A4BY700 - 700Amp Fuse

A4BY700 - 700Amp Fuse

Keep your electrical systems running smoothly with the Mersen A4BY700 Amp-Trap® Class L Time-Delay Fuse. Rated at 700 amps, this fuse is perfect for service entrance equipment, feeder circuits, and circuit breakers. Its clever time-delay design lets harmless surges—like motor starts or brief spikes—pass without tripping, while reacting instantly to real overcurrent events to protect your equipment and minimize downtime.

Installation is simple thanks to silver-plated copper blade terminals and a bolt-mounted design. Clear markings make identification and replacement quick, saving time and effort for electricians and technicians.

Key Features and Benefits

• Time-delay design prevents trips from harmless surges
• 700A rating for medium to high-current circuits
• Rated for 600VAC / 300VDC applications
• 200kA AC interrupting capacity for reliable fault protection
• Silver-plated copper blade terminals for secure connections
• Durable GMG (glass melamine) body for long-lasting stability
• Continuous-duty operation at full amp rating
• Clear markings simplify identification and maintenance
• Bolt-mounted installation for a stable and secure fit

Technical Specifications

• Catalog Number: A4BY700
• Series: A4BY – Class L – Time-Delay
• Fuse Class: Class L
• Ampere Rating: 700A
• Voltage Rating: 600VAC / 300VDC
• Frequency: 50/60 Hz
• Speed/Characteristic: Time-Delay
• Mounting: Bolted
• Connection Type: Blade
• Connection Material: Silver-Plated Copper
• AC Max Interrupting Rating: 200kA
• Body Material: GMG (Glass Melamine)
• Product Diameter: 50.8 mm
• Product Length: 219.2 mm
• Product Weight: 1.6511 kg

Material Compliance and Certifications

• RoHS Compliant
• UL/CSA approved for low-voltage applications
• Meets industrial and commercial circuit protection standards

Where It Works Best

• The A4BY700 is ideal for systems that need dependable surge tolerance and quick fault response:
• Service entrance panels
• Feeder circuits and distribution systems
• Industrial machinery protection
• Commercial power systems
• Circuit breakers in essential infrastructure
• With its time-delay performance, secure blade terminals, and high interrupting capacity, the Mersen A4BY700 keeps your electrical systems safe, efficient, and running reliably—perfect for demanding industrial and commercial setups.