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L&T (Larsen & Toubro) BF310000

The L&T BF310000 is a heavy-duty 100A triple-pole switch disconnector designed for superior circuit isolation in 3-phase industrial environments. As a cornerstone of the L&T BF Series, this device is engineered to handle AC-23A utilization categories, making it exceptionally reliable for switching highly inductive motor loads. Its compact thermoplastic build and DIN rail compatibility ensure seamless integration into modern power distribution boards while maintaining high safety standards.

Quick Answer

The L&T BF310000 is a 100 Amp, 3-Pole manual switch disconnector used primarily for safe electrical isolation of 415V 3-phase circuits. It is best suited for industrial motor control centers and main distribution panels requiring a DIN-rail mounted isolator.

✓High 100A continuous current rating for heavy industrial loads.
✓AC-23A utilization category optimized for switching motor and inductive loads.
✓Robust 10kA breaking capacity ensures resilience during operational switching.
✓Compact DIN Rail mounting design for efficient panel space utilization.
✓IP40 rated thermoplastic housing offering high insulation and heat resistance.

Select the L&T BF310000 if you need a high-amperage (100A), 3-pole manual isolator that fits standard DIN rail tracks. It is the ideal choice for industrial panels where space is a premium but heavy-duty motor switching (AC-23A) performance is non-negotiable.

✓ Who Should Buy

  • •Electrical panel builders requiring a certified 100A 3-pole isolator for industrial distribution.
  • •Facility engineers managing large motor loads that require frequent maintenance isolation.
  • •Industrial contractors looking for a reliable, Indian-made DIN rail switch with AC-23A rating.

✕ Who Should Avoid

  • •Residential users looking for a switch with built-in short circuit or overload protection (use an MCB or MCCB instead).
  • •Outdoor installations requiring direct exposure to rain without a secondary IP65+ rated enclosure.
Product Overview
The L&T BF310000 represents the pinnacle of Larsen & Toubro's engineering in the switchgear segment. This 100A Switch Disconnector is built for the rigors of the Indian industrial climate, featuring a 3-pole configuration that provides comprehensive isolation for 415V systems. Unlike standard switches, the BF310000 is specifically tested for AC-23A applications, ensuring it can safely interrupt current for motors and other high-surge equipment without contact welding or premature failure. Installation is streamlined through a standard DIN rail compatible base and secure screw terminals, accommodating heavy-gauge industrial wiring. While the device functions as a manual isolator without internal overload tripping, its mechanical endurance and high-grade housing material make it an essential safety component for any complex electrical network where downstream maintenance requires a definitive, visible break in power.

BrandL&T (Larsen & Toubro)
Model NameBF310000
TypeMain Switch Disconnector
SeriesBF Series
Housing MaterialThermoplastic
Country Of OriginIndia
Release Year2010

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Engineering Analysis
The engineering of the BF310000 centers on its 'Switch Disconnector' designation, adhering to strict isolation distance requirements. The 10kA breaking capacity is supported by silver-alloy contacts that resist pitting even under the stress of inductive load switching. The internal geometry is optimized to quench minor arcs quickly, while the screw terminals are designed to maintain high pressure on the conductors to prevent localized heating at the 100A threshold.

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