3TW72911AB78 | Direct on line starter 7.5 kW, relay range (12.5 A-20 A) Control voltage (200 V-400 V) – Siemens

Name: Siemens 3TW72911AB78 Direct Online Starter 7.5kW
Brand: Siemens
SKU: 3TW72911AB78
Price: 3337.20 INR
Availability: InStock

SKU: 3TW72911AB78

Original price was: ₹6,180.00.Current price is: ₹3,337.20. Excl. GST

In stock

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The Siemens 3TW72911AB78 is a relay, engineered for motor control and switching in demanding Indian and international installations. Key ratings include 200V AC. Buy the 3TW72911AB78 | Direct on line starter 7.5 kW, relay range (12.5 A-20 A) Control voltage (200 V-400 V) 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	3TW72911AB78
Category	Relay
Voltage Rating	200V AC
Power Rating	7.5 kW
Rated Frequency	50/60 Hz
Mounting	35mm DIN rail or plug-in socket
Standard	IEC 60947-5-1
Certifications	BIS certified, CE, cULus (select models)

⚡ Key Features

Manufactured to IEC 60947-5-1 — 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: How do I test the 3TW72911AB78 relay in the field without a signal source?

A: Most Siemens relays can be manually forced using the test button (if fitted) — this mechanically closes the relay contacts without energising the coil, allowing functional testing of the controlled circuit. For coil testing, use a multimeter to measure coil resistance (typically 500–2000Ω for AC coils at rated voltage) and compare with datasheet values.

Q: Can the 3TW72911AB78 relay be mounted on a DIN rail socket for easy replacement?

A: This Siemens relay typically requires direct panel or DIN rail wiring. For applications requiring frequent relay replacement, consider the plug-in relay variant of this series with a matching socket base.