3RA2425-8XF32-1BB4 | Sirius 3RA24 Star Delta Contactor Screw Terminal 32/40A, 3 Pole, 24VDC, AC3 Duty – Siemens

Name: Siemens Sirius 3RA24 Star Delta Contactor 32/40A, 24VDC | 3RA2425-8XF32-1BB4
Brand: Siemens
SKU: 3RA2425-8XF32-1BB4
Price: 62060.90 INR
Availability: OutOfStock

SKU: 3RA2425-8XF32-1BB4

Original price was: ₹134,915.00.Current price is: ₹62,060.90. Excl. GST

Out of stock

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The Siemens 3RA2425-8XF32-1BB4 is a contactor, engineered for motor control and switching in demanding Indian and international installations. Key ratings include 3 Poles. Buy the 3RA2425-8XF32-1BB4 | Sirius 3RA24 Star Delta Contactor Screw Terminal 32/40A, 3 Pole, 24VDC, AC3 Duty 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	3RA2425-8XF32-1BB4
Category	Contactor
Poles	3 Poles
CT Ratio	32/40 A
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 13947-4-1
Certifications	BIS certified, CE, cULus (select models)

⚡ Key Features

3 Poles main contacts with silver-alloy (AgSnO₂) tips — rated for AC-3 duty (DOL motor starting/stopping); low contact resistance reduces heat at rated current.
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 instruments and meters are compatible with the 32/40 A CT ratio of the 3RA2425-8XF32-1BB4?

A: The 32/40 A CT ratio means for every 32A in the primary (main) conductor, the secondary outputs 40 AA. Instruments connected to the secondary — ammeters, energy meters, protection relays — must be rated for 5A (or 1A where specified). Set the CT ratio in the connected meter/relay to 32/40 A so readings display the true primary current. Never open-circuit a CT secondary — this generates dangerous high voltages.

Q: What is the electrical and mechanical life of the 3RA2425-8XF32-1BB4?

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: Can the 3RA2425-8XF32-1BB4 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 series 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 3RA2425-8XF32-1BB4 contactors be wired for star-delta starting?

A: Yes. Star-delta starters use three contactors: main (KM1), star (KM2), and delta (KM3). The Siemens contactor 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.