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UL FUSE CLASSIFICATION CHART
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| UL CLASS |
FUSE OVERLOAD CHARACTERISTICS |
INTERRUPTING RATING, AMPERES |
AC VOLTAGE RATING |
AVAILABLE AMPERE RATINGS |
LITTELFUSE SERIES NUMBER |
| L |
TIME-DELAY |
200,000 |
600* |
200 - 6000
601 - 4000
200 - 2000 |
KLPC
KLLU
LDC |
| RK1*** |
TIME-DELAY |
200,000 |
250
600 |
1/10 - 600 |
LLNRK
LLSRK |
| FAST-ACTING |
200,000 |
250
600 |
1 - 600 |
KLNR
KLSR |
| RK5 |
TIME-DELAY |
200,000 |
250
600 |
1/10 - 600 |
FLNR & FLNR-ID
FLSR & FLSR-ID
IDSR |
| T |
FAST-ACTING |
200,000 |
300**
600 |
1 - 1200
1 - 1200 |
JLLN
JLLS |
| J |
TIME-DELAY |
200,000 |
600 |
1 - 600 |
JTD & JTD-ID |
| FAST-ACTING |
200,000 |
600 |
1 - 600 |
JLS |
| CC |
TIME-DELAY |
200,000 |
600 |
1/10 - 30
1/4 - 30 |
KLDR
CCMR (formerly KLMR) |
| FAST-ACTING |
200,000 |
600 |
1/10 |
KLKR |
| CD |
TIME-DELAY |
200,000 |
600 |
35 - 60 |
CCMR |
| G |
TIME-DELAY |
100,000 |
480* |
1/2 - 60 |
SLC |
| K5 |
FAST-ACTING |
50,000 |
250
600 |
1 - 600 |
NLN
NLS |
| H |
RENEWABLE FUSES FAST-ACTING |
10,000 |
250
600 |
1 - 600 |
RLN
RLS |
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* LDC rated 600 volts AC/DC
** JLLN Class T is UL Listed at 300 volts
*** RK1 Class fuses are Ultra-Fast Clearing
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