Bussmann 170M4461 Eaton Class aR High-Speed Square Body Fuse, 350A

Bussmann 170M4461 Eaton Class aR High-Speed Square Body Fuse, 350A

The Bussmann 170M4461 is an Eaton series high-speed square body fuse purpose-built for semiconductor protection in demanding power electronics and industrial control applications. This Class aR fuse is rated 1300V (UL) / 1250V (IEC), 350A, with a 200 kAIC interrupting rating, and features a square body design with flush end contacts for straightforward installation into compatible high-speed fuse mounting hardware. As an accompanied semiconductor protection (aR) device, the 170M4461 is engineered to work in coordination with upstream overcurrent protection to safeguard sensitive power semiconductors from damaging fault currents.

Key Features

• Amperage Rating: 350A for robust protection of high-current semiconductor circuits.
• Voltage Rating: 1300V (UL) / 1250V (IEC) supports use in high-voltage power electronics and drive systems.
• Interrupting Rating: 200 kAIC delivers dependable clearing performance during high-fault-current conditions.
• Fuse Shape: Square body construction with flush end contacts for compatibility with standard high-speed fuse mounts.
• Utilization Category: Class aR (accompanied semiconductor protection), designed to be coordinated with other overcurrent devices rather than used for stand-alone branch-circuit protection.
• Clearing I2t: 59,000 at 660V for predictable current limitation during fault clearing.
• Pre-Arc I2t: 8,500 supports accurate coordination with upstream and downstream protective devices.
• Watt Losses: 60W power dissipation rating.

Certifications & Compliance

• IEC Rated
• CE Marked

Technical Specifications

• Amperage Rating: 350 A
• Application: semiconductor protection
• Certifications: IEC Rated
• Clearing I2t: 59000 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: 8500
• Product Height: 51 mm
• Product Length Depth: 70 mm
• Product Weight: 134.3333333 g
• Product Width: 51 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 690 V
• Voltage Type: AC
• Watt Losses: 60 W

Typical Applications

• Semiconductor Protection Circuits
• Power Electronics and Variable Frequency Drive Systems
• Industrial Motor Control Equipment
• Coordinated Overcurrent Protection Schemes
• High-Speed Fuse Replacement in Panelboards and Switchgear

Why Bussmann?

Bussmann by Eaton is a trusted name in circuit protection, and the 170M4461 reflects that reputation with a 200 kAIC interrupting rating, IEC-rated performance, and CE marked compliance for demanding industrial environments. Its Class aR utilization category and square body, flush-end-contact design make it a dependable choice for engineers coordinating semiconductor protection with upstream overcurrent devices. Choose Bussmann for reliable, code-compliant overcurrent protection in professional electrical power applications.