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Bussmann High-Speed Class aR Fuse, 450A 1250V
This Bussmann High-Speed (HS) Class aR fuse is engineered for semiconductor and power-electronics circuit protection, rated 450A at 1250V for demanding DC applications. Built in a square-body US-style design (-FU/115 without indicator), it carries a 700V (UL) / 690V (IEC) voltage rating and a 100 kAIC interrupt rating, making it well suited for DC common bus, DC drives, power converters/rectifiers, and reduced voltage starter applications. This fuse is IEC rated and CE marked for use in professional industrial power systems.
Key Features
- Amperage Rating: 450A for high-current DC circuit protection.
- Voltage Rating: 1250V rating, with a 700V (UL) / 690V (IEC) standards rating for demanding DC power applications.
- Class aR Construction: High-Speed (HS), square-body US-style design (-FU/115 without indicator) built for semiconductor protection.
- Interrupt Rating: 100 kAIC for reliable interruption of high fault currents.
- Let-Through Energy: Clearing I²t of 185,000 at 1000V and 245,000 at 1250V, with a pre-arc I²t of 31,000 for coordinated system protection.
- Watt Losses: Rated at 100W.
- Non-Indicating Design: Standard non-indicating fuse body.
- Application: Suited for DC common bus, DC drives, power converters/rectifiers, and reduced voltage starters.
Certifications & Compliance
- IEC Rated
- CE Marked
Technical Specifications
- Amperage Rating: 450 A
- Application: DC common bus, DC drives, power converters/rectifiers, reduced voltage starters
- Certifications: IEC Rated
- Class: Class aR
- Clearing I²t: 185000 at 1000 V, 245000 at 1250 V
- Compliances: CE Marked
- Fuse Indicator: Non Indicating
- Interrupt Rating: 100 kAIC
- Packaging Type: Standard
- Pre Arc I²t: 31000
- Voltage Rating: 700 V (UL), 690 V (IEC)
- Watt Losses: 100 W
- Product Type: Square body US style, -FU/115 without indicator
Typical Applications
- DC Common Bus Protection
- DC Drive Systems
- Power Converters and Rectifiers
- Reduced Voltage Starters
- Industrial Power Electronics Installations
Why Bussmann?
Bussmann is a trusted name in circuit protection, and this Class aR fuse reflects that standard with its high-speed, IEC-rated, CE-marked construction built for demanding DC power applications. With a 100 kAIC interrupt rating and coordinated clearing characteristics, it delivers dependable, code-compliant protection for semiconductor and power-electronics equipment in professional industrial settings.
Manufacturer Resources
Product Specs
- Amperage Rating:
- 450 A
- Certifications:
- IEC Rated
- Class:
- Class aR
- Clearing I2t:
- 185000 at 1000 V, 245000 at 1250 V
- Compliances:
- CE Marked
- Fuse Indicator:
- Non Indicating
- Interrupt Rating:
- 100 kAIC
- Packaging Type:
- Standard
- Pre Arc I2t:
- 31000
- Product Height:
- .001 mm
- Product Length Depth:
- .001 mm
- Product Weight:
- .001 g
- Product Width:
- .001 mm
- Voltage Rating:
- 700 V (UL), 690 V (IEC)
- Watt Losses:
- 100 W
- Product Group:
- Fuses
- Department:
- Electrical
- Product Subgroup:
- Other Fuses
- Product Type:
- Fuse
- Product Details:
- Square body US style, -FU/115 without indicator