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- Fast-acting
- Current-limiting
- 200,000 AIR
- Compact size
- POWR-GARD® technology
- Provides protection for equipment requiring fast overload protection
- Reduces damage caused by heating and magnetic effects of short-circuit currents
- Reliable interruption of all overcurrents up to 200,000 A
- Useful when space is limited: 4 5/8" long, 1 1/8" diameter
- Designed for maximum protection from overcurrent
JLS Parts
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Showing 1 to 12 of 2393 Total Results
Part Number | Actions | Current Rating (Continuous) in Amps | Interrupting Rating | Opening | Maximum AC Voltage (V) | Size | Agency Approvals |
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Part Number | Actions | Current Rating (Continuous) in Amps | Interrupting Rating
| Opening | Maximum AC Voltage (V) | Size | Agency Approvals | |
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JLS Applications
- Power conversion devices
- Variable speed drives
- Rectifiers
- Resistive loads
- Solid-state devices
Series: JLS Resources

UL POWR Fuses Flyer

UL Class CF Fuses – UL Class J Fuses Cross Reference Guide
Littelfuse offers Class J Fuses that can be used as a substitute for Class CF fuses. Utilize this guide as a cross-reference.

How Do Fuses & Circuit Breakers Compare?
Download our white paper describing the benefits of using fuses for overcurrent protection.