Ferraz Shawmut A4BY1600 Current-Limiting Fuse

Description:

The Ferraz Shawmut A4BY1600 Fuse Type 55AK is a Class L current-limiting time-delay fuse rated at 1600 Amps and 600 VAC, designed to provide overcurrent and short-circuit protection for high-capacity electrical distribution systems. Commonly installed in service entrance equipment, switchboards, motor control centers (MCCs), feeder circuits, transformers, and industrial power distribution systems where high interrupting capacity and time-delay protection are required. Maintenance technicians and system integrators use this fuse for equipment repair, retrofit, expansion, and replacement to protect electrical equipment, improve system reliability, and minimize production downtime. The A4BY1600 is part of the Amp-Trap® Class L fuse family and features a 4-second minimum time delay at 500% of its rated current to accommodate normal inrush currents.

Applications:

The Ferraz Shawmut A4BY1600 Fuse Type 55AK is used to protect feeders, service entrance equipment, transformers, switchgear, motor control centers, and large industrial electrical systems from overload and short-circuit conditions. It is commonly utilized in manufacturing facilities, commercial buildings, utility installations, HVAC systems, and heavy industrial equipment requiring UL Class L time-delay fuse protection.

Technical Specifications:

• Manufacturer: Ferraz Shawmut (Now Mersen)
• Part Number: A4BY1600
• Type: 55AK
• Product Type: Class L Time-Delay Current-Limiting Fuse
• Ampere Rating: 1600 A
• Rated Voltage: 600 VAC / 300 VDC
• Interrupting Rating: 200 kA AC / 100 kA DC
• Fuse Class: UL Class L
• Time Delay: 4 Seconds Minimum at 500% Rated Current
• Frequency: 50/60 Hz
• Mounting Style: Blade / Bolt-In
• Standards: UL 248-10, CSA C22.2 No. 248.10
• Installation: Direct Replacement for Class L Fuse Holders and Switchgear

Common Replacements:

• Mersen A4BY1600-TI
• Bussmann KRP-C-1600SP
• Littelfuse KLLU1600