Bussmann 170M3904 Eaton Series High-Speed Square Body Fuse, 200A Class aR

Bussmann 170M3904 Eaton Series High-Speed Square Body Fuse, 200A Class aR

The Bussmann 170M3904 is an Eaton series high-speed square body fuse engineered for semiconductor protection in demanding power electronics applications. Rated 700V (UL) and 690V (IEC) with a 200A amperage rating and a 200 kAIC interrupt rating, this Class aR fuse combines a square body design with slotted center bolted tags and a top fuse status indicator for fast, at-a-glance visual verification of fuse condition. As an aR-utilization-category fuse, it is built to accompany semiconductor devices, providing reliable overcurrent protection where speed and interrupting capacity matter most.

Key Features

• Square Body Design: Slotted center bolted tags support secure, low-resistance mounting typical of high-speed semiconductor fuses.
• High Voltage Rating: Rated 700V under UL and 690V under IEC standards for use across both regulatory frameworks.
• 200A Amperage Rating: Delivers dependable current-carrying capacity sized for demanding power circuits.
• 200 kAIC Interrupt Rating: High interrupting capacity helps protect connected semiconductor equipment during fault conditions.
• Top Fuse Status Indicator: Built-in visual indicator allows technicians to quickly confirm fuse condition without additional test equipment.
• Class aR, Utilization Category aR: Classified as an accompanied semiconductor protection fuse, designed to work alongside semiconductor devices rather than as stand-alone branch-circuit protection.
• Semiconductor Protection Application: Purpose-built for protecting power semiconductor components in industrial and power conversion equipment.

Certifications & Compliance

• Rated to UL standards at 700V
• Rated to IEC standards at 690V

Technical Specifications

• Amperage Rating: 200 A
• Application: semiconductor protection
• Compliances: Contact factory
• Fuse Shape: Square body, slotted center bolted tags
• Insulated Metal Gripping Lugs (IMGL): No
• Packaging Type: Standard
• Product Height: 62 mm
• Product Length/Depth: 290 mm
• Product Weight: 349 g
• Product Width: 142 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 690 V
• Voltage Type: AC

Typical Applications

• Semiconductor Device Protection
• Power Conversion and Rectifier Circuits
• Industrial Motor Drive Protection
• High-Speed Overcurrent Protection in Power Electronics Equipment

Why Bussmann?

The Bussmann 170M3904 reflects the Eaton Bussmann series' focus on precision-engineered overcurrent protection, pairing a robust square body construction with a 200 kAIC interrupt rating and dual UL/IEC voltage ratings for use in demanding semiconductor protection roles. The built-in top fuse status indicator adds a practical layer of serviceability, helping maintenance teams verify fuse condition quickly and keep power conversion equipment running reliably.