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Midget Fuses
Supplementary Overcurrent Protection
KLK Fuses
FAST-ACTING s 600 VAC
Fast-acting, high-interrupting capacity,
current-limiting type fuse. Especially suited
for control circuits, street lighting, H.I.D.
lighting, computers, and other applications
without high inrush currents.
Voltage Rating: 600 Volts AC
500 Volts DC
Interrupting Rating: UL Listed 100,000
amperes rms symmetrical
(Capable of 200,000 amperes)
Ampere Ratings:
1
10
1
4
18 112 5
2
10
2
6
14 212 7
3
10
3
8
12 312 9
34
10
12
15
20
25
30
Approvals: Standard 248-14
UL Listed 3/10-30A
(File No: E10480)
CSA Certified 3/10-30A
(File No: LR29862)
Versions available to meet
MIL-F-5160/60, QPL F60C:
Contact Factory.
Dimensions: 13/32" x 1-1/2"
Example part number (series & amperage): KLK 1-1/2
KLKD Fuses
FAST-ACTING s 600 VAC/DC
Fast-acting, high-interrupting capacity,
current-limiting type fuse. Especially suited
for DC control circuits, street lighting, H.I.D.
lighting, computers, and other applications.
Voltage Rating: 600 Volts AC/DC
Interrupting Rating: AC: 100,000 amperes
rms symmetrical; DC: 10,000 amperes
Ampere Ratings:
1
10
1
4
10
18 112 5 12
2
10
2
6
15
14 212 7 20
3
10
3
8
25
12 312 9 30
34
Approvals: Standard 248-14
UL Listed 3/10-30A
(File No: E10480)
CSA Certified 3/10-30A
(File No: LR29862)
Dimensions: 13/32" x 1-1/2"
Example part number (series & amperage): KLKD 30
FLM Fuses
TIME-DELAY s 250 VAC
Use FLM 250 volt time-delay fuses to
protect control circuit transformers,
solenoids, and other circuits with high
inrush currents. Excellent for supplemental
protection of small motors. For motor
branch-circuit protection, See Class
CC fuses.
Voltage Rating: 250 Volts AC
Interrupting Rating: AC: 10,000 amperes
rms symmetrical.
Ampere Ratings:
1
10
118 3
7
15
100
114
3210 8
2
10
1410 312
9
14 112 4 10
3
10
1610 412
12
4
10
1810 5
15
12 2 5610 20
6
10
214 6
25
8
10
212 614 30
1 2810
Approvals: Standard 248-14
UL Listed (File No: E10480)
CSA Certified
(File No: LR29862)
Dimensions: 13/32" x 1-1/2"
Example part number (series & amperage): FLM 15
FLQ Fuses
TIME-DELAY s 500 VAC
These 500 volt time-delay fuses provide
excellent supplemental protection of control
power transformers, solenoids, and circuits
with high inrush currents. UL and CSA 500
volt ratings permit use on 480 volt circuits.
FLQ fuses also provide supplemental
protection to small motors. For motor
branch-circuit protection, see Class
CC fuses.
Voltage Rating: 500 Volts AC
Interrupting Rating: 10,000 amperes
rms symmetrical
Ampere Ratings:
⁄ ⁄1 8
10 10
18 1
15
100
118
3
16
114
2
10
112
14 1610
3
10
2
4
10
214
12 212
6
10
3
3210
312
4
412
5
5610
6
614
7
8
9
10
12
14
15
20
25
30
Approvals: Standard 248-14
UL Listed (File No: E10480)
CSA Certified
(File No: LR29862)
Dimensions: 13/32" x 1-1/2"
Example part number (series & amperage): FLQ 1/2
RECOMMENDED FUSE BLOCKS
L60030M series. Refer to Fuse Block section of this catalog for additional information.
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Midget Fuses
Supplementary Overcurrent Protection
BLN Fuses
FAST-ACTING s 250 VAC
Fiber tube, 250 volt BLN fuses provide low-
cost protection for military applications and
control circuits.
Voltage Rating: 250 Volts AC
Interrupting Rating: 10,000 amperes rms
symmetrical
Ampere Ratings:
15
26
38
4
10
12
15
20
25
30
Approvals: Standard 248-14
UL Listed (File No: E10480)
CSA Certified
(File No: LR29862)
Versions available to meet
MIL-F-15160/9, QPL F09A:
Contact Factory
Dimensions: 13/32" x 1-1/2"
Example part number (series & amperage): BLN 30
BLF Fuses
FAST-ACTING s 125/250 VAC
Laminated tube BLF fuses are the lowest
price midget fuse. They are suitable for
control circuit and instrument protection in
dry locations.
