Bussmann 170E-391 High-Speed Traction Fuse, Class aR, 40 kAIC

Bussmann 170E-391 High-Speed Traction Fuse, Class aR, 40 kAIC

The Bussmann 170E-391 is an Eaton Bussmann series high-speed traction fuse engineered for demanding power semiconductor protection duty. Built to the Class aR utilization category, this fuse delivers a 40 kAIC interrupt rating for dependable short-circuit protection, plus a top-mounted fuse status indicator for a fast, at-a-glance condition check. This listing covers the 170E-391 family across 40A, 63A, and 125A amp ratings, so specifiers can match the fuse to the exact current requirements of the circuit.

Key Features

• Amp Rating Range: Available in 40A, 63A, and 125A ratings across the 170E-391 family to suit a range of traction and semiconductor circuit current demands.
• Interrupt Rating: Rated 40 kAIC for reliable interruption of high fault currents in demanding power electronics environments.
• Utilization Category: Class aR (accompanied semiconductor protection) designation for coordinated protection of power semiconductor devices such as diodes and thyristors.
• Fuse Status Indicator: Top-mounted status indicator lets technicians visually confirm fuse condition without removing the fuse from its mounting block.
• Fuse Body Design: Square body construction with offset bolted tags for secure, low-resistance connections in high-speed fuse mounting hardware.
• Packaging: Supplied in standard packaging for straightforward stocking, handling, and distribution.

Technical Specifications

• Utilization Category: aR (accompanied semiconductor protection)
• Packaging Type: Standard
• Fuse Shape: Square body, offset bolted tags
• Certifications: Contact factory

Typical Applications

• Traction and Rail Electrical Systems
• Semiconductor Device Protection Circuits
• Industrial Power Conversion and Drive Equipment
• High-Speed Fuse Protection Panels and Mounting Blocks
• Coordinated Power Semiconductor Protection Schemes

Why Bussmann?

Bussmann is a recognized name in circuit protection, and the 170E-391 high-speed traction fuse reflects that reputation with a robust square-body, offset-bolted-tag construction built for demanding semiconductor and traction protection duty. The Class aR utilization category and 40 kAIC interrupt rating support coordinated, code-conscious protection schemes, while the top fuse status indicator simplifies field verification across the 40A, 63A, and 125A range. Choose Bussmann for dependable, professional-grade high-speed fuse protection.