Bussmann 170M3458 Eaton Series High-Speed Square Body Fuse, Class aR

Bussmann 170M3458 Eaton Series High-Speed Square Body Fuse, Class aR

The Bussmann 170M3458 is an Eaton Bussmann series high-speed square body fuse engineered for demanding semiconductor protection applications. Rated 700V (UL) / 690V (IEC) AC and 40A, this Class aR fuse delivers a 200 kAIC interrupting rating with flush end contacts for compact panel mounting. Backed by IEC Rated and CE Marked compliance, it is built to protect power semiconductor circuits where fast, reliable current-limiting performance is critical.

Key Features

• Voltage Rating: 700V (UL) / 690V (IEC), AC, for high-voltage industrial circuits.
• Amperage Rating: 40A for accurate current-carrying capacity in semiconductor protection circuits.
• Interrupting Rating: 200 kAIC high-speed interruption limits let-through energy during fault conditions.
• Fuse Class: Class aR, Utilization Category aR (accompanied semiconductor protection) for coordinated overcurrent protection.
• Fuse Shape: Square body construction with flush end contacts for space-saving panel installation.
• Clearing/Pre-Arc I2t: Clearing I2t 270 at 660V; Pre-Arc I2t 40, supporting precise coordination with protected semiconductor devices.
• Watt Losses: 11W for efficient thermal performance in continuous operation.
• Application: Purpose-built for semiconductor protection duty.

Certifications & Compliance

• IEC Rated
• CE Marked

Technical Specifications

• Amperage Rating: 40 A
• Application: semiconductor protection
• Certifications: IEC Rated
• Clearing I2t: 270 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: 40
• Product Height: 47 mm
• Product Length Depth: 193 mm
• Product Weight: 245.3333333 g
• Product Width: 106 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 690 V
• Voltage Type: AC
• Watt Losses: 11 W

Typical Applications

• Semiconductor Protection
• Power Semiconductor and Converter Circuits
• High-Voltage AC Power Distribution up to 690V/700V
• Fast-Acting Fault Current Interruption
• Industrial Power Electronics Equipment

Why Bussmann?

Bussmann by Eaton is a recognized name in circuit protection, and the 170M3458 reflects that engineering standard with a robust square body construction, flush end contacts, and a 200 kAIC interrupting rating for demanding semiconductor protection duty. With IEC Rated and CE Marked compliance, this Class aR fuse is suited for professional installations that require dependable, code-compliant overcurrent protection.