auxiliary contact block through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations, ensuring you receive genuine Siemens components for your SIRIUS 3RT2 contactors.

How to install the SIEMENS 3RH29111FA04 auxiliary contact block?

To install the SIEMENS 3RH29111FA04, mount it on the front of a compatible SIRIUS 3RT2 contactor using the provided clips. Ensure the contact block snaps securely into place and the 4NC terminals are wired according to your control circuit diagram. Always follow Siemens installation guidelines for safe operation.

Used in

Common applications for Siemens
District cooling plants — LME73 + RWF55 for condenser-water modulation
Inflight catering and food-processing steam boilers — LMG22 with SQN90 air-fuel cross-damper
Hospital steam-plant redundancy — LME41 with QRA2 UV flame detection for dual-fuel boilers
Semiconductor fab process heat — LME23 and SKP55 gas valves on hot-oil heater skids
Container-terminal reefer-deck heating — LMG22 retrofit onto legacy burner racks

Siemens Products

3G Electric supplies Siemens siemens auxiliary contacts. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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