Bussmann 170E8078 Eaton High-Speed Square Body Fuse, 550A Class aR

Bussmann 170E8078 Eaton High-Speed Square Body Fuse, 550A Class aR

The Bussmann 170E8078 is an Eaton Bussmann series high-speed square body fuse engineered for demanding industrial power circuits requiring fast-acting, coordinated overcurrent protection. Rated 550A at 1000V AC, this fuse carries a Class aR utilization category (accompanied semiconductor protection), meaning it is designed to work alongside other overcurrent protective devices to safeguard sensitive semiconductor components. The square body design features slotted center bolted tags for a secure, low-resistance connection in high-current bus and switchgear applications.

Key Features

• Amperage Rating: 550A for reliable protection of high-current industrial circuits.
• Voltage Rating: 1000V AC, suited for high-voltage power distribution and semiconductor protection systems.
• Utilization Category: Class aR (accompanied semiconductor protection) for coordinated protection of semiconductor devices such as rectifiers, drives, and converters.
• Fuse Shape: Square body construction with slotted center bolted tags for a secure, low-resistance mounting connection.
• Insulated Metal Gripping Lugs: Not equipped (IMGL: No), per manufacturer specification.
• Packaging Type: Standard packaging for straightforward stocking and installation.

Technical Specifications

• Amperage Rating: 550 A
• Voltage Rating: 1000 V
• Voltage Type: AC
• Utilization Category: aR (accompanied semiconductor protection)
• Fuse Shape: Square body, slotted center bolted tags
• Insulated Metal Gripping Lugs (IMGL): No
• Packaging Type: Standard
• Product Height: 65 mm
• Product Length/Depth: 280 mm
• Product Width: 180 mm
• Product Weight: 1883 g
• Compliances: Contact factory

Typical Applications

• Semiconductor Device Protection (Rectifiers, Drives, Converters)
• Industrial Power Distribution Systems
• Motor Control Centers and Switchgear
• High-Current Power Electronics Circuits
• Coordinated Overcurrent Protection Schemes
• Industrial Bus Duct and Panelboard Systems

Why Bussmann?

Bussmann by Eaton is a trusted name in circuit protection, and the 170E8078 high-speed square body fuse reflects that standard with its 550A, 1000V AC rating and Class aR accompanied semiconductor protection design. The bolted-tag square body construction supports secure, low-resistance connections for professional industrial installations. For complete compliance details and application guidance, contact the factory as noted in the manufacturer documentation.