POWR-GARD® Technical Resource
FUSE CLASS AND SELECTION CHART
UL CLASS
LITTELFUSE
SERIES
OVERLOAD
CHARACTERISTICS
VOLTAGE
(VOLTS)
AC RATINGS
CURRENT
INTERRUPTING
(AMPERES)
(AMPERES)
VOLTAGE
(VOLTS)
DC RATINGS
CURRENT
(AMPERES)
INTERRUPTING
(AMPERES)
KLPC
Time-Delay
600
200 - 6000
200K / 300K*
480
200 - 6000
L
KLLU
Time-Delay
600
601 - 4000
200,000
300
601 - 4000
20,000
Fast-Acting
Time-Delay
Time-Delay
Time-Delay
Fast-Acting
600
250
600
600
250
150 - 2000
0.1 - 600
0.1 - 600
0.1 - 600
1 - 600
200,000
600
125
300
300
125
250
300
125
125
300
300
600
150 - 2000
0.1 - 600
0.1 - 600
0.1 - 600
1 - 600
1 - 30
35 - 600
35 - 600
0.1 - 600
0.1 - 600
0.1 - 600
0.1 - 600
50,000
RK1
LDC
LLNRK
LLSRK_ID
LLSRK
KLNR
200K / 300K*
300
500
0.8 - 100
110 - 600
20,000
200,000
–
–
–
160
125
1 - 60
70 - 1200
300
1 - 1200
0.2 - 2
4.5 - 10
2.25 - 4
12 - 30
0.1 - 30
0.1 - 30
35 - 60
KLSR
RK5
J
Fast-Acting
600
1 - 600
FLNR_ID
FLNR
FLSR_ID
FLSR
IDSR
Time-Delay
250
250
600
600
600
35 - 600
0.1 - 600
0.1 - 600
0.1 - 600
0.1 - 600
JTD_ID
Time-Delay
600
0.8 - 600
JTD
Time-Delay
600
0.8 - 600
JLS
Fast-Acting
600
1 - 600
300
1 - 1200
600
1 - 1200
600
0.2 - 30
JLLN
T
Fast-Acting
JLLS
CC
20,000
0.5 - 60
10,000
Solar
–
1000
1 - 30
SPFJ
Solar
600
125-450
200,000
1000
70 - 450
SPFI
SPXV
SPXI
Solar
Solar
Solar
–
–
–
–
–
–
–
–
–
1000
1500
1500
2 - 30
6 - 30
2.5 - 30
250
1 - 600
250
1 - 600
20,000
20K (70 - 200A)
10K (250 - 400A)
20K (450A)
20,000
30,000
30,000
20K (1 - 60A)
50K (70 - 600A)
600
500
400
600
500
150
100
250
200
450
–
650
1-7
8 - 30
35 - 60
70 - 200
225 - 600
1 - 60
70 - 1000
1 - 200
225 - 800
10 - 800
–
10 - 800
SPF
NLN
NLS
Fast-Acting
L15S
Telecom
LFR60
170
Time Lag
Plug
LFR25
100,000
SLC
L25S
L50S
L60S
L70S
Very Fast-Acting
600
1 - 600
150
1 - 1000
20,000
–
–
–
–
0.1 - 30
0.1 - 30
0.1 - 30
0.1 - 30
–
0.44
11
–
–
70 - 1200
1 - 600
–
10,000
10,000
50,000
50,000
–
10,000
20,000
–
–
–
BLS
Fast-Acting
FLA
FLM
FLQ
KLK
KLKD
KLQ
Time-Delay
Time-Delay
Time-Delay
Fast-Acting
Fast-Acting
Time-Delay
FLU
Fast-Acting
1000
SOO, TOO
SLO, TLO
L17T
TLN
Time-Delay
Medium Time-Delay
125
125
–
–
–
–
10,000
–
–
–
10,000
–
–
–
1000
–
–
170
1 - 125
L60030C • LFPSC •
LPSC • 571 • 572 •
LEC • LEY
LFC60060
LFG600 (1/2 - 20A)
LFG480 (25 - 60A)
LFPHV
LFJ1000
Not Required
LPXV
