MU1 MU2 Coil-240V L T CS94009BOOO cs94009booo spare coil 240vac mu1mu2 mc11mc 12 front
MU1/MU2 Coil-240V | L&T - CS94009BOOO Original price was: ₹1,110.00.Current price is: ₹754.80. Excl. GST
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MCX21 22 Spare Coil 415V AC L T ST91291ROOO cs94009booo spare coil 240vac mu1mu2 mc11mc 12 front 2
MCX21/22 - Spare Coil 415V AC | L&T - ST91291ROOO Original price was: ₹3,110.00.Current price is: ₹2,114.80. Excl. GST

MCX21/22 – Spare Coil 240V AC | L&T – ST91291FOOO

SKU: ST91291FOOO

Original price was: ₹3,110.00.Current price is: ₹2,114.80. Excl. GST

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The ST91291FOOO ST91291FOOO is a contactor spare part, engineered for motor control and switching in demanding Indian and international installations. Key ratings include 240V AC. Buy the MCX21/22 – Spare Coil 240V AC | 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

ParameterValue
BrandST91291FOOO
Part Number / SKUST91291FOOO
CategoryContactor Spare Part
Coil Voltage240V AC
Rated Frequency50/60 Hz
StandardIEC 60947 (tested as part of the parent device certification)
CertificationsBIS certified where applicable

⚡ Key Features

  • Genuine ST91291FOOO OEM accessory — manufactured to the same specification and tested to the same standards as the parent device; ensures mechanical and electrical compatibility that third-party alternatives cannot guarantee.
  • Replacement contactor coil rated 240V AC — restores the original contactor to service at a fraction of the cost of a complete replacement.
  • Exact-fit replacement — same electrical and mechanical specification as the factory-fitted coil; no recalibration or adjustment of the contactor required after fitting.
  • Direct clip-on or screw-mount to parent device — fits without panel modification or additional wiring between the accessory and main device; field-retrofittable.
  • Manufactured to IEC 60947 (tested as part of the parent device certification) — 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 ST91291FOOO 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 ST91291FOOO has a coil voltage of 240V AC — what control supply is needed?

A: This ST91291FOOO 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: How do I know the ST91291FOOO replacement coil matches my contactor?

A: Match three things: (1) the contactor series and frame size stated for the ST91291FOOO, (2) the coil voltage — the replacement must equal the control circuit voltage exactly, and (3) AC or DC supply type. Fitting a coil of the wrong voltage causes failure to pull in (too low) or coil burnout (too high). The original coil’s voltage is printed on its face — verify before ordering.

Q: What causes a contactor coil to fail and need replacement like the ST91291FOOO?

A: The most common causes are: sustained undervoltage (coil hums and overheats while failing to seal the magnetic circuit), overvoltage, voltage spikes from nearby switching inductive loads, dust or rust on the magnet faces preventing full closure (coil draws inrush current continuously), and simple ageing of the insulation. If coils fail repeatedly, fit a surge suppressor and check the control supply voltage stability before fitting the new coil.

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