Bussmann 170L5020 High-Speed Square Body Fuse, Class aR, 250A

Bussmann 170L5020 High-Speed Square Body Fuse, Class aR, 250A

The Bussmann 170L5020 is an Eaton series high-speed square body fuse engineered for semiconductor protection, rated 250A with a dual voltage rating of 700V (UL) and 690V (IEC). Built with a square body and slotted center bolted tags, this Class aR fuse is classified for accompanied semiconductor protection and includes a top fuse status indicator so installers and maintenance crews can verify fuse condition at a glance. It is designed for industrial and commercial electrical systems where fast-acting overcurrent protection of power semiconductors is required.

Key Features

• Amperage Rating: 250A for reliable overcurrent protection in semiconductor and power circuits.
• Voltage Rating: 700V (UL) and 690V (IEC) for use across both UL and IEC-compliant industrial systems.
• High-Speed Class aR: Classified for accompanied semiconductor protection, designed to clear faults quickly and protect sensitive power semiconductor devices.
• Square Body Design: Square body construction with slotted center bolted tags for secure, low-resistance mounting connections.
• Top Fuse Status Indicator: Built-in indicator allows quick visual verification of fuse condition without removal.
• Eaton Bussmann Series: Manufactured under the Eaton Bussmann series for consistent, industrial-grade fuse performance.

Certifications & Compliance

• 700V (UL) Voltage Rating
• 690V (IEC) Voltage Rating

Technical Specifications

• Amperage Rating: 250 A
• Application: semiconductor protection
• Compliances: Contact factory
• Fuse Shape: Square body, slotted center bolted tags
• Insulated Metal Gripping Lugs (Imgl): No
• Packaging Type: Standard
• Product Height: 65 mm
• Product Length Depth: 305 mm
• Product Weight: 58.16666667 g
• Product Width: 145 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 660 V
• Voltage Type: AC

Typical Applications

• Semiconductor Device Protection
• Power Rectifier and Converter Circuits
• Industrial and Commercial Electrical Systems
• High-Speed Overcurrent Protection for AC Power Circuits
• Motor Drive and Power Conversion Equipment

Why Bussmann?

Bussmann by Eaton builds this 170L5020 high-speed square body fuse for demanding semiconductor protection applications, combining a Class aR rating with a dual 700V (UL) / 690V (IEC) voltage rating and a top fuse status indicator for fast field verification. The square body design with slotted center bolted tags supports secure, code-compliant installation for professional electrical and industrial power systems.