Order number 3RH2911-1HA11 is a genuine Siemens part from the SIRIUS 3RH2 control relays / auxiliary switches range. Official description: auxiliary switch, on the front, 1 NO + 1 NC, .1/.2, .3/.4, –/–, –/–, current path: 1 NC, 1 NO, –, –, screw terminal, for contactors 3RT2 and contactor relays 3RH2.
They share the size S00 housing and accessories of the 3RT2 contactors, so the same snap-on auxiliary blocks and surge suppressors fit.
See our Siemens range.
Technical data
| Siemens order number | 3RH2911-1HA11 |
|---|---|
| Product type designation | 3RH29 |
| Ambient temperature (operation) | -25 … +60 °C |
| Dimensions (W x H x D) | 36 x 37.5 x 43.7 mm |
| Weight, approx. | 0.045 kg |
| Condition | New, original Siemens |
Features at a glance
- Auxiliary switch
- On the front
- 1 NO + 1 NC, .1/.2, .3/.4, –/–, –/–
- Current path: 1 NC
- 1 NO, –, —
- Screw terminal
- For contactors 3RT2 and contactor relays 3RH2
Typical applications
- Contact multiplication for PLC outputs
- Signalling and auxiliary functions on 3RT2 contactors
- Control circuits and interlocking
- Replacement of a worn relay or block
Compatibility and replacement
Check the coil voltage (for contactor relays) or the contactor size (for auxiliary blocks) against the old part before ordering.
Before you replace it
- Note the firmware version printed on the old unit; TIA Portal or LOGO! Soft Comfort must support it.
- Look for signs of overvoltage, water or heat damage in the cabinet so the new part does not fail for the same reason.
- Compare the full order number 3RH2911-1HA11 with the label on the old unit, including the last digits (they identify the version).
Frequently asked questions
Does it fit 3RT2 contactors?
3RH29 auxiliary switch blocks fit 3RT2 contactors of the sizes listed by Siemens in the data sheet.
What contacts does it have?
See the contact arrangement in the Siemens title and table above.
Do you supply larger quantities for projects?
Yes. For panel builders and plant projects we quote complete lists; send the bill of materials on WhatsApp or through the inquiry form.
Can I get a datasheet?
The official manufacturer datasheet is the source of the technical data above; we can send the PDF with the quotation on request.
How fast can you deliver, and is there a warranty?
Air shipping usually takes 5 to 7 days once the part is ready, to almost any country. Each part is new and original with a 1-year warranty. Message us on WhatsApp with the order number for a quotation.
Ordering tips
Send us the full order number from the label of the old part, or a clear photo of the label, together with the quantity you need. We check the number against the current manufacturer data before we quote and tell you if there is a newer replacement.
RendatSP ships from Yiwu, China, to factories worldwide; air delivery usually takes 5 to 7 days once the part is ready. The part is new and original with a 1-year warranty (shipping, payment and warranty). For a quotation, message us on WhatsApp with the order number and quantity. We also have agents in Saudi Arabia, Iraq, the UAE, Egypt, Oman, Libya, Morocco, Mauritania, Yemen, Algeria and Jordan.
