Bussmann 170M3198 High-Speed Square Body Fuse, Class aR, 400A, 700V

Bussmann 170M3198 High-Speed Square Body Fuse, Class aR, 400A, 700V

The Bussmann 170M3198 is an Eaton Bussmann series high-speed square body fuse built to DIN 43 620 dimensions, rated 700V (UL) and 690V (IEC) with a 400A amperage rating and a 100 kAIC interrupt rating. Classified as Utilization Category aR (accompanied semiconductor protection), this fuse is engineered specifically for semiconductor protection applications where fast, precise clearing of overcurrent faults is critical to safeguarding power electronics, SCRs, and rectifier assemblies. Its square body, slotted center bolted-tag design allows for secure, low-resistance bus bar connections in demanding industrial power circuits.

Key Features

• Amperage Rating: 400A for high-speed protection of semiconductor and power electronic circuits.
• Voltage Rating: 700V (UL), 690V (IEC), with a 1250V voltage rating per applicable IEC standard.
• Interrupt Rating: 100 kAIC for reliable performance under high fault-current conditions.
• Fuse Shape: Square body with slotted center bolted tags, built to DIN 43 620 dimensions for compatible bus bar mounting.
• Utilization Category: Class aR (accompanied semiconductor protection) for precise coordination with semiconductor devices.
• Clearing I²t: 265,000 at 1000V and 335,000 at 1250V; Pre-Arc I²t rated at 53,000.
• Watt Losses: 70W rated power loss for thermal design planning.

Certifications & Compliance

• IEC Rated
• CE Marked

Technical Specifications

• Amperage Rating: 400 A
• Application: semiconductor protection
• Certifications: IEC Rated
• Clearing I2t: 265000 at 1000 V, 335000 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: 53000
• Product Height: 65 mm
• Product Length/Depth: 305 mm
• Product Weight: 72 g
• Product Width: 145 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 1250 V
• Voltage Type: AC
• Watt Losses: 70 W

Typical Applications

• Semiconductor Protection for SCRs and Rectifiers
• Power Electronics and Variable Frequency Drive Circuits
• Industrial Motor Control and Power Conversion Equipment
• High-Speed Circuit Protection in Panelboards and Switchgear
• Commercial and Industrial Power Distribution Systems

Why Bussmann?

Bussmann by Eaton is a recognized name in circuit protection, and the 170M3198 reflects that standard with a square body, slotted center bolted-tag construction built to DIN 43 620 dimensions for dependable bus bar mounting. With a 100 kAIC interrupt rating, Class aR utilization category, and IEC-rated, CE-marked compliance, this fuse delivers the fast, coordinated clearing performance semiconductor protection applications demand. It's a dependable choice for professionals specifying high-speed fuses in industrial power electronics and control systems.