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UL Fuse Classification Chart

UL CLASS	FUSE OVERLOAD CHARACTERISTICS	INTERRUPTING RATING, AMPERES	AC VOLTAGE RATING	AVAILABLE AMPERE RATINGS	LITTELFUSE SERIES NUMBER	BUSSMAN SERIES NUMBER	EDISON SERIES NUMBER
L	TIME-DELAY	200,000	600*	200 - 6000 601 - 4000 200 - 2000	KLPC KLLU LDC	KRPC KLU n/a	n/a LCL n/a
RK1***	TIME-DELAY	200,000	250 600	¹/10 - 600	LLNRK LLSRK	LPNRK LPSRK	LENRK LLSRK
RK1***	FAST-ACTING	200,000	250 600	1 - 600	KLNR KLSR	KTNR KTSR	NCLR SCLR
RK5	TIME-DELAY	200,000	250	35 - 600	FLNR-ID	FRNR	ECNR
RK5	TIME-DELAY	200,000	250	¹/10 - 600	FLNR	FRNR	ECNR
RK5	TIME-DELAY	200,000	600	¹/10 - 600	FLSR & FLSR-ID IDSR	FRSR	ECSR
T	FAST-ACTING	200,000	300** 600	1 - 1200 1 - 1200	JLLN** JLLS	JJN JJS	TJN TJS
J	TIME-DELAY	200,000	600	⁸/10 - 600	JTD & JTD-ID	LPJ	JDL
J	FAST-ACTING	200,000	600	1 - 600	JLS	JKS	JFL
CC	TIME-DELAY	200,000	600	¹/10 - 30 ¹/5 - 30	KLDR CCMR (formerly KLMR)	FNQR LPCC	HCTR EDCC
CC	FAST-ACTING	200,000	600	¹/10-30	KLKR	KTKR	HCLR
CD	TIME-DELAY	200,000	600	35 - 60	CCMR	LPCC	EDCC
G	TIME-DELAY	100,000	480*	¹/2 - 60	SLC	SC	SEC
K5	FAST-ACTING	50,000	250 600	1 - 600	NLN NLS	NON NOS	KON KOS
H	RENEWABLE FUSES FAST-ACTING	10,000	250 600	1 - 600	RLN RLS	REN RES	ERN ERS
* LDC rated 600 volts AC/DC JLLN Class T is UL Listed at 300 volts * RK1 Class fuses are Ultra-Fast Clearing