Bussmann 170M4469 Eaton High-Speed Square Body Fuse, Class aR, 900A

Bussmann 170M4469 Eaton High-Speed Square Body Fuse, Class aR, 900A

The Bussmann 170M4469 is an Eaton Bussmann series high-speed square body fuse engineered for semiconductor protection in demanding power electronics applications. This Class aR fuse carries a 900A amperage rating with a 700V (UL) / 690V (IEC) voltage rating and a 200 kAIC interrupting rating, plus a 550V AC voltage rating per its listed electrical data. The square body design features flush end contacts for compact, high-density panel mounting, and the fuse is UL Recognized and CE Marked for coordinated, accompanied semiconductor device protection.

Key Features

• Amperage Rating: 900A for high-current semiconductor circuit protection.
• Voltage Rating: 700V (UL) / 690V (IEC), with a 550V AC rating listed for the fuse element, suited to demanding power electronics circuits.
• Interrupting Rating: 200 kAIC for reliable fault clearing in high-fault-current systems.
• Utilization Category: Class aR (accompanied semiconductor protection) for coordinated protection of power semiconductor devices.
• Fuse Shape: Square body with flush end contacts for a compact, flush-mount footprint.
• Clearing I2t: 85000 at 660V for predictable let-through energy during a fault.
• Pre-Arc I2t: 155000 for coordinated melting characteristics with upstream and downstream devices.
• Watt Losses: 100W rated power dissipation for thermal design planning.

Certifications & Compliance

• UL Recognized
• CE Marked

Technical Specifications

• Amperage Rating: 900 A
• Application: semiconductor protection
• Certifications: UL Recognized
• Clearing I2t: 85000 at 660 V
• Compliances: CE Marked
• Fuse Shape: Square body, flush end contacts
• Insulated Metal Gripping Lugs (IMGL): No
• Packaging Type: Standard
• Pre Arc I2t: 155000
• Product Height: 52 mm
• Product Length Depth: 170 mm
• Product Weight: 397.67 g
• Product Width: 72 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 550 V
• Voltage Type: AC
• Watt Losses: 100 W

Typical Applications

• Semiconductor Device Protection (Class aR Accompanied Use)
• Variable Frequency Drives and Power Conversion Equipment
• Industrial Rectifier and Converter Circuits
• High-Speed Circuit Protection in Panelboards and Switchgear
• OEM Power Electronics Assemblies

Why Bussmann?

Backed by the Eaton Bussmann series, the 170M4469 delivers the high-speed, Class aR semiconductor protection professionals rely on for coordinated fault clearing in demanding power electronics systems. Its 200 kAIC interrupting rating, UL Recognized and CE Marked status, and square body flush-contact design combine dependable performance with straightforward panel integration. Choose Bussmann for code-compliant, reliable protection of critical semiconductor devices.