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Bussmann 170M3742 Class aR High Speed Fuse, 1000V 125A
The Bussmann 170M3742 is a Class aR high speed fuse engineered for demanding power conversion applications, rated 1000 Vac and 125A RMS with a 100 kAIC interrupt rating. Its high-speed, current-limiting design protects DC common bus systems, DC drives, power converters and rectifiers, and reduced voltage starters from short-circuit and overcurrent damage. Certified to CSA, UL Recognized, and IEC standards, this fuse delivers dependable protection for industrial power distribution equipment.
Key Features
- Voltage Rating: 1000 Vac for use in high-voltage DC power conversion systems.
- Amperage Rating: 125A RMS current rating for reliable circuit protection.
- Interrupt Rating: 100 kAIC for high fault-current interruption capability.
- Class aR Design: High speed fuse construction suited for semiconductor and drive protection duty.
- Application: Purpose-built for DC common bus, DC drives, power converters/rectifiers, and reduced voltage starters.
- Fuse Indicator: Non Indicating design.
- Watt Losses: 35W rated power dissipation.
- Clearing I2t: 9000 at 1000V and 11500 at 1250V, with a Pre-Arc I2t of 1450.
Certifications & Compliance
- CSA Certified
- UL Recognized
- IEC Rated
- CE Marked
- RoHS Compliant
Technical Specifications
- Amperage Rating: 125A
- Application: DC common bus, DC drives, power converters/rectifiers, reduced voltage starters
- Class: Class aR
- Clearing I2t: Clearing at 1000V: 9000, Clearing at 1250V: 11500
- Current Rating: 125A RMS
- Fuse Indicator: Non Indicating
- Interrupt Rating: 100 kAIC
- Packaging Type: Standard
- Pre Arc I2t: 1450
- Voltage Rating: 1000 Vac
- Watt Losses: 35W
- Product Type: Square body US style, -FKE/115 type K indicator for micro
- Product Length: 5.433 IN
- Product Details: Square body US style, -FKE/115 type K indicator for micro
- Product Height: 2.087 IN
- Product Weight: 1.6456 LB
- Product Width: .315 IN
Typical Applications
- DC Common Bus Systems
- DC Drives
- Power Converters and Rectifiers
- Reduced Voltage Starters
- Industrial Power Distribution Equipment
Why Bussmann?
Bussmann high speed fuses like the 170M3742 combine a 100 kAIC interrupt rating with CSA, UL, and IEC certification for dependable, code-compliant protection in demanding DC power conversion systems. The Class aR design and documented clearing and pre-arc I2t characteristics give engineers the data needed to coordinate protection with confidence. Choose Bussmann for consistent, reliable performance in critical industrial power applications.
Manufacturer Resources
Product Specs
- Amperage Rating:
- 125A
- Class:
- Class aR
- Clearing I2t:
- Clearing at 1000V: 9000 , Clearing at 1250V: 11500
- Current Rating:
- 125A RMS
- Fuse Indicator:
- Non Indicating
- Interrupt Rating:
- 100 kAIC
- Packaging Type:
- Standard
- Pre Arc I2t:
- 1450
- Voltage Rating:
- 1000 Vac
- Watt Losses:
- 35W
- Product Group:
- Fuses
- Department:
- Electrical
- Product Subgroup:
- Other Fuses
- Product Type:
- Fuse
- Product Length:
- 5.433 IN
- Product Height:
- 2.087 IN
- Product Weight:
- 1.6456 LB
- Product Width:
- .315 IN