ML Contactor 110A 3P 415V AC In Built 2NO+2NC AC-3 525V AC Coil 50 Hz | L&T – SS90921MOOO

Name: L&T ML Contactor 110A 3P 415V AC, 2NO+2NC, AC-3 525V, 50Hz Coil | Reliable Electrical Component
Brand: Lauritz Knudsen (L&T)
SKU: SS90921MOOO
Price: 39256.40 INR
Availability: InStock

SKU: SS90921MOOO

Original price was: ₹57,730.00.Current price is: ₹39,256.40. Excl. GST

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The SS90921MOOO SS90921MOOO is a contactor, engineered for motor control and switching in demanding Indian and international installations. Key ratings include 110 A, 525V AC, 3 Poles. Buy the ML Contactor 110A 3P 415V AC In Built 2NO+2NC AC-3 525V AC Coil 50 Hz | L&T 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	SS90921MOOO
Part Number / SKU	SS90921MOOO
Category	Contactor
Coil Voltage	525V AC
Contact Configuration	2 NO + 2 NC
Current Rating	110 A
Poles	3 Poles
Frequency	50 Hz
Utilisation Category	AC-3 (motor duty) / AC-1 (resistive)
Rated Frequency	50/60 Hz
Motor Power (AC-3, 415V)	Up to 55 kW
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 where applicable

⚡ Key Features

110 A AC-3 rated — suits up to a 55 kW squirrel-cage induction motor at 415V for direct-on-line (DOL) starting and running.
525V AC coil — connects directly to pushbutton station, PLC digital output, or timer relay; suitable for standard 50Hz Indian industrial control circuits.
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 where applicable — meets Indian regulatory requirements for use in government, commercial, and industrial electrical installations.
Genuine authorised SS90921MOOO 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: Is the SS90921MOOO rated 110 A for AC-3 motor duty or AC-1 resistive duty?

A: The 110 A rating of this SS90921MOOO contactor applies to AC-3 duty (squirrel cage motor starting and running). For AC-1 (resistive/non-inductive) loads, the current can be up to ~1.3× the AC-3 rating. AC-4 (plugging/reversing) requires significant de-rating — consult the SS90921MOOO selection table.

Q: The SS90921MOOO has a coil voltage of 525V AC — what control supply is needed?

A: This SS90921MOOO device requires a 525V AC control supply connected to the coil terminals (A1 and A2). For AC coils, ensure the control circuit voltage is stable — voltage drops below 85% of rated coil voltage can cause chatter and coil overheating. Always fit a surge suppressor across the coil when switching with a PLC or solid-state relay.

Q: What is the electrical and mechanical life of the SS90921MOOO?

A: SS90921MOOO 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 SS90921MOOO 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 SS90921MOOO 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 SS90921MOOO contactors be wired for star-delta starting?

A: Yes. Star-delta starters use three contactors: main (KM1), star (KM2), and delta (KM3). The SS90921MOOO 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.