Mersen Amp-Trap® A50P A50P40-4 High-Speed Blade Fuse, 40A 500VAC / 450VDC — Pack of 10

Product overview

• Part number: A50P40-4
• Series: Amp-Trap® A50P (Form 101)
• Manufacturer: Mersen
• Type: High-speed blade fuse
• Ampere rating: 40 A
• Rated voltage: 500 V AC (UL), 450 V DC (UL)
• Breaking capacity (AC Max I.R.): 25 kA
• Quantity: Pack of 10

Key features

• High-speed (low I2t) protection optimized for DC drives, UPS systems, and power electronics where fast clearing is required.
• Blade (male) terminal for bolted mounting; connection terminals are tin‑plated copper for reliable conductivity and corrosion resistance.
• Robust insulating body material: GMG (glass‑mat reinforced).
• High interrupting capacity: 25 kA AC, suitable for industrial distribution and semiconductor protection applications.
• Form 101 design allows direct replacement in equipment specified for Amp‑Trap A50P fuses.

Typical applications

• DC drives and motor-control converters
• Uninterruptible Power Supplies (UPS)
• Inverter and power-conversion equipment
• Semiconductor protection and industrial power distribution
• Field replacement and maintenance spares for equipment using Amp‑Trap A50P fuses

Mechanical and packing data

• Product length: 3.19 in (81 mm)
• Product diameter: 0.81 in (approx. 20.6 mm)
• Mounting: bolted, blade terminal
• Sell pack quantity: 10 EA; pack weight ~2.1 lb

Safety and handling

• Replace only with identical type and rating to maintain proper protection characteristics.
• Verify correct ampere rating and voltage rating for the circuit; incorrect replacement may compromise safety.
• Observe manufacturer and system manufacturer installation instructions for torque, mounting, and environmental limits.

What’s included

• 10 × Mersen Amp‑Trap® A50P A50P40-4 high-speed blade fuses, 40 A, 500 VAC / 450 VDC

Verification and datasheet

• Confirm part marking (A50P40-4) and EAN/UPC (782001945978) on delivery. For detailed electrical characteristics (I2t, time-current curves, ambient derating, and approved standards), request the official Mersen datasheet prior to installation.