Fuse Amp-Trap® 600V 600A Time-Delay Class L A4BY Series – Electrical Protection Fuse

The Fuse Amp-Trap® A4BY Series is a Class L, 600V, 600A time-delay fuse designed for protecting service entrance equipment, feeder circuits, and circuit breakers. It is suitable for use in electrical distribution systems including mains feeders, load centers, panelboards, switchboards, and metering centers. This fuse is a 100% rated device, allowing continuous current up to its ampere rating, with a minimum 4-second time delay at 500% rating to accommodate normal current surges and coordinate with ground fault relays. Manufactured by Mersen, it features a robust glass melamine insulation body and plated terminals for reliable performance in harsh environments, making it a preferred choice among electrical distributors and switchgear suppliers.

Specifications

• Manufacturer: Mersen
• Manufacturer Part #: A4BY600
• Voltage Rating: 600VAC, 300VDC
• Amperage Rating: 600 A
• Interrupt Rating: 200 kA
• Fuse Class: Class L
• Connection Type: Blade
• Mounting Type: Bolted
• Insulation Material: Glass Melamine (GMG)
• Dimensions (L x W x H): 8.63 in x 2 in x 2 in
• Diameter: 2 inches
• Product Weight: 2.38 lbs

Features

• Current-limiting capability to protect electrical equipment
• 4-second minimum time-delay at 500% rating for surge tolerance
• Unique dimensions prevent substitution by other fuse classes
• Blade-stamped catalog numbers for permanent identification
• Glass melamine body and plated terminals for superior reliability in harsh environments
• UL/CSA listed and self-certified for DC applications

Downloads & Links

• Spec Sheet
• Spec Sheet FR
• Curves 1
• Curves 2
• Drawings