Not Required
LFH25
LSCR • 1LFS
–
125
300
500
600
–
Fast-Acting
LFT60 •
LSCR002 (700-800A)
20,000
10,000
Fast-Acting
LFT30 •
LSCR002 (700-800A)
LFH60
10,000
10,000
10,000
100K / 200K*
100,000
10,000
10,000
20,000
10,000
10,000
–
–
BLF
BLN
200,000
LFJ60 • LFPSJ
20K (1 - 60A)
50K (70 - 600A)
1 - 800
10 - 800
1 - 800
10 - 800
0.5 - 15
20 - 30
1 - 30
0.2 - 5
6 - 10
0.1 - 30
0.1 - 30
0.1 - 30
0.1 - 30
0.1 - 30
1-6
0.44/
11
0.25 - 30
15 - 30
–
–
TLS
50,000
20,000
250
500
600
700
250
125
250
600
250
125
250
500
600
600
600
Fast-Acting
200K / 300K*
LFR25
LFR60
LFR60
LFR25
20,000
200,000
200,000
200K / 300K*
G
Midget
(Supplementary)
200,000
–
LFR60
0.1 - 30
0.1 - 30
35 - 60
0.5 - 20
25 - 60
–
CD
High-Speed
200K / 300K*
20,000
600
600
600
600
480
–
Time-Delay
Time-Delay
Fast-Acting
Time-Delay
K5
200,000
20,000
250
250
300
500
300
300
250
CCMR
KLDR
KLKR
CCMR
Solar
200K / 300K*
RECOMMENDED
FUSE BLOCKS AND
FUSE HOLDERS
100,000
L60030M • LFPSM •
571 • 572 •
LEB • LEX
LFPHV
Box Cover Units
LTFD Series
LFR25
LTFD101 •
LFT30060 (cartridge)
* Littelfuse self-certified
®
© 2015 Littelfuse POWR-GARD® Products
Littelfuse.com
POWR-GARD® Technical Resource
CONDENSED CROSS REFERENCE GUIDE
This cross reference covers the most popular fuses for which there is a similar Littelfuse
standard item. Furnished for your convenience, it is meant to serve as a guide for product
selection. We suggest you check all applicable specifications before making substitutions.
For special applications, more complete information, and for fuse block and medium voltage
fuse cross referencing, visit Littelfuse.com or call 1-800-TEC-FUSE (1-800-832-3873).
Competitor
Littelfuse
Competitor
Littelfuse
Competitor
Littelfuse
Competitor
Littelfuse
10KOTN
10KOTS
50KOTN
50KOTS
A013F
A015F
A015R
A025F
A050F
A060F
A070F
A13X
A25X
A2D-R
A2K-R
A3T
A4BQ
A4BT
A4BY
A4J
A50P (type 1 & 4)
A60X
A6D-R
A6K-R
A6T
A70P
ABC
ACK
AG
AGA
AGC
AGU (1-30A)
AGW
AJT
AMG
AMI
ANL
ANN
ASO
ATC
AT-DE
ATDR
ATM (Mersen)
ATMR
ATQ
ATQR
AX
BAF
BAN
BBS
C519
C520
NLN
NLS
NLN
NLS
L15S
L15S
L15S
L25S
L50S
L60S
L70S
L15S
L25S †
LLNRK §
KLNR
JLLN
KLPC
KLLU or KLPC
KLPC or KLLU
JLS
L50S
L60S
LLSRK_ID §
KLSR
JLLS
L70S
314
CCK
SLC
AGA
312
BLN
AGW
JTD_ID
MEG
MID
CNL §
CNN_E
SPF
ATO (287)
FLNR_ID ‡
CCMR §
KLKD
KLKR §
FLQ
KLDR
