Bussmann 170M1757 High-Speed Square Body Fuse, 690V 125A Class aR

Bussmann 170M1757 High-Speed Square Body Fuse, 690V 125A Class aR

The Bussmann 170M1757 is an Eaton Bussmann series high-speed square body fuse engineered for demanding power electronics protection. Rated 690V AC and carrying a 750V voltage rating, 125A amperage rating, and a 200 kAIC interrupting rating, this Class aR fuse is purpose-built for IGBT circuits and semiconductor protection applications where fast-acting response is critical. The square body design features offset bolted tags for secure, low-resistance panel connections, with precise dimensions of 140 mm length, 101 mm width, and 42 mm height to support accurate enclosure and panel layout planning.

Key Features

• Amperage Rating: 125A for coordinated protection of IGBT circuits and semiconductor devices.
• Voltage Rating: Rated 690V AC service with a 750V manufacturer voltage rating for high-voltage power electronics circuits.
• Interrupting Rating: 200 kAIC interrupting capacity for demanding fault-current environments.
• Utilization Category: Class aR (accompanied semiconductor protection) for coordinated overcurrent protection alongside semiconductor devices.
• Fuse Shape: Square body construction with offset bolted tags for secure, low-resistance mounting.
• Compact Dimensions: 140 mm length x 101 mm width x 42 mm height for precise panel and enclosure fit.
• Voltage Type: AC rated for alternating current power electronics circuits.

Technical Specifications

• Amperage Rating: 125 A
• Application: IGBT circuits, semiconductor protection
• Compliances: Contact factory
• Fuse Shape: Square body, offset bolted tags
• Insulated Metal Gripping Lugs (IMGL): No
• Packaging Type: Standard
• Product Height: 42 mm
• Product Length/Depth: 140 mm
• Product Weight: .001 g
• Product Width: 101 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 750 V
• Voltage Type: AC

Typical Applications

• IGBT Circuit Protection
• Semiconductor Device Protection
• Power Electronics and Drive Systems
• Industrial Power Conversion Equipment

Why Bussmann?

Eaton Bussmann series fuses are engineered for coordinated protection of sensitive power electronics, and the 170M1757 backs that mission with a 200 kAIC interrupting rating and Class aR utilization category built specifically for accompanied semiconductor protection. Its high-speed square body construction with offset bolted tags delivers the secure, low-resistance connections that IGBT and semiconductor circuits demand. For engineers specifying reliable, code-coordinated overcurrent protection in demanding power electronics applications, Bussmann remains a trusted standard.