Bussmann 170M3113 High-Speed Square Body Fuse, 125A Class aR

Bussmann 170M3113 High-Speed Square Body Fuse, 125A Class aR

The Bussmann 170M3113 is an Eaton Bussmann series high-speed square body fuse engineered for demanding semiconductor protection duty, rated 700V (UL) / 690V (IEC) at 125A with a 200 kAIC interrupting rating. Built to the DIN 43 620 outline with blade end x blade end connections, this Class aR fuse is designed to work alongside semiconductor devices rather than provide stand-alone protection. It is UL Recognized and CE Marked, making it well suited to power electronics, converter, and rectifier circuits where fast clearing and high interrupting capacity are critical.

Key Features

• Electrical Rating: 700V (UL) / 690V (IEC), 125A with a 200 kAIC interrupting rating for high fault-current environments.
• Class aR Utilization: Accompanied semiconductor protection category, designed to work alongside other overcurrent devices in the circuit.
• Blade End x Blade End Connections: DIN 43 620 square body outline with slotted, center-bolted tags for secure high-speed fuse mounting.
• Fast-Clearing Characteristics: Pre-arc I2t of 550 and clearing I2t of 3700 at 660V help limit let-through energy to protect sensitive semiconductor devices.
• Compact Dimensions: 305 mm length/depth x 145 mm width x 65 mm height at approximately 320.8 g for straightforward panel integration.
• Clearing Loss: Rated clearing loss of 26 for predictable thermal performance under normal operation.

Certifications & Compliance

• UL Recognized
• CE Marked

Technical Specifications

• Amperage Rating: 125 A
• Application: semiconductor protection
• Certifications: UL Recognized
• Clearing I2t: 3700 at 660 V
• Clearing Loss: 26
• Compliances: CE Marked
• Fuse Shape: Square body, slotted center bolted tags
• Insulated Metal Gripping Lugs (Imgl): No
• Packaging Type: Standard
• Pre Arc I2t: 550
• Product Height: 65 mm
• Product Length Depth: 305 mm
• Product Weight: 320.8333333 g
• Product Width: 145 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 690 V
• Voltage Type: AC

Typical Applications

• Semiconductor Protection
• Power Converter and Rectifier Circuits
• High-Speed Industrial Power Electronics
• Panelboard and Switchgear Fusing for Fault-Current-Limited Circuits

Why Bussmann?

Bussmann fuses are built to precise DIN outline standards with characterized pre-arc and clearing I2t values so engineers can coordinate protection with confidence. The 170M3113 is UL Recognized and CE Marked, backing its 700V (UL) / 690V (IEC), 125A, 200 kAIC rating for reliable, code-aware performance in demanding semiconductor protection applications.