Bussmann 170M3119 Eaton Series High-Speed Square Body Fuse, Class aR, 400A

Bussmann 170M3119 Eaton Series High-Speed Square Body Fuse, Class aR, 400A

The Bussmann 170M3119 is an Eaton Bussmann series high-speed square body fuse engineered for demanding semiconductor protection applications. Rated 400A with a 690V AC voltage rating (1250V IEC / 1300V UL per manufacturer specifications) and a 200 kAIC interrupting rating, this Class aR fuse is built to DIN 43 620 dimensions with blade end x blade end terminals for direct integration into power electronics assemblies. UL Recognized and CE Marked, it delivers the fast clearing performance required to protect sensitive semiconductor devices from short-circuit fault currents.

Key Features

• Amperage Rating: 400A, sized for high-current semiconductor protection circuits.
• Voltage Rating: 690V AC (1250V IEC / 1300V UL), suitable for demanding industrial power systems.
• Interrupting Rating: 200 kAIC for reliable clearing of high fault currents.
• Utilization Category: Class aR (accompanied semiconductor protection) for use alongside coordinated overcurrent devices.
• Square Body Construction: Slotted center bolted tags with blade end x blade end terminals, built to DIN 43 620 dimensions.
• Clearing Characteristics: Pre-arc I²t of 15,000 A²s and clearing I²t of 105,000 A²s at 660V for fast, predictable fault clearing.
• Clearing Loss: Rated clearing loss of 60 for efficient thermal performance.
• Packaging: Standard packaging type for straightforward stocking and handling.

Certifications & Compliance

• UL Recognized
• CE Marked

Technical Specifications

• Amperage Rating: 400 A
• Application: Semiconductor protection
• Certifications: UL Recognized
• Clearing I²t: 105000 at 660 V
• Clearing Loss: 60
• Compliances: CE Marked
• Fuse Shape: Square body, slotted center bolted tags
• Insulated Metal Gripping Lugs (IMGL): No
• Packaging Type: Standard
• Pre-Arc I²t: 15000
• Product Height: 65 mm
• Product Length/Depth: 305 mm
• Product Weight: 317 g
• Product Width: 145 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 690 V
• Voltage Type: AC

Typical Applications

• Semiconductor Device Protection
• Power Electronics and Rectifier Circuits
• High Fault-Current Industrial Systems
• Motor Drive and Power Conversion Equipment

Why Bussmann?

Bussmann by Eaton builds the 170M3119 to exacting DIN 43 620 dimensional standards with UL Recognized and CE Marked compliance, giving engineers confidence in fast, coordinated fault clearing for semiconductor protection. Its Class aR utilization category, 200 kAIC interrupting rating, and documented I²t characteristics support reliable, code-compliant performance in demanding industrial power electronics applications.