Bussmann 170M5440 High-Speed Fuse-Link, 315A, 1250V AC, Size 2, Class aR

Bussmann 170M5440 High-Speed Fuse-Link, 315A, 1250V AC, Size 2, Class aR

The Bussmann 170M5440 is a high-speed fuse-link engineered for semiconductor protection, rated 315 A at AC 1250 V in a Size 2 body measuring 61 x 77 x 81 mm. Built to the Class aR (accompanied semiconductor protection) utilization category, this fuse-link carries IEC and UL recognition and features a single top-mounted fuse status indicator for quick visual verification of fuse condition. With a 100 kAIC interrupt rating, it delivers the fast-clearing performance required to safeguard sensitive semiconductor devices in demanding power electronics applications.

Key Features

• Size 2 Body: Compact 61 x 77 x 81 mm square-body dimensions with special bladed contacts for reliable flush mounting.
• High-Speed Rating: 315 A continuous rating at AC 1250 V for fast-acting protection of semiconductor circuits.
• Class aR Utilization: Accompanied semiconductor protection category designed to work alongside upstream branch-circuit protection.
• Interrupt Rating: 100 kAIC interrupt rating for reliable performance in high fault-current environments.
• Fuse Status Indicator: Top-mounted single indicator provides clear visual confirmation of fuse condition.
• Flush Mounting: Square body with special bladed contacts designed for flush-mount installations.
• I2t Coordination: Pre-arc I2t of 13000 and clearing I2t of 77500 at 1000 V / 105000 at 1250 V for precise coordination with associated devices.
• Voltage Rating: Rated 700 V (UL) and 690 V (IEC), with 75 W watt losses.

Certifications & Compliance

• IEC Rated
• UL Recognized
• CE Marked

Technical Specifications

• Application: semiconductor protection
• Certifications: IEC Rated
• Class: Class aR
• Clearing I2t: 77500 at 1000 V, 105000 at 1250 V
• Compliances: CE Marked
• Fuse Indicator: Top fuse status indicator
• Fuse Shape: Square body, special bladed contacts
• Interrupt Rating: 100 kAIC
• Mounting Method: Flush
• Packaging Type: Standard
• Pre Arc I2t: 13000
• Product Height: 60 mm
• Product Length Depth: 92 mm
• Product Weight: 545 g
• Product Width: 163 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 700 V (UL), 690 V (IEC)
• Watt Losses: 75 W

Typical Applications

• Semiconductor Protection
• Power Conversion Equipment
• Variable Frequency Drives
• Rectifier and Converter Circuits
• Industrial Power Electronics

Why Bussmann?

Bussmann fuse-links are engineered for dependable, code-compliant performance in demanding industrial power electronics. The 170M5440's IEC and UL recognition, CE marking, and 100 kAIC interrupt rating reflect the rigorous testing behind Bussmann's semiconductor protection fuse line, while the top-mounted status indicator simplifies maintenance and fault verification in the field.