Bussmann 170M4447 Eaton Series High-Speed Square Body Fuse, Class aR, 630A

Bussmann 170M4447 Eaton Series High-Speed Square Body Fuse, Class aR, 630A

The Bussmann 170M4447 is an Eaton series high-speed square body fuse engineered for demanding semiconductor protection applications. Rated 700V (UL) and 550V (IEC) with a 630A amperage rating and a 100 kAIC interrupt rating, this Class aR fuse is purpose-built for accompanied semiconductor protection where fast, precise fault clearing is critical. Its square body design with flush end contacts supports compact, high-density mounting in power electronics assemblies.

Key Features

• Dual Voltage Rating: Rated 700V (UL) and 550V (IEC), with a 1100 V voltage rating for demanding power circuits.
• Amperage Rating: 630A continuous current rating suited for high-power semiconductor protection.
• Interrupt Rating: 100 kAIC interrupting capacity for reliable protection under high fault-current conditions.
• Fuse Class: Class aR, Utilization Category aR (accompanied semiconductor protection), engineered for high-speed clearing.
• Square Body Construction: Square body with flush end contacts for compact, high-speed fuse mounting.
• Compact Dimensions: Measures 160 mm (length/depth) x 70 mm (width) x 51 mm (height), weighing 2173 g.
• Let-Through Energy: Pre-arc I2t of 130000 and clearing I2t of 660000 at 1000 V for coordinated protection of semiconductor devices.
• Watt Losses: 100 W watt loss rating.

Certifications & Compliance

• IEC Rated
• CE Marked
• Rated to UL standards at 700V and IEC standards at 550V

Technical Specifications

• Amperage Rating: 630 A
• Application: semiconductor protection
• Certifications: IEC Rated
• Clearing I2t: 660000 at 1000 V
• Compliances: CE Marked
• Fuse Shape: Square body, flush end contacts
• Insulated Metal Gripping Lugs (IMGL): No
• Packaging Type: Standard
• Pre Arc I2t: 130000
• Product Height: 51 mm
• Product Length Depth: 160 mm
• Product Weight: 2173 g
• Product Width: 70 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 1100 V
• Voltage Type: AC
• Watt Losses: 100 W

Typical Applications

• Semiconductor Protection
• Power Electronics and Converter Circuits
• Industrial Drives and Rectifier Systems
• High-Speed Fault Protection for Solid-State Devices

Why Bussmann?

Bussmann by Eaton engineers this high-speed square body fuse to CE marked and IEC rated standards, backed by a 100 kAIC interrupt rating and precise pre-arc and clearing I2t performance for coordinated semiconductor protection. For professionals specifying Class aR protection in demanding power electronics systems, the 170M4447 delivers dependable, code-aligned performance and consistent quality for critical electrical installations.