Siemens 3RH2140-1BB40 (SIRIUS 3RH2 control relays / auxiliary switches): contactor relay, 4 NO, 24 V DC, screw terminal, frame size S00.
SIRIUS 3RH2 contactor relays and auxiliary switch blocks are used in control circuits to multiply contacts, interlock starters and interface PLC outputs with higher-power coils.
See our Siemens range.
Technical data
| Siemens order number | 3RH2140-1BB40 |
|---|---|
| Product type designation | 3RH2 |
| Ambient temperature (operation) | -25 … +60 °C |
| Dimensions (W x H x D) | 45 x 57.5 x 73 mm |
| Weight, approx. | 0.258 kg |
| Condition | New, original Siemens |
Main features
- Contactor relay
- 4 NO
- 24 V DC
- Screw terminal
- Frame size S00
Typical applications
- Replacement of a worn relay or block
- Signalling and auxiliary functions on 3RT2 contactors
- Contact multiplication for PLC outputs
- Control circuits and interlocking
Compatibility and replacement
Check the coil voltage (for contactor relays) or the contactor size (for auxiliary blocks) against the old part before ordering.
Replacement checklist
- Compare the full order number 3RH2140-1BB40 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.
- Look for signs of overvoltage, water or heat damage in the cabinet so the new part does not fail for the same reason.
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.
Is it new and original?
Yes. We supply new, original parts in the manufacturer packaging, with a 1-year warranty.
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.
How to order
Message us the order number and quantity. For breakdowns, tell us the delivery address and we will offer the fastest shipping option. If the exact part is discontinued, we confirm the official successor before quoting.
Every part RendatSP supplies is new and original, carries a 1-year warranty and ships worldwide by air in 5 to 7 days once ready (shipping, payment and warranty). Send us the order number and quantity on WhatsApp or through the inquiry form and we will quote the same working day. Agents in Saudi Arabia, Iraq, the UAE, Egypt, Oman, Libya, Morocco, Mauritania, Yemen, Algeria and Jordan.
