Mersen A4BY400-55AL - Class L Time-Delay Fuse 400A@600V (200kA AIC)
Mersen A4BY400-55AL - Class L Time-Delay Fuse 400A@600V (200kA AIC)
Mersen A4BY400-55AL - Class L Time-Delay Fuse 400A@600V (200kA AIC)
Mersen A4BY400-55AL - Class L Time-Delay Fuse 400A@600V (200kA AIC)

Mersen A4BY400-55AL - Class L Time-Delay Fuse 400A@600V (200kA AIC)

Ferraz Shawmut
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Mersen A4BY400-55AL is a bolt-in time-delay fuse designed for high-current circuit protection in industrial power distribution systems. This 600V-rated fuse features a 400A current rating and 200kA interrupting capacity at 600V, with a Class L bolt-in configuration for secure mounting. Its time-delay (TD) characteristic provides overload protection while withstanding temporary inrush currents, housed in a durable single-barrel construction weighing 4 lb. Compliant with industry standards for high-performance fuses, it is commonly used in motor control centers, switchgear, and heavy industrial equipment requiring reliable short-circuit protection.

Key Features & Specifications
  • Type: Amp-Trap Class L time-delay fuse with bolt-in connection
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • AIC Rating: 200kA @ 600V
  • Connection: Bolt-In
  • Barrels: 1
  • Velocity: TD (Time Delay)
  • Weight: 4 lb
  • Standards: UL/CSA recognized
  • Applications: Industrial power distribution, motor protection, switchgear
Product Identification
  • UPC: 78200193781
  • GTIN: 00782001937812