UL Fuse Class Chart - Types of Fuses and Fuse Size

UL Fuse Class Chart - Types of Fuses and Fuse Size

Need help choosing a fuse from the many sizes and types of fuses? Use these fuse charts to find the best fuse type given your required fuse overload characteristics, interrupting rating amps, AC voltage rating, and available amps fuse rating. Select a UL fuse class to see fuse characteristics and vendor information for that UL class of fuses.

UL Class L Fuse Chart ↓

UL Class RK1 Fuse Chart ↓

UL Class RK5 Fuse Chart ↓

UL Class T Fuse Chart ↓

UL Class J Fuse Chart ↓

UL Class CC Fuse Chart ↓

UL Class CD Fuse Chart ↓

UL Class G Fuse Chart ↓

UL Class K5 Fuse Chart ↓

UL Class H Fuse Chart ↓

UL Class L Fuse Chart

Fuse Overload
Characteristics		 Time Delay
Interrupting
Rating Amps		 200,000
AC Voltage
Rating		 600*
Available
Amp Rating		 200 ‑ 6000 601 ‑ 4000
Littelfuse KLPC KLLU
Bussman KRPC KLU
Edison n/a LCL
Fuse Overload
Characteristics		 Time Delay
Interrupting
Rating Amps		 200,000
AC Voltage
Rating		 600*
Available
Amp Rating		 200 ‑ 2000
Littelfuse LDC
Bussman n/a
Edison n/a

* LDC rated 600 volts AC/DC

UL Class RK1 Fuse Chart***

Fuse Overload
Characteristics:		 Time Delay
Interrupting
Rating Amps:		 200,000
AC Voltage
Rating:		 250 600
Available
Amp Rating		 1/10 ‑ 600 1/10 ‑ 600
Littelfuse LLNRK LLSRK
Bussman LPNRK LPSRK
Edison LENRK LLSRK
Fuse Overload
Characteristics:		 Fast Acting
Interrupting
Rating Amps:		 200,000
AC Voltage
Rating:		 250 600
Available
Amp Rating		 1 ‑ 600 1 ‑ 600
Littelfuse KLNR KLSR
Bussman KTNR KTSR
Edison NCLR SCLR

*** RK1 Class fuses are Ultra Fast Clearing

UL Class RK5 Fuse Chart

Fuse Overload
Characteristics		 Time Delay
Interrupting
Rating Amps		 200,000
AC Voltage
Rating		 250
Available
Amp Rating		 35 ‑ 600 1/10 ‑ 600
Littelfuse FLNR‑ID FLNR
Bussman FRNR FRNR
Edison ECNR ECNR
Fuse Overload
Characteristics		 Time Delay
Interrupting
Rating Amps		 200,000
AC Voltage
Rating		 600
Available
Amp Rating		 1/10 ‑ 600
Littelfuse FLSR & FLSR‑ID, IDSR
Bussman FRSR
Edison ECSR

UL Class T Fuse Chart

Fuse Overload
Characteristics		 Fast Acting
Interrupting
Rating Amps		 200,000
AC Voltage
Rating:		 300** 600
Available
Amp Rating		 1 ‑ 1200 1 ‑ 1200
Littelfuse JLLN** JLLS
Bussman JJN JJS
Edison TJN TJS

** JLLN Class T Fuse is UL Listed at 300 volts

UL Class J Fuse Chart

Fuse Overload
Characteristics		 Time Delay
Interrupting
Rating Amps		 200,000
AC Voltage
Rating		 600
Available
Amp Rating		 8/10 ‑ 600
Littelfuse JTD & JTD‑ID
Bussman LPJ
Edison JDL
Fuse Overload
Characteristics		 Fast Acting
Interrupting
Rating Amps		 200,000
AC Voltage
Rating		 600
Available
Amp Rating		 1 ‑ 600
Littelfuse JLS
Bussman JKS
Edison JFL

UL Class CC Fuse Chart

Fuse Overload
Characteristics		 Time Delay
Interrupting
Rating Amps		 200,000
AC Voltage
Rating		 600
Available
Amp Rating		 1/10 ‑ 30 2/10 ‑ 30
Littelfuse KLDR CCMR (formerly KLMR)
Bussman FNQR LPCC
Edison HCTR EDCC
Fuse Overload
Characteristics		 Fast Acting
Interrupting
Rating Amps		 200,000
AC Voltage
Rating		 600
Available
Amp Rating		 1/10 ‑ 30
Littelfuse KLKR
Bussman KTKR
Edison HCLR

UL Class CD Fuse Chart

Fuse Overload
Characteristics		 Time Delay
Interrupting
Rating Amps:		 200,000
AC Voltage
Rating		 600
Available
Amp Rating		 35 ‑ 60
Littelfuse CCMR
Bussman LPCC
Edison EDCC

UL Class G Fuse Chart

Fuse Overload
Characteristics		 Time Delay
Interrupting
Rating Amps		 100,000
AC Voltage
Rating		 480*
Available
Amp Rating		 1/2 ‑ 60
Littelfuse SLC
Bussman SC
Edison SEC

* LDC rated 600 volts AC/DC

UL Class K5 Fuse Chart

Fuse Overload
Characteristics		 Fast Acting
Interrupting
Rating Amps		 50,000
AC Voltage
Rating		 250 600
Available
Amp Rating		 1 ‑ 600 1 ‑ 600
Littelfuse NLN NLS
Bussman NON NOS
Edison KON KOS

UL Class H Fuse Chart

Fuse Overload
Characteristics		 Renewable Fuses
Fast Action
Interrupting
Rating Amps		 10,000
AC Voltage
Rating		 250 600
Available
Amp Rating		 1 ‑ 600 1 ‑ 600
Littelfuse RLN RLS
Bussman REN RES
Edison ERN ERS
See Our Related Pages:

Warning: When using this information to perform electrical work, call a licensed electrician and consult the NEC® for safety. All licensed electricians have passed examinations covering the National Electric Code®, know state and local building codes, and may carry insurance to cover damages.