3RH29112FC22 | auxiliary switch, on the front, 2 NO + 2 NC, 22 U, .7/.8, .7/.8, .5/.6, .5/.6, current path: 1 NO (leading), 1 NO (leading), 1 NC (lagging), 1 NC (lagging), springloaded terminal, for contactors 3RT2 and contactor relays 3RH2 Siemens

Name: 3RH29112FC22 | auxiliary switch, on the front, 2 NO + 2 NC, 22 U, .7/.8, .7/.8, .5/.6, .5/.6, current path: 1 NO (leading), 1 NO (leading), 1 NC (lagging), 1 NC (lagging), springloaded terminal, for contactors 3RT2 and contactor relays 3RH2 Siemens - myelectric.in
Brand: Siemens
SKU: 3RH29112FC22
Price: 2265.50 INR
Availability: OutOfStock

SKU: 3RH29112FC22

Original price was: ₹4,925.00.Current price is: ₹2,265.50. Excl. GST

Out of stock

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The Siemens 3RH29112FC22 is a contactor, engineered for motor control and switching in demanding Indian and international installations. Buy the 3RH29112FC22 | auxiliary switch, on the front, 2 NO + 2 NC, 22 U, .7/.8, .7/.8, .5/.6, .5/.6, current path: 1 NO (leading), 1 NO (leading), 1 NC (lagging), 1 NC (lagging), springloaded terminal, for contactors 3RT2 and contactor relays 3RH2 Siemens online at myelectric.in with GST invoice, genuine-product assurance, and fast delivery across India — bulk and worldwide export enquiries welcome.

📋 Technical Specifications

Parameter	Value
Brand	Siemens
Part Number / SKU	3RH29112FC22
Category	Contactor
Series / Model	3RT
Contact Configuration	2 NO + 2 NC
Utilisation Category	AC-3 (motor duty) / AC-1 (resistive)
Rated Frequency	50/60 Hz
Coil Operating Range	0.8–1.1 × rated coil voltage (Uc)
Mounting	35mm DIN rail or screw fixing
Standard	IEC 60947-4-1, IS 13947
Certifications	BIS certified, CE, cULus (select models)

⚡ Key Features

Manufactured to IEC 60947-4-1 / IS 13947-4-1 — complies with the applicable Indian BIS and IEC international standards for this product category.
BIS certified, CE, cULus (select models) — meets Indian regulatory requirements for use in government, commercial, and industrial electrical installations.
Genuine authorised Siemens product — sourced directly from the official distribution network with full manufacturer traceability and warranty.
GST invoice provided for India orders — valid for corporate procurement, government project orders, and public tender supply via myelectric.in.
Worldwide export available — UAE, Singapore, UK, USA, Sri Lanka & more. Contact +91 94814 00316 for bulk pricing and international shipping.

❓ Frequently Asked Questions

Q: What does the 2 NO + 2 NC contact configuration on the 3RH29112FC22 mean?

A: This device has both Normally Open (NO) and Normally Closed (NC) contacts. NO contacts close when the device operates (energised/tripped); NC contacts open. This allows both start-interlock and stop-interlock circuits from a single device.

Q: Can the 3RH29112FC22 be used for reversing duty (forward/reverse motor control)?

A: Contactors used for reversing must be wired with two contactors interlocked so only one can energise at a time. The Siemens 3RT provides mechanical interlock kits that physically prevent both contactors from closing simultaneously — mandatory for reversing and brake applications to prevent phase-to-phase short circuits.

Q: Can multiple 3RH29112FC22 contactors be wired for star-delta starting?

A: Yes. Star-delta starters use three contactors: main (KM1), star (KM2), and delta (KM3). The Siemens 3RT series supports mechanical and electrical interlocking accessories that prevent simultaneous energisation of star and delta contactors — critical for safety. Ensure all three contactors are rated correctly for the motor FLC and star-delta transition current.

Q: What is the electrical and mechanical life of the 3RH29112FC22?

A: Siemens contactors are rated for millions of operations: typically 10–30 million mechanical operations and 1–3 million electrical operations at rated current and voltage (AC-3 duty). High-frequency switching applications (>10 operations/hour) require checking the specific thermal capacity of the contactor for continuous duty without overheating.

Q: Which Siemens accessories are compatible with the 3RH29112FC22?

A: The Siemens 3RT series supports snap-on accessories including auxiliary contact blocks, coil surge suppressors, mechanical interlocks, and direct-mount overload relays. Accessories are series-specific — always verify compatibility using the Siemens product catalogue before ordering. myelectric.in can advise on the correct accessory part numbers for the 3RH29112FC22.