Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

Siemens Auxiliary Contact: 2NO, 10 A Max Current (AC), Side Mount - Siemens Auxiliary Contacts
SiemensSiemens Auxiliary Contacts

Siemens Auxiliary Contact: 2NO, 10 A Max Current (AC), Side Mount

The SIEMENS Auxiliary Contact (MPN 3RH29211DA20) is a side-mounted accessory for SIRIUS 3RH2 contactor relays, featuring 2 normally open (2NO) contacts and a maximum AC current rating of 10 A. This side-mount design…

SKU 3G-OTH-38500

Brand
Siemens
Item
Auxiliary Contact: 2NO, 10 A Max Current
Category
Siemens Auxiliary Contacts
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

Siemens
Manufacturer Part Number
3RH29211DA20
Compatible with Series
SIRIUS 3RH2 Contactor Relays
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The SIEMENS Auxiliary Contact (MPN 3RH29211DA20) is a side-mounted accessory for SIRIUS 3RH2 contactor relays, featuring 2 normally open (2NO) contacts and a maximum AC current rating of 10 A. This side-mount design integrates directly with compatible Siemens relay systems to expand switching functionality.

Frequently Asked Questions

What is the SIEMENS auxiliary contact 3RH29211DA20 used for?

The SIEMENS auxiliary contact 3RH29211DA20 is used to add two normally open (2NO) switching points to SIRIUS 3RH2 contactor relays. It expands control circuit functionality in industrial automation, motor control centers, and panel building applications where additional signal or interlock contacts are required.

What are the specifications of the SIEMENS 3RH29211DA20 auxiliary contact?

The SIEMENS 3RH29211DA20 is a side-mounted auxiliary contact block with 2 normally open (2NO) contacts. It has a maximum AC current rating of 10 A and is compatible with SIRIUS 3RH2 contactor relays. The side-mount design allows direct mechanical integration without additional wiring.

Where to buy the SIEMENS 3RH29211DA20 auxiliary contact worldwide?

You can source the SIEMENS 3RH29211DA20 auxiliary contact worldwide through 3G Electric. As a global industrial equipment distributor, 3G Electric handles full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on this Siemens SIRIUS series accessory.

How to install the SIEMENS 3RH29211DA20 auxiliary contact on a SIRIUS 3RH2 relay?

To install the SIEMENS 3RH29211DA20, first de-energize the SIRIUS 3RH2 contactor relay. Align the side-mount block with the designated slot on the relay housing and press firmly until it clicks into place. Secure any retaining clips if present. Verify mechanical operation before re-energizing the system.

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Similar products

Matched by specification & description
SIEMENS Auxiliary Contact: 2NO/2NC, 10 A Max Current (AC), Front Mount, Front-Mounted (MPN 3RH29111HA22). Key specifications — Frame Size: S3; Brand: SIEMENS; Compatible with Series: SIRIUS 3RT2 Contactors.
Siemens
SIEMENS Auxiliary Contact: 2NO/2NC, 10 A Max Current (AC), Front Mount, Front-Mounted (MPN 3RH29111HA22). Key specifications — Frame Size: S3; Brand: SIEMENS; Compatible with Series: SIRIUS 3RT2 Contactors.
SIEMENS Auxiliary Contact Block: 1NO/1NC, Side Mount, Side-Mounted (MPN 3RH29211DA11). Key specifications — Brand: SIEMENS; Compatible with Series: SIRIUS 3RH2 Contactor Relays.
Siemens
SIEMENS Auxiliary Contact Block: 1NO/1NC, Side Mount, Side-Mounted (MPN 3RH29211DA11). Key specifications — Brand: SIEMENS; Compatible with Series: SIRIUS 3RH2 Contactor Relays.
SIEMENS Auxiliary Contact Block: 1NO/1NC, Side Mount, Side-Mounted, 3RH29111DA11. Key specifications — Frame Size: S00; Brand: SIEMENS; Compatible with Series: SIRIUS 3RT2 Contactors.
Siemens
SIEMENS Auxiliary Contact Block: 1NO/1NC, Side Mount, Side-Mounted, 3RH29111DA11. Key specifications — Frame Size: S00; Brand: SIEMENS; Compatible with Series: SIRIUS 3RT2 Contactors.
SIEMENS Auxiliary Contact Block: 1NO/1NC, Front Mount, Front-Mounted (MPN 3RH29111MA11). Key specifications — Frame Size: S3; Brand: SIEMENS; Compatible with Series: SIRIUS 3RH2 Contactor Relays.
Siemens
SIEMENS Auxiliary Contact Block: 1NO/1NC, Front Mount, Front-Mounted (MPN 3RH29111MA11). Key specifications — Frame Size: S3; Brand: SIEMENS; Compatible with Series: SIRIUS 3RH2 Contactor Relays.
SIEMENS Auxiliary Contact: 1NO, 10 A Max Current (AC), Side Mount, Side-Mounted (MPN 49AB10). Key specifications — Brand: SIEMENS.
Siemens
SIEMENS Auxiliary Contact: 1NO, 10 A Max Current (AC), Side Mount, Side-Mounted (MPN 49AB10). Key specifications — Brand: SIEMENS.
SIEMENS Auxiliary Contact Block: 2NO/2NC, Front Mount, Front-Mounted (MPN 3RH29111FA22). Key specifications — Frame Size: S2; Brand: SIEMENS; Compatible with Series: SIRIUS 3RT2 Contactors.
Siemens
SIEMENS Auxiliary Contact Block: 2NO/2NC, Front Mount, Front-Mounted (MPN 3RH29111FA22). Key specifications — Frame Size: S2; Brand: SIEMENS; Compatible with Series: SIRIUS 3RT2 Contactors.

