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Siemens Auxiliary Contact: 3NO/1NC, 10 A Max Current (AC), Front Mount - Siemens Auxiliary Contacts
SiemensSiemens Auxiliary Contacts

Siemens Auxiliary Contact: 3NO/1NC, 10 A Max Current (AC), Front Mount

The SIEMENS Auxiliary Contact (MPN 3RH29111HA31) is a front-mounted auxiliary contact block with a 3NO/1NC contact configuration and a maximum current rating of 10 A (AC). Designed for Frame Size S3, it is compatible…

SKU 3G-OTH-38553

Brand
Siemens
Item
Auxiliary Contact: 3NO/1NC, 10 A Max Current
Category
Siemens Auxiliary Contacts
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

Siemens
Manufacturer Part Number
3RH29111HA31
Type
Front Mount, Front-Mounted
Frame Size
S3
Max Current (AC)
10 A
Compatible with Series
SIRIUS 3RT2 Contactors

Technical Documents

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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SIEMENS Auxiliary Contact (MPN 3RH29111HA31) is a front-mounted auxiliary contact block with a 3NO/1NC contact configuration and a maximum current rating of 10 A (AC). Designed for Frame Size S3, it is compatible with the SIRIUS 3RT2 series of contactors from Siemens.

Frequently Asked Questions

What is the SIEMENS 3RH29111HA31 auxiliary contact used for?

The SIEMENS 3RH29111HA31 auxiliary contact block provides additional signal switching for SIRIUS 3RT2 contactors. Its 3NO/1NC configuration is used in motor control and automation circuits to indicate contactor status or interlock devices, supporting reliable industrial control panel operation.

What are the specifications of the SIEMENS 3RH29111HA31 auxiliary contact?

This SIEMENS auxiliary contact has a 3NO/1NC contact configuration, a maximum AC current rating of 10 A, and is designed for Frame Size S3. It is a front-mounted block compatible with SIRIUS 3RT2 contactors. The manufacturer part number is 3RH29111HA31.

Where to buy the SIEMENS 3RH29111HA31 auxiliary contact worldwide?

3G Electric supplies the SIEMENS 3RH29111HA31 auxiliary contact to customers worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this front-mounted auxiliary contact block for SIRIUS 3RT2 contactors to your facility.

How to install the SIEMENS 3RH29111HA31 auxiliary contact on a SIRIUS 3RT2 contactor?

Install the SIEMENS 3RH29111HA31 auxiliary contact by snapping it onto the front of a SIRIUS 3RT2 contactor of Frame Size S3. Ensure the contactor is de-energized, align the block with the mounting slots, and press firmly until it locks. Wire according to the 3NO/1NC terminal markings.

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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Compatible alternatives & equivalents

Cross-referenced by specification & description
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Front-mounted auxiliary contact block with one normally open and one normally closed contact. Designed for Frame Size S3, compatible with SIRIUS 3RT2 series contactors. Used to add signal or control contacts for monitoring or interlocking in motor control circuits
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Front-mounted auxiliary contact block with 2 normally open and 2 normally closed contacts. Designed for use with SIRIUS 3RT2 contactors of frame size S2. Provides additional switching contacts for signaling, interlocking, or status feedback in motor control and automation systems
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Front-mounted auxiliary contact block with 1 normally open and 1 normally closed contact. Designed for frame size S0 and compatible with SIRIUS 3RT2 contactors. Provides additional switching contacts for control and signaling in motor control circuits

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The Siemens 75AF14 auxiliary contact kit provides one normally open (1NO) contact rated at 10 A AC. It is used for signaling or control in industrial motor starters, contactors, and switchgear, commonly applied in manufacturing, HVAC, and process control systems to monitor equipment status
Front-mounted auxiliary contact block with one normally open and one normally closed contact. Designed for use with SIRIUS 3RH2 contactor relays, frame size S3. Used to add signaling or control contacts in motor control panels and automation circuits
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Front-mounted auxiliary contact block with one normally open and one normally closed contact. Designed for use with SIRIUS 3RH2 contactor relays, frame size S3. Used to add signaling or control contacts in motor control panels and automation circuits
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