Voltage Ratings: 250 Volts AC: 1/2 – 15
amperes; 125 Volts AC: 20 – 30 amperes
Interrupting Rating: 10,000 amperes rms
symmetrical
Ampere Ratings:
12 3 7 15
1 4 8 20
112 5 9 25
2 6 10 30
212 614 12
Approvals: Standard 248-14
UL Listed (File No: E10480)
CSA Certified
(File No: LR29862)
Dimensions: 13/32" x 1-1/2"
Example part number (series & amperage): BLF 5
BLS Fuses
FAST-ACTING s 250/600 VAC
BLS fuses are 1-3/8" long in contrast to
other midget fuses which are 1-1/2". They
provide space-saving, low-cost, protection
to street lighting, metering, control and
electronic circuits.
Voltage Rating: 600 Volts AC: 2/10 – 5
amperes; 250 Volts AC: 6 – 10 amperes
Interrupting Rating: 10,000 amperes
rms symmetrical
Ampere Ratings:
2
10
1
4
10
112
12 1610
34 1810
8
10
2
3
4
5
6
7
8
10
Approvals: Standard 248-14
UL Listed 1/2-5 Amps
(File No: E10480)
CSA Certified 1/2 – 5 Amps
(File No: LR29862)
Dimensions: 13/32" x 1-3/8"
Example part number (series & amperage): BLS 10
FLA Fuses
TIME-DELAY s 125 VAC
FLA fuses are 125 volt, pin-indicating time-
delay fuses for protection of control circuit
transformers, solenoids, and other circuits
with high inrush currents. Metal indicating pin
“pops-out” when fuse opens. Pin gives visual
indication of open fuse. Use FLA fuses in
conjunction with special fuseblocks to operate
mechanical signal switches or energize alarm
circuits. Fuses rated 12 amperes and above
have dual-tube construction.
Voltage Rating: 125 Volts AC
Interrupting Rating: 10,000 amperes rms
symmetrical
Ampere Ratings:
1
10
118 2810 614
15
100
114
3
7
2
10
1410 3210 8
14 112 312 10
3
10
1610 4
12 *
*4
10
1810 412
15
12 2 5 20 *
*6
10
214 5610 25
8
10
212 6
30 *
1
Approvals: Standard 248-14
UL Listed (File No: E10480)
CSA Certification Pending
Dimensions: 13/32" x 1-1/2"
* Note: Dual tube construction
Example part number (series & amperage): FLA 15
RECOMMENDED FUSE BLOCKS
L60030M series. Refer to Fuse Block section of this catalog for additional information.
50

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Midget Fuses
Supplementary Overcurrent Protection
NEW
KLQ Series Fuses
The Littelfuse KLQ series is designed to protect gaseous
vapor fixtures, HID ballasts, and other electronic and lighting
circuits. The KLQ is the same physical size as the Littelfuse
BLS, but has more time delay to handle transient and inrush
currents.
SPECIFICATIONS
Voltage Rating: 600VAC
Interrupting Rating: 10,000 amperes
Ampere Range: 1 – 6 amperes
Approvals: Standard 248-14 UL Listed (File No: E10480)
Dimensions: 13/32" x 1-3/8"
AMPERE RATINGS
12
1-6/10 3
4
5
6
RECOMMENDED FUSE BLOCKS
L60030M Series. Refer to Fuse Block section of this catalog
for additional information.
ORDERING INFORMATION
Example catalog number: KLQ005
Example system number: 0KLQ005.T
CROSS REFERENCE
Littelfuse
KLQ
Buss
KTQ
Ferraz-Shawmut
NEW
FLU Series Fuses
The Littelfuse FLU series is designed specifically for the
protection of multimeters. The 1000 VAC/VDC rating also
makes the FLU ideal for a variety of other applications.
SPECIFICATIONS
Voltage Rating: 1000 VAC/VDC
Interrupting Rating: 44/100A: 10kA
11A: 20kA
Ampere Range: 44/100 and 11 amperes
Approvals: UL Recognized under the components program.
(File No: E10480)
CSA Certified (File No: LR29862)
Dimensions: 44/100A: 13/32" x 1-3/8"
11A: 13/32" x 1-1/2"
ORDERING INFORMATION
Example catalog number: FLU011
Example system number: 0FLU011.T
CROSS REFERENCE
Littelfuse
FLU
Buss
DMM
Ferraz-Shawmut
51

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Midget Fuses
Supplementary Overcurrent Protection
KLK
1000
800
600
400
300
200
100
80
60
40
30
20
10
8
6
4
3
2
1
.8
.6
.4
.3
.2
.1
.08
.06
.04
.03
.02
.01
CURRENT IN AMPERES
FLM
1000
800
600
400
300
200
100
80
60
40
30
20
10
8
6
4
3
2
1
.8
.6
.4
.3
.2
.1
.08
.06
.04
.03
.02
.01
CURRENT IN AMPERES
52
KLKD
1000
800
600
400
300
200
100
80
60
40
30
20
10
8
6
4
3
2
1
.8
.6
.4
.3
.2
.1
.08
.06
.04
.03
.02
.01
FLQ
1000
800
600
400
300
200
100
80
60
40
30
20
10
8
6
4
3
2
1
.8
.6
.4
.3
.2
.1
.08
.06
.04
.03
.02
.01
CURRENT IN AMPERES
CURRENT IN AMPERES