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Bussmann 170M4445 Eaton Series Class aR High-Speed Square Body Fuse, 500A
The Bussmann 170M4445 is an Eaton Bussmann series high-speed square body fuse built for semiconductor protection in demanding power electronics systems. Rated 700V (UL) / 690V (IEC) at 500A with a 100 kAIC interrupt rating, this Class aR fuse delivers accompanied semiconductor protection (Utilization Category aR) with a square body and flush end contacts for compact panel mounting. It is UL Recognized and CE Marked for use in industrial drives, rectifiers, and other power conversion equipment.
Key Features
- Amperage Rating: 500A for high-current semiconductor circuit protection.
- Dual Voltage Rating: 700V (UL) and 690V (IEC), with a maximum voltage rating of 1250 V AC, supporting both UL and IEC-compliant installations.
- Interrupt Rating: 100 kAIC for reliable interruption of high fault currents.
- Fuse Shape: Square body with flush end contacts for compact, high-density mounting.
- Utilization Category: Class aR (accompanied semiconductor protection) for protecting semiconductor devices such as SCRs and diodes.
- I2t Ratings: Pre-arc I2t of 69,500 and clearing I2t of 340,000 at 1000 V / 435,000 at 1250 V for coordinated overcurrent protection design.
- Watt Losses: 85 W.
- Gripping Lugs: No insulated metal gripping lugs (IMGL).
Certifications & Compliance
- UL Recognized
- CE Marked
Technical Specifications
- Amperage Rating: 500 A
- Application: semiconductor protection
- Certifications: UL Recognized
- Clearing I2t: 340000 at 1000 V, 435000 at 1250 V
- Compliances: CE Marked
- Fuse Shape: Square body, flush end contacts
- Insulated Metal Gripping Lugs (IMGL): No
- Packaging Type: Standard
- Pre Arc I2t: 69500
- Product Height: 51 mm
- Product Length Depth: 160 mm
- Product Weight: .573 g
- Product Width: 70 mm
- Utilization Category: aR (accompanied semiconductor protection)
- Voltage Rating: 1250 V
- Voltage Type: AC
- Watt Losses: 85 W
Typical Applications
- Semiconductor Protection
- Industrial Motor Drives and Rectifiers
- Power Conversion Equipment
- Industrial Control Panels and Switchgear
Why Bussmann?
Bussmann by Eaton engineers the 170M4445 with a square body, flush end contact design, UL Recognized and CE Marked construction to deliver dependable, code-compliant semiconductor protection. With a 100 kAIC interrupt rating and Class aR accompanied semiconductor protection, it is built for coordinated protection in demanding industrial power electronics environments.
Manufacturer Resources
Product Specs
- Amperage Rating:
- 500 A
- Application:
- semiconductor protection
- Certifications:
- UL Recognized
- Class:
- Class aR
- Clearing I2t:
- 340000 at 1000 V, 435000 at 1250 V
- Compliances:
- CE Marked
- Fuse Indicator:
- Other
- Fuse Shape:
- Square body, flush end contacts
- Insulated Metal Gripping Lugs Imgl:
- No
- Interrupt Rating:
- 100 kAIC
- Mounting Method:
- Flush
- Packaging Type:
- Standard
- Pre Arc I2t:
- 69500
- Product Height:
- 51 mm
- Product Length Depth:
- 160 mm
- Product Weight:
- .573 g
- Product Width:
- 70 mm
- Utilization Category:
- aR (accompanied semiconductor protection)
- Voltage Rating:
- 1250 V
- Voltage Type:
- AC
- Watt Losses:
- 85 W
- Product Group:
- Fuses
- Department:
- Electrical
- Product Subgroup:
- Other Fuses
- Product Type:
- Fuse
- Product Details:
- Fuse
Bussmann 170M4445 – Frequently Asked Questions
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Does the Bussmann 170M4445 come with a warranty?
Absolutely. The Bussmann 170M4445 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Bussmann 170M4445?
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