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Bussmann 170L8388 Eaton Series Class aR Square Body Fuse, 400A
The Bussmann 170L8388 is an Eaton Bussmann series high-speed square body fuse built for semiconductor protection in demanding power electronics applications. Rated 700V (UL) / 690V (IEC) with a 400A amperage rating, this Class aR fuse is designed for accompanied semiconductor protection, meaning it is intended to work alongside another protective device rather than as standalone branch-circuit protection. A top fuse status indicator provides quick visual confirmation of fuse condition, helping maintenance teams identify a blown fuse without removing it from service.
Key Features
- Amperage Rating: 400A high-speed rating suited for protecting semiconductor devices and power electronics circuits.
- Voltage Rating: Rated 700V (UL) and 690V (IEC), with a manufacturer voltage rating of 1000 V AC for demanding industrial power systems.
- Utilization Category: Class aR (accompanied semiconductor protection), engineered to work in coordination with a backup protective device.
- Fuse Shape: Square body construction with slotted, center bolted tags for secure busbar and bus-bar style mounting.
- Status Indicator: Top fuse status indicator allows fast visual confirmation of fuse condition during inspection.
- Application: Purpose-built for semiconductor protection in industrial power electronics equipment.
- Dimensions: Measures 280 mm in length/depth, 180 mm in width, and 65 mm in height, weighing 884 g.
- Gripping Lugs: Does not include insulated metal gripping lugs (IMGL).
Technical Specifications
- Amperage Rating: 400 A
- Application: semiconductor protection
- Compliances: Contact factory
- 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 Weight: 884 g
- Product Width: 180 mm
- Utilization Category: aR (accompanied semiconductor protection)
- Voltage Rating: 1000 V
- Voltage Type: AC
Typical Applications
- Semiconductor Protection Circuits
- High-Speed Fusing for Power Electronics
- Coordinated Protection Alongside a Backup Fuse (Class aR)
- Industrial and Commercial Power Distribution Equipment
Why Bussmann?
Bussmann by Eaton is a recognized name in circuit protection, and the 170L8388 reflects that with a purpose-built square body design, a Class aR utilization rating for accompanied semiconductor protection, and a top fuse status indicator for easier field verification. For engineers and technicians specifying high-speed fusing for semiconductor and power electronics equipment, the Bussmann 170L8388 delivers the coordinated, code-relevant protection these applications require.
Manufacturer Resources
Product Specs
- Amperage Rating:
- 400 A
- Application:
- semiconductor protection
- Class:
- Class aR
- Compliances:
- Contact factory
- Fuse Indicator:
- Top fuse status indicator
- 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 Weight:
- 884 g
- Product Width:
- 180 mm
- Utilization Category:
- aR (accompanied semiconductor protection)
- Voltage Rating:
- 1000 V
- Voltage Type:
- AC
- Product Group:
- Fuses
- Department:
- Electrical
- Product Subgroup:
- Other Fuses
- Product Type:
- Fuse
- Product Details:
- Fuse