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Bussmann 170M3145 High-Speed Square Body Fuse, Class aR, 250A
Model: BUSS-170M3145
Bussmann
Bussmann 170M5738 Class aR High Speed Fuse, 250A/1000V
The Bussmann 170M5738 is a Class aR high speed fuse engineered for semiconductor and power electronics protection, rated 250A RMS at 1000 Vac with a 100 kAIC interrupt rating. Its square body US-style construction is built for demanding DC applications, including DC common bus systems, DC drives, power converters/rectifiers, and reduced voltage starters. With a non-indicating design and low 65W watt loss, this fuse delivers fast-acting protection while minimizing thermal impact on the enclosure. Certified to CSA, IEC, and UL Recognized standards, it is a dependable choice for industrial power distribution where speed and reliability are critical.
Key Features
- Current Rating: 250A RMS for high-capacity circuit protection.
- Voltage Rating: 1000 Vac for demanding industrial power systems.
- Class aR Design: High speed fuse construction suited for semiconductor and power electronics protection.
- Interrupt Rating: 100 kAIC for reliable performance under high fault-current conditions.
- Fuse Indicator: Non-indicating body style for standard applications.
- Watt Losses: 65W, supporting efficient thermal performance.
- I2t Characteristics: Pre-arc I2t of 6500; clearing I2t of 38500 at 1000V and 51500 at 1250V for predictable let-through energy.
- Application Range: Suited for DC common bus, DC drives, power converters/rectifiers, and reduced voltage starters.
Certifications & Compliance
- CSA Certified
- IEC Rated
- UL Recognized
- CE Marked
- RoHS Compliant
Technical Specifications
- Amperage Rating: 250A
- Application: DC common bus, DC drives, power converters/rectifiers, reduced voltage starters
- Class: Class aR
- Clearing I2t: Clearing at 1000V: 38500, Clearing at 1250V: 51500
- Current Rating: 250A RMS
- Fuse Indicator: Non Indicating
- Interrupt Rating: 100 kAIC
- Packaging Type: Standard
- Pre Arc I2t: 6500
- Product Type: Square body US style, -FKE/115 type K indicator for micro
- Product Length: 5.433 IN
- Product Height: 2.087 IN
- Product Weight: 1.6456 LB
- Product Width: .315 IN
- Voltage Rating: 1000 Vac
- Watt Losses: 65W
Typical Applications
- DC Common Bus Systems
- DC Drive Protection
- Power Converters and Rectifiers
- Reduced Voltage Starters
- Industrial Power Distribution and Semiconductor Protection
Why Bussmann?
Bussmann fuses are built to exacting standards, and the 170M5738 is backed by CSA certification, IEC rating, and UL Recognized component status, plus CE marking and RoHS compliance. Its Class aR high speed design and defined pre-arc and clearing I2t characteristics give electrical professionals predictable, dependable circuit protection for critical DC power applications. Choose Bussmann for code-compliant performance you can trust in demanding industrial environments.
Manufacturer Resources
Product Specs
- Amperage Rating:
- 250A
- Class:
- Class aR
- Clearing I2t:
- Clearing at 1000V: 38500 , Clearing at 1250V: 51500
- Current Rating:
- 250A RMS
- Fuse Indicator:
- Non Indicating
- Interrupt Rating:
- 100 kAIC
- Packaging Type:
- Standard
- Pre Arc I2t:
- 6500
- Voltage Rating:
- 1000 Vac
- Watt Losses:
- 65W
- 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