3TY7443-0BW4 | Magnet coil for contactor 3TF44, 3TF45 48 V DC – Siemens

Name: 3TY7443-0BW4 | Magnet coil for contactor 3TF44, 3TF45 48 V DC - Siemens - myelectric.in
Brand: Siemens
SKU: 3TY7443-0BW4
Price: 2947.80 INR
Availability: OutOfStock

SKU: 3TY7443-0BW4

Original price was: ₹4,335.00.Current price is: ₹2,947.80. Excl. GST

Out of stock

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The Siemens 3TY7443-0BW4 is a contactor, engineered for motor control and switching in demanding Indian and international installations. Key ratings include 48V DC. Buy the 3TY7443-0BW4 | Magnet coil for contactor 3TF44, 3TF45 48 V DC 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	3TY7443-0BW4
Category	Contactor
Coil Voltage	48V DC
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

48V DC coil — connects directly to pushbutton station, PLC digital output, or timer relay; suitable for standard 50Hz Indian industrial control circuits.
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: The 3TY7443-0BW4 has a coil voltage of 48V DC — what control supply is needed?

A: This Siemens device requires a 48V DC control supply connected to the coil terminals (A1 and A2). For DC coils, observe polarity where marked. DC coils produce no inrush and are preferred for PLC output cards. Always fit a surge suppressor across the coil when switching with a PLC or solid-state relay.

Q: Can multiple 3TY7443-0BW4 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.

Q: What is the electrical and mechanical life of the 3TY7443-0BW4?

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 3TY7443-0BW4 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.