Bussmann 170M3666 Eaton Series High-Speed Square Body Fuse, 250A Class aR

Bussmann 170M3666 Eaton Series High-Speed Square Body Fuse, 250A Class aR

The Bussmann 170M3666 is an Eaton series high-speed square body fuse engineered for semiconductor protection in demanding AC power circuits. Rated 700V (UL) and 690V (IEC) with a 250A amperage rating and a 200 kAIC interrupt rating, this Class aR (accompanied semiconductor protection) fuse is built with blade end x blade end terminations for secure, low-resistance connections. The fuse carries UL Recognized certification and is CE Marked, making it suitable for professional industrial and power electronic applications where fast, reliable overcurrent protection is essential.

Key Features

• Dual Voltage Rating: 700V (UL) and 690V (IEC) AC voltage rating supports both UL and IEC-compliant installations.
• Amperage Rating: 250A rating delivers dependable overcurrent protection for semiconductor circuits.
• High Interrupt Capacity: 200 kAIC interrupt rating provides robust short-circuit protection in high-fault-current systems.
• Class aR Utilization Category: Accompanied semiconductor protection design for coordinated protection of power semiconductor devices.
• Square Body Construction: Square body fuse shape with center bolted tags and blade end x blade end terminations for a secure mechanical and electrical connection.
• Fast-Acting Response: Pre-arc I2t of 4200 and clearing I2t of 28500 at 660V deliver the high-speed current-limiting response required for semiconductor protection.
• Low Watt Losses: 40W watt losses help minimize heat generation during continuous operation.

Certifications & Compliance

• UL Recognized
• CE Marked

Technical Specifications

• Amperage Rating: 250 A
• Application: semiconductor protection
• Certifications: UL Recognized
• Clearing I2t: 28500 at 660 V
• Compliances: CE Marked
• Fuse Shape: Square body, center bolted tags
• Insulated Metal Gripping Lugs (IMGL): No
• Packaging Type: Standard
• Pre Arc I2t: 4200
• Product Height: 65 mm
• Product Length Depth: 305 mm
• Product Weight: 319 g
• Product Width: 145 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 690 V
• Voltage Type: AC
• Watt Losses: 40 W

Typical Applications

• Semiconductor Device Protection
• High-Speed Overcurrent Protection in AC Power Circuits
• Industrial Power Electronics and Converter Systems
• Coordinated Protection with Power Semiconductor Devices (Class aR)

Why Bussmann?

Bussmann by Eaton engineers the 170M3666 high-speed fuse with precise pre-arc and clearing I2t characteristics to deliver the fast-acting, current-limiting performance that semiconductor protection demands. With UL Recognized certification, CE Marked compliance, and a rugged square body design with blade end x blade end terminations, this fuse offers the reliable, code-compliant performance professionals expect for critical power electronic and industrial applications.