UL Class Fuses

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Fuse UL Class

RK1

RK5

System of Measurement

Current

Voltage

Manufacturer Equivalent Fuse

Fuse Protection Type

Fuse Type

For Fuse Manufacturer Equivalent

Fuse Current

Breakthrough Current @ Voltage

10,000 amp @ 250V AC

50,000 amp @ 250V AC

200,000 amp @ 250V AC

300,000 amp @ 250V AC

200,000 amp @ 300V AC

100,000 amp @ 480V AC

10,000 amp @ 500V AC

10,000 amp @ 600V AC

50,000 amp @ 600V AC

100,000 amp @ 600V AC

200,000 amp @ 600V AC

300,000 amp @ 600V AC

20,000 amp @ 125V DC

50,000 amp @ 125V DC

100,000 amp @ 125V DC

Overall Diameter

Cartridge Fuse Type

With Blown Fuse Indicator

Yes

Number of Elements

Certification

CE Marked

CSA Certified

UL Listed

UL Recognized Component

Rejection-Style End

Yes

RoHS

Compliant

Compliant with Exemptions

Not Compliant

For Number of Fuses

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

REACH

Mounting Location

UL File Number

CSA File Number

653 Products

About Fuses

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UL Class CC Time-Delay Midget Fuses for Motors

These fuses can withstand the high inrush current caused by a motor starting.

UL Class CC Time-Delay
Midget Fuses for Transformers

Designed to handle high inrush currents and the initial current cycle unique to transformers, these fuses provide comparable performance with a smaller footprint than standard size fuses.

UL Class CC Fast-Acting Midget Fuses

These fuses open circuits quickly when surges are detected.

UL Class RK5 Fuses

Also known as dual-element fuses, these time-delay fuses withstand current overload for a short time so they won't open when exposed to harmless temporary surges, such as when starting a motor.

UL Class J Time-Delay Fuses for Tight Spaces

Also known as dual-element fuses, these fuses withstand current overload for a short time so they won't open when exposed to harmless temporary surges, such as when starting a motor.

UL Class J Fast-Acting Fuses for Tight Spaces

These fuses open circuits quickly when surges are detected.

UL Class RK1 Time-Delay Fuses

Also known as dual-element fuses, these fuses withstand current overload for a short time so they won't open when exposed to harmless temporary surges, such as when starting a motor.

UL Class RK1 Fast-Acting Fuses

These fuses open circuits quickly when surges are detected.

UL Class K5 Fuses

Use these fast-acting fuses in applications where temporary overload current is not present, such as in lighting and heating.

UL Class T Fuses for Extra-Tight Spaces

Smaller than UL Class J fuses, these fast-acting fuses can be used in extra-tight spaces such as meters, uninterruptible power supplies, and variable-speed drives.

UL Class G Time-Delay Midget Fuses

Able to withstand current overload for a short time, these fuses will not open when exposed to harmless temporary surges, such as when starting a motor.