A4BY2500 - 2500Amp Fuse Description
A4BY2500 - 2500Amp Fuse
The Mersen A4BY2500 Amp-Trap® Class L Time-Delay Fuse is designed for serious heavy-duty electrical protection. With a 2500A rating, this fuse is ideal for service entrance equipment, feeder circuits, and high-capacity circuit breakers, delivering dependable performance in demanding industrial and commercial environments. Its time-delay feature allows it to ride through short, harmless surges—like motor startups—without tripping, yet responds quickly to actual faults to protect your equipment and minimize downtime. The silver-plated copper blade terminals provide a secure, low-resistance connection, while the durable glass melamine (GMG) body maintains stability under high currents. With a 200kA AC interrupting rating, the A4BY2500 ensures critical systems remain safe, reliable, and operational when you need it most.
Key Features and Benefits
- Time-delay design for passing harmless surges without unnecessary trips
- 2500A rating for high-current service entrance and feeder circuits
- Rated for 600VAC / 300VDC applications
- High 200kA AC interrupting capacity for fault protection
- Silver-plated copper blade terminals for secure connections
- Durable GMG (glass melamine) body provides long-lasting stability
- Continuous-duty capability at full ampere rating
- Clear markings simplify maintenance and identification
- Bolt-mounted installation for secure and reliable connections
Technical Specifications
- Catalog Number: A4BY2500
- Series: A4BY – Class L – Time-Delay
- Fuse Class: Class L
- Ampere Rating: 2500A
- 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: 114.3 mm
- Product Length: 273 mm
- Product Weight: 6.2686 kg
Material Compliance and Certifications
- RoHS Compliant
- Designed for low-voltage UL/CSA fuse applications
- Meets industry standards for industrial and commercial circuit protection
Where It Works Best
- Service entrance panels
- Feeder circuits and distribution systems
- Industrial machinery protection
- Commercial power systems
- Circuit breakers in critical electrical infrastructure
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Specifications
- Width:2.75
- Depth:2.75
- Height:10.75
- Amperes:2500
- A.I.C. Rating & Volts:200 kA @ 600 V.AC
- Type:A4BY
- Additional Notes:Knife-Blade Style, Non-Indicating, Time-Delay, current-limiting Class L Fuse
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