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SIEMENS 3RH29211DA20 auxiliary contact side mount 2NO 10A 24V DC

SIEMENS

SIEMENS 3RH29211DA20 Auxiliary Contact 10A 24V DC Side Mount 2NO

SKU CH-5KYH-9GJ7G

Side-mount auxiliary contact adds two normally-open circuits rated 10 A at 24 V DC for S00–S3 contactors

  • Side-mount design fits 3RT2 and 3RH2 contactors directly
  • Two normally-open contacts provide 10 A switching at 24 V DC
  • Zero normally-closed contacts keeps the circuit simple
  • Compatible with starter sizes 00 through 3
  • Part number 3RH29211DA20 identifies the exact auxiliary block

Auxiliary Contact for 3RT2 and 3RH2 Contactors

This SIEMENS 3RH29211DA20 auxiliary contact adds two normally-open circuits to compatible contactors. It mounts on the side of 3RT2 and 3RH2 frame sizes S00 through S3. The unit is rated for 10 A at 24 V DC. It provides additional control signalling without replacing the main contactor.

Side-Mount Upgrade for Existing Starters

The block attaches to the side of installed 3RT2 or 3RH2 contactors, avoiding a full unit swap. It is worth adding when extra normally-open contacts are required for interlocking or status feedback. The maximum of two contact blocks per starter limits further expansion. No normally-closed contacts are included in this model.

Build Integration and Space Considerations

Side mounting keeps the starter footprint narrow while adding control capacity. The 24 V DC coil voltage must match the control circuit supply. Two normally-open contacts free up logic inputs on PLCs or relays for auxiliary functions. Ensure the starter frame size falls within the S00 to S3 range before ordering.

How it compares

Measured against everything we stock in Contactors, Relays & Motor Starters, at today’s prices. Recalculated every night.

Price $25.99
Cheaper than about 77% of the 1,098 comparable items (median $61.99).

Specifications

Product
Brand nameSIEMENS

Questions about this item

Does the 3RH29211DA20 side-mount auxiliary contact fit the 3RT2 and 3RH2 contactors in the S00-S3 frame range?

Yes, it is designed for side mounting on 3RT2 and 3RH2 contactors from starter size 00 up to size 3.

How do I install the 3RH29211DA20 auxiliary contact and what step is often missed?

Snap the block onto the side of the compatible contactor until it clicks; the step often missed is verifying the mechanical latch is fully engaged before wiring the two normally open contacts.

When will the 3RH29211DA20 auxiliary contact need replacement in a 24V DC circuit?

Replace the block when the two normally open contacts no longer make reliable 10 A connections at 24 V DC, typically after the rated electrical endurance is reached.

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