Match the documented base device
For contactors 3RT2.1. Check the exact base device, other fitted accessories and available mounting space before assembly. The family statement does not mean every possible contact-block combination is permitted.
SIEMENS
3RH2911-2DA11
Siemens 3RH2911-2DA11 Auxiliary Contact Block, 1 NO + 1 NC, Lateral Mount
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USDAvailability on request
Estimated 2–8 weeks; confirm by quote
- Condition
- Original brand new
- Warranty
- 12 months
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KEY SPECIFICATIONS
- Contact arrangement
- 1 NO + 1 NC
- Mounting position
- Lateral
- Terminal type
- spring-loaded terminal
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PRODUCT DATA
Specifications
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| SKU / model | 3RH2911-2DA11 |
|---|---|
| Brand | SIEMENS |
| Series | SIRIUS 3RH29 |
| Contact arrangement | 1 NO + 1 NC |
| Mounting position | Lateral |
| Terminal type | spring-loaded terminal |
| Manufacturer application scope | for contactors 3RT2.1 |
| Contact sequence | 1 NC, 1 NO |
| Terminal markings | on the left: 41/42, 53/54, on the right: 21/22, 33/34 |
| Device dimensions (W × H × D) | 10 × 64.8 × 66 mm |
| Manufacturer part number | 3RH2911-2DA11 |
| Net weight | 0.046 kg |
| Package dimensions (L × W × H) | 72 × 68 × 20 mm |
REFERENCE MATERIAL
Documents
Check the document’s model and revision before use.
Description
3RH2911-2DA11 is a lateral-mounted Siemens SIRIUS auxiliary contact block with 1 NO + 1 NC. It uses spring-loaded terminal connections. Select the contact logic, mounting arrangement and permitted base device together; contact count alone is insufficient.
Compare contact blocks by mounting and coding
The highlighted models address the main selection differences. Each link opens a separate product. Matching one specification does not establish interchangeability; use the complete order number and installation requirements.
This product
3RH2911-2DA11
- Mounting position: Lateral
- Contact arrangement: 1 NO + 1 NC
- Terminal type: spring-loaded terminal
- Manufacturer application scope: for contactors 3RT2.1
Different terminal type
3RH2911-1DA11
- Mounting position: Lateral
- Contact arrangement: 1 NO + 1 NC
- Different from this product: Terminal type: screw terminal
- Manufacturer application scope: for contactors 3RT2.1
Different base-device range
3RH2921-2DA11
- Mounting position: Lateral
- Contact arrangement: 1 NO + 1 NC
- Terminal type: spring-loaded terminal
- Different from this product: Manufacturer application scope: for contactors 3RT2 and contactor relays 3RH2
Different terminal type
3RH2911-4DA11
- Mounting position: Lateral
- Contact arrangement: 1 NO + 1 NC
- Different from this product: Terminal type: ring cable lug connection
- Manufacturer application scope: for contactors 3RT2.1
More configurations to consider
- 3RH2921-1DA11 — Lateral; 1 NO + 1 NC; screw terminalView product →
- 3RH2911-2HA11 — Front; 1 NO + 1 NC; spring-loaded terminalView product →
- 3RH2911-2FA22 — Front; 2 NO + 2 NC; spring-loaded terminalView product →
- 3RH2911-2NF02 — Front; 2 NC; spring-loaded terminalView product →
- 3RH2911-1HA11 — Front; 1 NO + 1 NC; screw terminalView product →
- 3RH2911-1XA22-0MA0 — Front; 2 NO + 2 NC; screw terminalView product →
- 3RH2911-1XA40-0MA0 — Front; 4 NO; screw terminalView product →
- 3RH2911-1HA13 — Front; 1 NO + 3 NC; screw terminalView product →
Selection and installation checks
Follow the actual terminal markings
The manufacturer lists on the left: 41/42, 53/54, on the right: 21/22, 33/34. Contact sequence: 1 NC, 1 NO. Match these markings to the control drawing; do not transfer wire positions from a block with the same NO/NC count but different numbering.
Keep auxiliary and main-circuit duties separate
This block adds auxiliary switching paths to a suitable base device. It is not a standalone coil-operated relay, a motor power pole or a protective device. Select each switched load using the auxiliary-contact electrical ratings and the required control-circuit duty.
Keep left and right numbering distinct
The catalogue gives different terminal numbers for left-side and right-side use. Check which side is available on the installed device and update the circuit identification accordingly. A front-mounted block is a different mechanical arrangement.
Questions about this configuration
Is a contactor or relay included?
This order number identifies the auxiliary contact block. The base contactor or contactor relay is a separate product; no combined package is established here.
Do matching NO/NC counts prove compatibility?
No. This model also requires lateral mounting, the stated base-device scope, suitable connections and the correct contact numbering.
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