Bussmann 170L-403 Eaton Series Class aR High-Speed Square Body Fuse

Bussmann 170L-403 Eaton Series Class aR High-Speed Square Body Fuse

Bussmann's 170L-403 Eaton Series high-speed square body fuse delivers dedicated semiconductor protection with a Class aR utilization rating and dual voltage ratings of 700V (UL) and 690V (IEC). Built for demanding power electronics applications, this fuse is available in 50A, 100A, and 200A ratings to match a range of accompanied semiconductor protection needs across drives, converters, and other AC-powered equipment. A top-mounted fuse status indicator gives installers and maintenance teams a fast visual check on fuse condition without disconnecting equipment, helping reduce troubleshooting time during scheduled maintenance.

Key Features

• Amp Rating Range: Available in 50A, 100A, and 200A ratings to cover a range of accompanied semiconductor protection loads.
• Dual Voltage Rating: Rated 700V (UL) and 690V (IEC) for use across both UL and IEC-governed installations.
• Class aR Utilization: Designed for accompanied semiconductor protection, per the Class aR utilization category.
• Square Body Design: Square body fuse construction for compatibility with standard high-speed fuse mounting hardware and fuse blocks.
• Top Status Indicator: Integrated top fuse status indicator provides quick visual confirmation of fuse condition without removing the fuse.
• AC Voltage Type: Rated for AC voltage type applications.
• Standard Packaging: Supplied in standard packaging configuration for straightforward stocking and distribution.

Certifications & Compliance

• UL Rated to 700V
• IEC Rated to 690V

Technical Specifications

• Voltage Type: AC
• Utilization Category: aR (accompanied semiconductor protection)
• Packaging Type: Standard
• Application: semiconductor protection
• Insulated Metal Gripping Lugs Imgl: No
• Compliances: Contact factory

Typical Applications

• Semiconductor Protection Circuits
• Power Electronics and Drive Systems
• Industrial Control Panels
• High-Speed Fuse Protection for OEM Equipment
• Rectifier and Converter Circuit Protection

Why Bussmann?

Bussmann Eaton Series fuses are engineered for reliable, code-compliant performance in demanding electrical environments. With Class aR utilization, dual UL and IEC voltage ratings, and a top status indicator for fast field verification, the 170L-403 series delivers the accompanied semiconductor protection that industrial and OEM electrical systems depend on. Choosing a fuse purpose-built to the Class aR utilization category, rather than a general-purpose fuse, helps ensure the connected semiconductor devices stay protected under the specific fault conditions they are most exposed to.