Bussmann 170M3907 Eaton Series High-Speed Square Body Fuse, 350A 690V Class aR

Bussmann 170M3907 Eaton Series High-Speed Square Body Fuse, 350A 690V Class aR

This Eaton Bussmann series high-speed square body fuse is engineered for demanding industrial overcurrent protection applications. Rated 350A and 690V, this Class aR fuse delivers fast-acting protection for power electronics, semiconductor devices, rectifiers, and other high-speed switching circuits where standard time-delay fuses cannot respond quickly enough to prevent damage. Its square body construction is built to standardized dimensions for reliable, code-compliant performance in industrial power distribution and motor drive systems that demand precise, rapid interruption of fault current.

Key Features

• Amperage Rating: 350A provides robust overcurrent protection for high-power industrial circuits and equipment.
• Voltage Rating: 700V (UL), 690V (IEC) supports use in high-voltage industrial power distribution systems worldwide.
• Fuse Class: Class aR high-speed design is optimized specifically for the protection of semiconductor devices, rectifiers, and inverter circuits rather than general branch-circuit backup duty.
• Square Body Construction: Standardized square body format for compatibility with common industrial fuse holders, disconnects, and mounting hardware.
• Fuse Indicator: Non-Indicating design, suited to installations that do not require a visual blown-fuse indicator.
• Packaging: Standard packaging configuration for straightforward stocking and replacement.

Technical Specifications

• Amperage Rating: 350 A
• Class: Class aR
• Fuse Indicator: Non Indicating
• Packaging Type: Standard
• Voltage Rating: 700 V (UL), 690 V (IEC)

Typical Applications

• Industrial Motor Drives and Variable Frequency Drives
• Power Electronics and Rectifier Circuit Protection
• Semiconductor Device Protection
• Industrial Control Panels and Switchgear
• High-Speed Overcurrent Protection in Demanding Industrial Power Systems

Why Bussmann?

Bussmann by Eaton is a long-recognized name in circuit protection, and this high-speed square body fuse reflects that standard with a Class aR rating built specifically for the fast-acting demands of semiconductor and rectifier circuit protection. With a 350A, 690V rating, standardized square body construction, and a Non-Indicating design, it is engineered for dependable, code-compliant performance in professional industrial electrical installations where speed and reliability of fault clearing are critical to protecting sensitive downstream equipment.