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

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