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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.

Highlights

  • 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

Specifications

BrandSIEMENS

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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