Bussmann 170M5248 Eaton Series High-Speed Square Body Fuse, 800A Class aR

Bussmann 170M5248 Eaton Series High-Speed Square Body Fuse, 800A Class aR

The Bussmann 170M5248 Eaton Series High-Speed Square Body Fuse is a Class aR fuse purpose-built for semiconductor protection in demanding power electronics applications. Rated 700V (UL) and 690V (IEC) with an 800A amperage rating and a 100 kAIC interrupt rating, this square body fuse uses slotted center bolted tags in the DIN 43 620 form factor for reliable, high-speed clearing. It is IEC rated and CE marked, making it suitable for protecting semiconductor devices in industrial power conversion equipment worldwide.

Key Features

• Voltage Rating: 700V (UL) and 690V (IEC), with a 1250V voltage rating listed for the fuse body, for use across UL and IEC-rated systems.
• Amperage Rating: 800A for high-current semiconductor and power conversion circuits.
• Interrupt Rating: 100 kAIC for reliable interruption of high fault currents.
• Utilization Category: Class aR (accompanied semiconductor protection) for use alongside semiconductor devices.
• Fuse Shape: Square body with slotted center bolted tags, built to the DIN 43 620 standard for consistent fit and connection.
• Clearing I2t: 1,200,000 A2s at 1000V and 1,550,000 A2s at 1250V for predictable let-through performance.
• Pre-Arc I2t: 245,000 A2s for coordinated protection design.
• Watt Losses: 120W.

Certifications & Compliance

• IEC Rated
• CE Marked

Technical Specifications

• Amperage Rating: 800 A
• Application: semiconductor protection
• Certifications: IEC Rated
• Clearing I2t : 1200000 at 1000 V, 1550000 at 1250 V
• Compliances: CE Marked
• Fuse Shape: Square body, slotted center bolted tags
• Insulated Metal Gripping Lugs Imgl : No
• Packaging Type: Standard
• Pre Arc I2t : 245000
• Product Height: 67 mm
• Product Length Depth: 284 mm
• Product Weight: 1009 g
• Product Width: 175 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 1250 V
• Voltage Type: AC
• Watt Losses: 120 W

Typical Applications

• Semiconductor Device Protection
• Power Conversion and Rectifier Circuits
• Industrial Motor Drive Systems
• High-Speed Overcurrent Protection for Power Electronics

Why Bussmann?

Bussmann by Eaton engineers the 170M5248 to the DIN 43 620 square body standard with a 100 kAIC interrupt rating, IEC rating, and CE marking, giving specifiers a fuse built for coordinated, code-compliant semiconductor protection. The Class aR utilization category and documented clearing and pre-arc I2t values support precise protection coordination in demanding industrial power electronics systems.