481
BLF
BLN
BLS
229
225
CJ
CJS
CLF
CLL
CLU
CM
CRN-R
CRS-R
CTN-R
CTS-R
DCT
EBS
ECNR
ECSR
ERN
ERS
FNA
FNM
FNQ
FNQ-R
FRN-R
FRS-R
FWA
FWH
FWP
FWX
GDA
GDB
GDC
GDL
GEB
GEBN
GFA
GFN
GGC
GGM
GLR
GMA
GMD
GMT
HCLR
HCTR
HEB
HET
HLR
HP10M
HP6J
JDL
JFL
JHC
JJN
JJS
JLS
JLS
KLPC or KLLU
KLLU or KLPC
KLLU or KLPC
BLF
FLNR_ID ‡
FLSR_ID
KLNR
KLSR
SPF †
BLS
FLNR_ID ‡
FLSR_ID
FLNR +
FLSR +
FLA
FLM
FLQ
KLDR
FLNR_ID ‡
FLSR_ID
L15S † §
L50S † §
L70S * §
L25S * †
216
217
218
313
LEB
LET
251
FLA
312
235
LGR
235
239
481
KLKR
KLDR
LEB
LET
LHR
SPF
SPFJ *
JTD_ID
JLS
JTD_ID
JLLN
JLLS
JKS
KAA
KAB
KAC
KBH
KLM
KLU
KN
KON
KOS
KRP-C
KS
KTK
KTKR
KTNR
KTSR
KTU 601-2000A
KTU 2500-6000A
LCL
LCU
LENRK
LESRK
LKU
LONRK
LOSRK
LPCC
LPJ (SP)
LPNRK (SP)
LPSRK (SP)
MCL
MCR
MDA
MDL
MDQ
MDV
MDX
MEN
MEQ
MID
MOF
MOL
MTH
NCLR
NON
JLS
L15S
L25S
KLC
L50S
KLKD
KLLU or KLPC
KLNR
NLN
NLS
KLPC
KLSR
KLK
KLKR
KLNR
KLSR
LDC
KLPC
KLPC or KLLU
KLPC or KLLU
LLNRK
LLSRK_ID
KLLU
LLNRK
LLSRK_ID
CCMR
JTD_ID
LLNRK §
LLSRK_ID
KLK
251
326
313
313
315
313
FLM
FLQ
FLA
BLN
BLF
312
KLNR
NLN
NOS
NRN
NRN (15-60A)
NRS
OT
OTM
OTN
OTS
PV-(1-30)A10F
REN
RES
RF
RFA
RFC
RFL (750V)
RFN (Mersen)
RFS (Mersen)
RFV
RHN
RHS
S
SA
SC
SEC
SF13X
SF25X
SF50P
SF60X
SF70P
SFE
SL
T
TJN
TJS
TL
TR
TRM
TRN-R
TRS
TRS-R
XL25X
XL50F
XL70F
NLS
NLN
NLKP
NLS
NLN
BLF or BLN
NLN
NLS
SPF
FLNR +
FLSR +
FLNR +
L15S
KLC
L70S (700 V)
FLNR +
FLSR +
L50S
KLNR
KLSR
SOO
SAO
SLC
SLC
L15S
L25S
L50S
L60S
L70S
SFE
SLO
TOO
JLLN
JLLS
TLO
FLNR_ID ‡ / §
FLM
FLNR_ID ‡ / §
FLSR_ID §
FLSR_ID §
L25S
L50S *
L70S *
© 2015 Littelfuse POWR-GARD® Products
Littelfuse.com
A fuse may be used in circuits where the fuse’s voltage rating is equal to or greater than the
circuit voltage, unless otherwise stated on the fuse. For example, the FLSR_ID indicating fuse
has a voltage rating of 75-600 volts. This fuse can be used on 600 volts, 480 volts, 250 volts,
125 volts, or 75 volts. Never use a fuse in a circuit having a higher rated voltage than the fuse.
* Check specific mounting dimensions before substituting.
† Check characteristics and dimensions for application before substituting.
‡ For 1/10 - 30 amperes, order non-indicating FLNR series fuses.
§ Verify voltage for DC applications.
+ Littelfuse product is a non-renewable fuse.
Form: PF613
Rev: 1-A-041715