Order number 3RH2911-1FA22 is a genuine Siemens part from the SIRIUS 3RH2 control relays / auxiliary switches range. Official description: auxiliary switch, on the front, 2 NO + 2 NC, .3/.4, .1/.2, .1/.2, .3/.4, current path: 1 NO, 1 NC, 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 | 3RH2911-1FA22 |
|---|---|
| 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 kg |
| Condition | New, original Siemens |
Features at a glance
- Auxiliary switch
- On the front
- 2 NO + 2 NC, .3/.4, .1/.2, .1/.2, .3/.4
- Current path: 1 NO
- 1 NC
- 1 NC
- 1 NO
- Screw terminal
- For contactors 3RT2 and contactor relays 3RH2
Typical applications
- Control circuits and interlocking
- Signalling and auxiliary functions on 3RT2 contactors
- Contact multiplication for PLC outputs
- 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
- Back up the program and parameters from the old device if it still runs.
- Compare the full order number 3RH2911-1FA22 with the label on the old unit, including the last digits (they identify the version).
- Check the supply voltage and wiring of the old unit before installing the new one.
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.
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.
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.
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.
Before you order
Compare the complete order number on the old unit with this page, including the suffix: in most ranges the last characters set the coil voltage, current range or version. If the label is worn, send us a photo and we will identify the part.
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.
