Mersen A4BY800 Class L Time-Delay Fuse – 800A – 600VAC/300VDC – Amp-Trap® Blade Fuse
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The Mersen A4BY800 is a high-capacity Amp-Trap® Class L time-delay fuse designed for demanding industrial, commercial, and utility power distribution systems. Rated at 800 Amps, this current-limiting fuse provides dependable protection against overloads and short circuits while allowing safe passage of motor starting currents and transformer inrush conditions. With voltage ratings of 600VAC and 300VDC, it is suitable for service entrance equipment, feeder circuits, switchgear, and large-scale electrical distribution systems where high reliability and fault protection are essential.
Voltage and Rating
- Current Rating: 800 Amps
- Voltage Rating: 600VAC / 300VDC
- Frequency: 50/60 Hz
- Fuse Class: Class L
- Fuse Type: Time-Delay, Current-Limiting
Key Specifications
- Product Type: Industrial Power Fuse
- Series: Amp-Trap® A4BY
- Part Number: A4BY800
- Manufacturer: Mersen / Ferraz Shawmut
- Mounting Style: Blade
- Time-Delay Capability: Yes (motor and transformer inrush tolerant)
- Current Limiting: Yes
Technical Specifications
- Protection Type: Overcurrent and short-circuit protection
- Application Suitability: Service entrances, feeders, transformers, switchboards, and industrial power distribution systems
- Coordination Type: Supports selective coordination with downstream protective devices
- Construction Features: High interrupting capacity, low let-through energy, rugged industrial-grade construction
- System Integration: Designed for commercial, industrial, and utility-scale electrical systems
Standards and Approvals
- UL Listed
- CSA Certified
- Compliant with Class L fuse protection requirements
Product Data
- Manufacturer: Mersen / Ferraz Shawmut
- Series: Amp-Trap®
- Part Number: A4BY800
- EAN/UPC: 782001939113
Applications
- Industrial power distribution systems
- Commercial electrical service equipment
- Main service entrance protection
- Feeder circuit protection
- Transformer protection systems
- Switchboards and switchgear assemblies
- Motor control centers
- Critical infrastructure facilities
- Manufacturing and heavy industry
- Type Fuses
- Vendor Mersen
- Brand Mersen
Returns are easy
You may return items within 30 days of delivery for a refund.
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