More from Siemens

View all Siemens parts
SIEMENS Auxiliary Contact: 2NC, 10 A Max Current (AC), Side Mount, Side-Mounted (MPN 3RH29211DA02). Key specifications — Brand: SIEMENS; Compatible with Series: SIRIUS 3RH2 Contactor Relays.
Siemens
SIEMENS Auxiliary Contact: 2NC, 10 A Max Current (AC), Side Mount, Side-Mounted (MPN 3RH29211DA02). Key specifications — Brand: SIEMENS; Compatible with Series: SIRIUS 3RH2 Contactor Relays.
SIEMENS Auxiliary Contact: 3NO/1NC, 10 A Max Current (AC), Front Mount, Front-Mounted (MPN 3RH29111HA31). Key specifications — Frame Size: S3; Brand: SIEMENS; Compatible with Series: SIRIUS 3RT2 Contactors.
Siemens
SIEMENS Auxiliary Contact: 3NO/1NC, 10 A Max Current (AC), Front Mount, Front-Mounted (MPN 3RH29111HA31). Key specifications — Frame Size: S3; Brand: SIEMENS; Compatible with Series: SIRIUS 3RT2 Contactors.
SIEMENS Auxiliary Switch: 1NO, Front Mount, Front-Mounted (MPN 3RH1921-1CD10). Key specifications — Frame Size: S0; Brand: SIEMENS; Compatible with Series: SIRIUS 3RT1 Contactors.
Siemens
SIEMENS Auxiliary Switch: 1NO, Front Mount, Front-Mounted (MPN 3RH1921-1CD10). Key specifications — Frame Size: S0; Brand: SIEMENS; Compatible with Series: SIRIUS 3RT1 Contactors.
SIEMENS Auxiliary Switch: 2NC, Front Mount, Front-Mounted (MPN 3RH29112NF02). Key specifications — Frame Size: S0; Brand: SIEMENS; Compatible with Series: SIRIUS 3RH2 Contactor Relays.
Siemens
SIEMENS Auxiliary Switch: 2NC, Front Mount, Front-Mounted (MPN 3RH29112NF02). Key specifications — Frame Size: S0; Brand: SIEMENS; Compatible with Series: SIRIUS 3RH2 Contactor Relays.
SIEMENS Auxiliary Contact: 2NO/2NC, 10 A Max Current (AC), Side Mount, Side-Mounted (MPN 49AB22). Key specifications — Brand: SIEMENS.
Siemens
SIEMENS Auxiliary Contact: 2NO/2NC, 10 A Max Current (AC), Side Mount, Side-Mounted (MPN 49AB22). Key specifications — Brand: SIEMENS.
SIEMENS Auxiliary Switch: 1NO/1NC, 90 A Max Current (AC) (MPN 49CE42SPDT). Key specifications — Brand: SIEMENS.
Siemens
SIEMENS Auxiliary Switch: 1NO/1NC, 90 A Max Current (AC) (MPN 49CE42SPDT). Key specifications — Brand: SIEMENS.
SIEMENS Auxiliary Contact: 1NO/1NC, 10 A Max Current (AC), Side Mount, Side-Mounted (MPN 49AB11). Key specifications — Brand: SIEMENS.
Siemens
SIEMENS Auxiliary Contact: 1NO/1NC, 10 A Max Current (AC), Side Mount, Side-Mounted (MPN 49AB11). Key specifications — Brand: SIEMENS.
SIEMENS Auxiliary Contact Block (MPN 3RV29011D). Key specifications — Brand: SIEMENS; Compatible with Series: SIRIUS 3RV2 Motor Starter Protectors.
Siemens
SIEMENS Auxiliary Contact Block (MPN 3RV29011D). Key specifications — Brand: SIEMENS; Compatible with Series: SIRIUS 3RV2 Motor Starter Protectors.