UL Fuse Classification Chart
Use this chart to find a time delay fuse or fast acting fuse based on UL fuse classification for Littlefuse, Bussman and Edison.
|
UL Class: L |
UL Class: RK1*** |
UL Class: RK5 |
UL Class: T |
| Fuse Overload Characteristics |
Time Delay |
Time Delay |
Fast Acting |
Time Delay |
Fast Acting |
| Interrupting Rating, Ampere |
200,000 |
200,000 |
200,000 |
200,000 |
200,000 |
| AC Voltage Rating |
600* |
250 |
600 |
250 |
600 |
250 |
600 |
300** |
600 |
| Available Ampere Rating |
200 ‑ 6000 |
601 ‑ 4000 |
200 ‑ 2000 |
1/10 ‑ 600 |
1/10 ‑ 600 |
1 ‑ 600 |
1 ‑ 600 |
35 ‑ 600 |
1/10 ‑ 600 |
1/10 ‑ 600 |
1 ‑ 1200 |
1 ‑ 1200 |
| Littlefuse |
KLPC
|
KLLU
|
LDC
|
LLNRK
|
LLSRK
|
KLNR
|
KLSR
|
FLNR‑ID
|
FLNR
|
FLSR & FLSR‑ID,
IDSR
|
JLLN**
|
JLLS
|
| Bussman |
KRPC
|
KLU
|
n/a |
LPNRK
|
LPSRK
|
KTNR
|
KTSR
|
FRNR
|
FRNR
|
FRSR
|
JJN
|
JJS
|
| Edison |
n/a |
LCL |
n/a |
LENRK |
LLSRK |
NCLR |
SCLR |
ECNR |
ECNR |
ECSR |
TJN |
TJS |
|
UL Class: J |
UL Class: CC |
UL Class: CD |
UL Class: G |
UL Class: K5 |
UL Class: H |
| Fuse Overload Characteristics |
Time Delay |
Fast Acting |
Time Delay |
Fast Acting |
Time Delay |
Time Delay |
Fast Acting |
Renewable Fuses Fast Acting |
| Interrupting Rating, Amps |
200,000 |
200,000 |
200,000 |
200,000 |
200,000 |
100,000 |
50,000 |
10,000 |
| AC Voltage Rating |
600 |
600 |
600 |
600 |
600 |
480* |
250 |
600 |
250 |
600 |
| Available Amp Rating |
8/10 ‑ 600 |
1 ‑ 600 |
1/10 ‑ 30 |
1/5 ‑ 30 |
1/10 ‑ 30 |
35 ‑ 60 |
1/2 ‑ 60 |
1 ‑ 600 |
1 ‑ 600 |
1 ‑ 600 |
1 ‑ 600 |
| Littlefuse |
JTD & JTD‑ID
|
JLS
|
KLDR
|
CCMR (formerly KLMR)
|
KLKR
|
CCMR
|
SLC
|
NLN
|
NLS
|
RLN
|
RLS
|
| Bussman |
LPJ
|
JKS
|
FNQR
|
LPCC
|
KTKR
|
LPCC
|
SC
|
NON
|
NOS
|
REN
|
RES
|
| Edison |
JDL |
JFL |
HCTR |
EDCC |
HCLR |
EDCC |
SEC |
KON |
KOS |
ERN |
ERS |
* LDC rated 600 volts AC/DC
** JLLN Class T is UL Listed at 300 volts
*** RK1 Class fuses are Ultra-Fast Clearing
Warning: When using this information to perform electrical work, call a licensed electrician or 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.