Bussmann 170M6191 Eaton Series High-Speed Square Body Fuse, 450A, Class aR

Bussmann 170M6191 Eaton Series High-Speed Square Body Fuse, 450A, Class aR

The Bussmann 170M6191 is an Eaton series high-speed square body fuse built to DIN 43620 dimensions, rated 450A with a voltage rating of 700V (UL) / 690V (IEC) and a 100 kAIC interrupt rating. Classified as Utilization Category aR (accompanied semiconductor protection), this fuse is engineered to protect power semiconductors and associated circuit components from short-circuit and overcurrent conditions. Its square body construction with slotted, center bolted tags supports reliable, low-resistance connections in demanding industrial power electronics applications.

Key Features

• Compact Square Body Footprint: Overall dimensions of 76 mm (height) x 168 mm (length/depth) x 95 mm (width) at 1254 g for space-conscious panel and enclosure layouts.
• Durable Fuse Construction: Square body design with slotted, center bolted tags for secure, low-resistance bolted connections.
• High-Speed Class aR Design: Built to DIN 43620 dimensional standards for accompanied semiconductor protection (Utilization Category aR).
• Electrical Ratings: 450A rated current with a 700V (UL) / 690V (IEC) voltage rating and 100 kAIC interrupt rating for demanding power circuits.
• Voltage Rating: 1250 V AC voltage type rating per manufacturer specification.
• Let-Through Energy: Clearing I2t of 185,000 at 1000 V and 245,000 at 1250 V, with a Pre-Arc I2t of 31,000 for coordinated semiconductor protection.
• Watt Losses: Rated at 100 W for accurate thermal and enclosure design planning.

Certifications & Compliance

• IEC Rated
• CE Marked

Technical Specifications

• Amperage Rating: 450 A
• Application: semiconductor protection
• Certifications: IEC Rated
• Clearing I2t: 185000 at 1000 V, 245000 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: 31000
• Product Height: 76 mm
• Product Length Depth: 168 mm
• Product Weight: 1254 g
• Product Width: 95 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 1250 V
• Voltage Type: AC
• Watt Losses: 100 W

Typical Applications

• Semiconductor Device Protection
• Power Electronics and Converter Circuits
• Industrial Drive and Motor Control Systems
• High-Speed Fault Current Interruption Applications

Why Bussmann?

Bussmann by Eaton engineers this high-speed Class aR square body fuse to DIN 43620 dimensional standards with IEC-rated performance and CE marked compliance, giving specifiers documented let-through energy and interrupt data for accurate semiconductor protection coordination. The bolted square body construction and defined watt-loss and I2t characteristics make it a dependable choice for professional power electronics and industrial control installations.