Bussmann 170M3239 Eaton Series High-Speed Square Body Fuse, Class aR, 63A

Bussmann 170M3239 Eaton Series High-Speed Square Body Fuse, Class aR, 63A

The Bussmann 170M3239 is an Eaton Bussmann series high-speed square body fuse built for demanding semiconductor protection duty. Rated 700V (UL) / 690V (IEC) and 63A with a 100 kAIC interrupting rating, this Class aR fuse is constructed to DIN 43 620 dimensions with a square body and slotted, center bolted tags. It is designed to protect power semiconductors and associated circuits in industrial power electronics where fast clearing and high fault-current withstand are essential.

Key Features

• Amperage Rating: 63A high-speed fuse engineered for accompanied semiconductor protection.
• Voltage Rating: 700V (UL) / 690V (IEC), with a 1250V AC voltage rating for demanding applications.
• Interrupting Rating: 100 kAIC provides reliable performance under high fault-current conditions.
• Fuse Shape: Square body design with slotted, center bolted tags built to DIN 43 620.
• Utilization Category: Class aR (accompanied semiconductor protection) for coordinated circuit protection.
• I2t Characteristics: Pre-arc I2t of 215; clearing I2t of 1300 at 1000V and 1750 at 1250V for predictable coordination.
• Watt Losses: 20W rated power dissipation.
• Compact Dimensions: 305 mm length, 145 mm width, 65 mm height, and 73 g weight for square body mounting.

Certifications & Compliance

• IEC Rated
• CE Marked
• UL Rated (700V)

Technical Specifications

• Amperage Rating: 63 A
• Application: semiconductor protection
• Certifications: IEC Rated
• Clearing I2t: 1300 at 1000 V, 1750 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: 215
• Product Height: 65 mm
• Product Length/Depth: 305 mm
• Product Weight: 73 g
• Product Width: 145 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 1250 V
• Voltage Type: AC
• Watt Losses: 20 W

Typical Applications

• Semiconductor Protection in Power Electronics
• Variable Frequency Drives and Motor Drive Circuits
• High Fault-Current Industrial Power Systems
• Rectifier and Converter Protection
• Coordinated Class aR Circuit Protection Schemes

Why Bussmann?

Eaton Bussmann series fuses are engineered to precise DIN 43 620 dimensional standards and rigorous performance criteria, delivering the high-speed clearing characteristics that sensitive semiconductor circuits require. With IEC ratings, CE marking, and a 100 kAIC interrupting rating, the 170M3239 gives professionals a dependable, code-compliant option for protecting critical power electronics.