Bussmann 170M4458 Eaton Series High-Speed Square Body Fuse, Class aR, 200A

Bussmann 170M4458 Eaton Series High-Speed Square Body Fuse, Class aR, 200A

The Bussmann 170M4458 is an Eaton series high-speed square body fuse engineered for demanding semiconductor protection applications. Rated 1300V (UL) and 1250V (IEC) with a 200A amperage rating and 200 kAIC interrupting capacity, this Class aR (accompanied semiconductor protection) fuse delivers fast-acting overcurrent protection in a compact square body with flush end contacts. Voltage rated at 690V AC, it is UL Recognized and CE Marked for use in power electronics and industrial control systems where coordinated semiconductor protection is required.

Key Features

• Electrical Rating: 1300V (UL) / 1250V (IEC), 200A, 200 kAIC for high-capacity fault current interruption in demanding circuits.
• Utilization Category: Class aR (accompanied semiconductor protection) for coordinated use alongside upstream circuit protection in semiconductor branch circuits.
• Fuse Shape: Square body design with flush end contacts for compact, space-efficient panel and busbar mounting.
• Clearing I2t: 11500 A2s at 660V for predictable, controlled let-through energy during fault clearing.
• Pre-Arc I2t: 1650 A2s for precise coordination with the semiconductor devices it protects.
• Voltage Rating: 690V, AC voltage type, suited to medium-voltage power electronic circuits.
• Watt Losses: 45W power dissipation rating for accurate thermal and enclosure design.
• Gripping Lugs: No insulated metal gripping lugs (IMGL), consistent with its flush-end square body format.

Certifications & Compliance

• UL Recognized
• CE Marked

Technical Specifications

• Amperage Rating: 200 A
• Application: semiconductor protection
• Certifications: UL Recognized
• Clearing I2t: 11500 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: 1650
• Product Height: 63 mm
• Product Length Depth: 107 mm
• Product Weight: 393.6666667 g
• Product Width: 53 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 690 V
• Voltage Type: AC
• Watt Losses: 45 W

Typical Applications

• Semiconductor Device Protection
• Power Electronics and Converter Circuits
• High-Speed Fault Current Interruption
• Industrial Power Electronic Systems
• Coordinated Branch Circuit Protection

Why Bussmann?

Bussmann by Eaton engineers the 170M4458 with a Class aR utilization category, precise Pre-Arc and Clearing I2t characteristics, and a rugged square body construction with flush end contacts for reliable coordination in semiconductor protection circuits. Backed by UL Recognition and CE Marking, it delivers code-compliant, high-speed overcurrent protection for professional power electronics applications where precision and reliability are essential.