Bussmann 170M5191 Eaton Series High Speed Square Body Fuse, Class aR

Bussmann 170M5191 Eaton Series High Speed Square Body Fuse, Class aR

The Bussmann 170M5191 is an Eaton Bussmann series high speed square body fuse engineered for semiconductor protection in demanding power electronics applications. Rated 700V (UL) / 690V (IEC) AC and 350A with a 100 kAIC interrupting rating, this Class aR fuse is built to DIN 43 620 dimensional standards and carries IEC rating and CE marking for compliant use across global installations.

Key Features

• Fuse Shape: Square body construction with slotted center bolted tags for secure, low-resistance terminal connections.
• Voltage Rating: 700V (UL) / 690V (IEC), with a 1250V AC voltage rating for demanding semiconductor circuit applications.
• Amperage Rating: 350A continuous current rating for dependable circuit protection.
• Interrupting Rating: 100 kAIC high fault-current interrupting capability.
• Utilization Category: Class aR (accompanied semiconductor protection) per DIN 43 620.
• Let-Through Energy: Pre-arc I2t of 16500 and clearing I2t of 97500 at 1000V / 135000 at 1250V for coordinated semiconductor device protection.
• Watt Losses: 80W rated power dissipation.
• Compact Dimensions: 284mm length/depth, 175mm width, 67mm height, weighing 634g.

Certifications & Compliance

• IEC Rated
• CE Marked

Technical Specifications

• Amperage Rating: 350 A
• Application: semiconductor protection
• Certifications: IEC Rated
• Clearing I2t: 97500 at 1000 V, 135000 at 1250 V
• Compliances: CE Marked
• Fuse Shape: Square body, slotted center bolted tags
• Insulated Metal Gripping Lugs (Imgl): No
• Packaging Type: Standard
• Pre Arc I2t: 16500
• Product Height: 67 mm
• Product Length Depth: 284 mm
• Product Weight: 634 g
• Product Width: 175 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 1250 V
• Voltage Type: AC
• Watt Losses: 80 W

Typical Applications

• Semiconductor Device Protection
• Power Electronics and Converter Circuits
• Industrial Drive and Rectifier Systems
• High Fault-Current Industrial Installations

Why Bussmann?

Bussmann by Eaton is a trusted name in circuit protection, and the 170M5191 reflects that legacy with a robust square body construction, precise let-through energy characteristics, and IEC/CE compliance. For engineers specifying reliable, code-compliant semiconductor protection, this Class aR fuse delivers consistent, coordinated performance backed by Eaton's established manufacturing standards.