Bussmann 170M3692 Class aR High-Speed Fuse, 125A

Bussmann 170M3692 Class aR High-Speed Fuse, 125A

The Bussmann 170M3692 is a Class aR high-speed fuse built for demanding semiconductor and power-electronics protection duties, rated 125A RMS with a 100 kAIC interrupt rating for high fault-current environments. Its square body US-style construction (without indicator) is engineered for DC common bus, DC drives, power converters/rectifiers, and reduced voltage starter applications. The fuse carries IEC Rated, UL Recognized, and CSA Certified listings, giving specifiers a compliant, code-ready protection device for industrial power electronics.

Key Features

• Amperage Rating: 125A RMS current rating for reliable overcurrent protection in high-power circuits.
• Fuse Class: Class aR high-speed fuse construction designed for semiconductor and power converter protection.
• Interrupt Rating: 100 kAIC interrupt rating supports use in high fault-current DC power systems.
• Clearing I2t: Clearing I2t of 9000 at 1000V and 11500 at 1250V for predictable let-through energy coordination.
• Pre-Arc I2t: Pre-arc I2t rating of 1450 for precise protection coordination.
• Watt Losses: 35W watt loss rating.
• Fuse Indicator: Non-indicating design.
• Application: Suited for DC common bus, DC drives, power converters/rectifiers, and reduced voltage starters.

Certifications & Compliance

• IEC Rated
• UL Recognized
• CSA Certified
• CE Marked
• RoHS Compliant

Technical Specifications

• Amperage Rating: 125A
• Application: DC common bus, DC drives, power converters/rectifiers, reduced voltage starters
• Class: Class aR
• Clearing I2t: Clearing at 1000V: 9000 , Clearing at 1250V: 11500
• Current Rating: 125A RMS
• Fuse Indicator: Non Indicating
• Interrupt Rating: 100 kAIC
• Packaging Type: Standard
• Pre Arc I2t: 1450
• Watt Losses: 35W
• Product Type: Square body US style, -FU/115 without indicator
• Product Length: 5.433 IN
• Product Details: Square body US style, -FU/115 without indicator
• Product Height: 2.087 IN
• Product Weight: 1.6456 LB
• Product Width: .315 IN

Typical Applications

• DC Common Bus Systems
• DC Drives
• Power Converters and Rectifiers
• Reduced Voltage Starters
• Industrial Power Electronics Protection

Why Bussmann?

Bussmann engineers its Class aR high-speed fuses for the demanding duty of protecting semiconductors and power conversion equipment, backing the 170M3692 with IEC Rated, UL Recognized, and CSA Certified listings plus CE marking and RoHS compliance. The 100 kAIC interrupt rating and documented clearing and pre-arc I2t data give engineers the performance information needed to coordinate protection in DC drive and power converter systems with confidence.