MNX Contactor 300A 3P 415V AC AC-3 240V AC Coil 50/60 Hz | L&T – CS90280BOOO

Name: L&T MNX Contactor 300A 3P 415V AC AC-3 240V Coil 50/60 Hz | High-Performance Electrical Contactor
Brand: Lauritz Knudsen (L&T)
SKU: CS90280BOOO
Price: 40094.40 INR
Availability: InStock

SKU: CS90280BOOO

Original price was: ₹83,530.00.Current price is: ₹40,094.40. Excl. GST

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Looking for the MNX Contactor 300A 3P 415V AC AC-3 240V AC Coil 50/60 Hz | L&T? This genuine CS90280BOOO contactor is built for motor control and switching, combining proven reliability with full compliance to applicable IEC/IS standards. Key ratings include 300 A, 240V AC, 3 Poles. Order part number CS90280BOOO from myelectric.in — a trusted CS90280BOOO supplier offering competitive pricing, GST billing, and shipping across India and overseas.

📋 Technical Specifications

Parameter	Value
Brand	CS90280BOOO
Part Number / SKU	CS90280BOOO
Category	Contactor
Coil Voltage	240V AC
Current Rating	300 A
Poles	3 Poles
Frequency	60 Hz
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 where applicable

⚡ Key Features

300 A AC-3 rated for motor and resistive load switching at LV.
240V 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 CS90280BOOO 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 CS90280BOOO rated 300 A for AC-3 motor duty or AC-1 resistive duty?

A: The 300 A rating of this CS90280BOOO 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 CS90280BOOO selection table.

Q: The CS90280BOOO has a coil voltage of 240V AC — what control supply is needed?

A: This CS90280BOOO device requires a 240V 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: Can multiple CS90280BOOO contactors be wired for star-delta starting?

A: Yes. Star-delta starters use three contactors: main (KM1), star (KM2), and delta (KM3). The CS90280BOOO 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 CS90280BOOO?

A: CS90280BOOO 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 CS90280BOOO 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 CS90280BOOO 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.