Bussmann 170M-863 Class aR High-Speed Square Body Fuse

Bussmann 170M-863 Class aR High-Speed Square Body Fuse

The Bussmann 170M-863 is part of the Eaton Bussmann series of high-speed square body fuses engineered for demanding semiconductor protection applications, available in amp ratings from 400A through 1400A (400A, 500A, 550A, 630A, 900A, 1100A, and 1400A) to match the required current-limiting duty. Rated 240 Vac / 150 Vdc with interrupting capacity up to 125 kAIC, this Class aR fuse features a square body with slotted, center bolted tags, a top fuse status indicator for quick visual condition checks, and CE Marked compliance to DIN 43620 dimensional standards.

Key Features

• Amp Rating Range: Available across 400A, 500A, 550A, 630A, 900A, 1100A, and 1400A configurations for accompanied semiconductor protection.
• Voltage Rating: 240 Vac / 150 Vdc for use in both AC and DC power electronics circuits.
• Interrupt Rating: Up to 125 kAIC, delivering high fault-current interrupting performance.
• Fuse Shape: Square body construction with slotted, center bolted tags for a compact, secure mounting footprint.
• Top Status Indicator: Integrated top fuse status indicator provides fast visual confirmation of fuse condition without disassembly.
• Utilization Category: Class aR rating designed specifically for accompanied semiconductor protection duty.
• Dimensions: 95 mm width x 76 mm height x 168 mm length/depth footprint.
• Standard: Manufactured to DIN 43620 dimensional and mounting standards.

Certifications & Compliance

• CE Marked
• Manufactured to DIN 43620

Technical Specifications

• Voltage Type: AC
• Product Width: 95 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Packaging Type: Standard
• Fuse Shape: Square body, slotted center bolted tags
• Product Height: 76 mm
• Application: Semiconductor protection
• Insulated Metal Gripping Lugs (IMGL): No
• Compliances: CE Marked
• Product Length/Depth: 168 mm

Typical Applications

• Semiconductor Protection Circuits
• Industrial Power Electronics
• Motor Drives and Rectifier Assemblies
• DIN Rail and Panel-Mounted Enclosures
• Switchgear and Power Conversion Equipment

Why Bussmann?

Eaton Bussmann engineers its high-speed square body fuse line for the demanding current-limiting needs of semiconductor protection, backing the 170M series with CE Marked compliance and DIN 43620 standard construction. The square body design with slotted, center bolted tags and top fuse status indicator supports fast, reliable installation and condition checks across the full 400A-1400A range, making it a dependable choice for industrial power electronics professionals who need consistent, code-compliant performance.