UL Class Fuses | McMaster-Carr

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Fuse UL Class

RK1

RK5

System of Measurement

Current

Voltage

Manufacturer Equivalent Fuse

Fuse Protection Type

Fuse Type

Overall Length

For Fuse Manufacturer Equivalent

Fuse Current

Length

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

Cartridge Fuse Type

Overall Diameter

With Blown Fuse Indicator

Certification

UL Recognized Component

Diameter

Number of Elements

Rejection-Style End

Yes

For Number of Fuses

RoHS

Compliant

Compliant with Exemptions

Not Compliant

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

Export Control Classification Number (ECCN)

EAR99

REACH

Compliant

Not Compliant

DFARS Specialty Metals

UL File Number

652 Products

Fuses

UL Class RK5 Fuses

Withstand short overloads to stay closed during harmless temporary surges

131 products

UL Class CC Time-Delay Midget Fuses for Motors

Withstand the high inrush current caused by a motor starting

37 products

UL Class CC Time-Delay Midget Fuses for Transformers

Handle high inrush currents and the initial current cycle unique to transformers

44 products

UL Class J Time-Delay Fuses for Tight Spaces

Withstand short overloads to stay closed during harmless temporary surges

54 products

UL Class CC Fast-Acting Midget Fuses

Open circuits quickly when surges are detected

27 products

UL Class K5 Fuses

Best for circuits with no temporary overload current, such as in lighting and heating

38 products

UL Class T Fuses for Extra-Tight Spaces

Smaller than Class J fuses for extra-tight spaces such as meters and variable-speed drives

33 products

UL Class RK1 Time-Delay Fuses

Withstand short overloads to stay closed during harmless temporary surges

39 products

UL Class J Fast-Acting Fuses for Tight Spaces

Open circuits quickly when surges are detected

21 products

UL Class G Time-Delay Midget Fuses

Withstand short overloads to stay closed during harmless temporary surges

9 products

UL Class RK1 Fast-Acting Fuses

Open circuits quickly when surges are detected

19 products

UL Class L High-Current Fuses

Time-delay fuses for high-current power applications

4 products

UL Class H Replaceable-Element Fuses

Replace the current-carrying element rather than the entire fuse after the fuse breaks

36 products

Touch-Safe Fuses

Enclosed with recessed plug-in blades to prevent accidental contact with electrical circuits

21 products

UL Class G Fast-Acting Midget Fuses

Open circuits quickly when surges are detected

5 products

Other Products

Fuse Blocks

Send power to one or more circuits and house a fuse for each of them

119 products

Fuse Block Reducers

Adapt fuse blocks designed for large, high-amp fuses to hold small, low-amp fuses

8 products

Fuse Holders

Contain, protect, and mount fuses

6 products

Fuse Block Safety Covers

Prevent accidental shocks when handling fuse blocks and fuses

4 products