Bussmann FWJ-40A High Speed Fuse

SKU: 10B50842

$239.73

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Description

Bussmann FWJ-40A High Speed Fuse

Overview

The Bussmann FWJ-40A High Speed Fuse is a premium circuit protection device engineered to deliver ultra-rapid response to overcurrent events. Designed for 40-ampere applications, this fuse safeguards sensitive electronic equipment and power systems by interrupting fault currents within milliseconds, minimizing damage and downtime.

Key Features

  • Ultra-Fast Response: Clears short-circuit faults in under 1 ms to protect vulnerable components.
  • High Breaking Capacity: Withstands up to 300kA interrupt rating for robust protection in demanding environments.
  • Precision Performance: Rated for 40A at 700V AC/500V DC, ensuring reliable operation in industrial power systems.
  • Compact Design: Space-saving cylindrical form factor (10x38mm) for easy integration into panels, inverters, and motor drives.
  • Endurance-Tested: Certified to IEC 60269-4 standards for consistent performance under extreme conditions.

Applications

Ideal for:

  • Semiconductor protection (diode/thyristor circuits)
  • Solar inverters and renewable energy systems
  • UPS (Uninterruptible Power Supplies)
  • Industrial motor drives and robotics
  • Railway traction systems

Technical Specifications

Attribute Value
Current Rating 40A
Voltage Rating 700V AC / 500V DC
Interrupt Rating 300,000A (300kA)
Speed Class Ultra-Rapid (aR)
Dimensions 10mm x 38mm (Dia x L)
Standards IEC 60269-4, UL 248-14

Why Choose Bussmann?

  • Industry-Leading Reliability: Backed by Eaton’s 100+ years of circuit protection expertise.
  • Zero Maintenance: Non-degrading design ensures consistent performance without recalibration.
  • Global Compliance: Meets international safety certifications for cross-border deployments.

Protect critical assets with the speed and precision of Bussmann engineering—where milliseconds make the difference.

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Shipping and Returns
Returns are easy You may return items within 30 days of delivery for a refund. View our return policy FREE Shipping on orders over $49. Eaton Bussmann Fuse Relay Online Sales Store offers one to five day delivery in the United States. The variation depends on the chosen shipping speed and the warehouse location for the product(s). Same Day Shipping We strive to ship out your items within one business day. In rare circumstances, Eaton Bussmann Fuse Relay Online Sales Store may reserve up to 5 business days to complete shipment. Feel free to contact us if your order is time sensitive.
1-Year Warranty
Eaton Bussmann's fuses and relays for sale are brand new and come with a 1-year comprehensive warranty. Rest assured, all products are authentic OEM (original equipment manufacturer).