General Purpose Fuses
JLS Class J Fuses
600 VAC • Fast Acting • 1 – 600 Amperes
Space Saving
• JLS fuse characteristics are similar to KLNR/KLSR fast acting Class
RK1 fuses, but dimensionally are much smaller.
Safety
General Purpose Fuses
• 200,000 A.I.R. — Reliable interruption of all overcurrents up to
200,000 amperes.
• Extremely current-limiting — Stops damaging short-circuit current
faster than any mechanical protective device.
• Fast acting — Provides fast acting protection to equipment such as
variable speed drives, rectifiers and other equipment containing surge
sensitive components.
Longer Equipment Life
• Current-limiting design reduces damage to equipment caused by
heating and magnetic effects of short-circuit currents.
Economical
• Extremely current-limiting design often permits use of readily
available, less costly equipment.
• Manufacturers of equipment containing dual voltage devices can
simplify manufacturing and reduce inventory by standardizing on 600
volt JLS fuses and Class J fuse blocks for all AC voltage ratings.
JLS series fuses provide space saving, fast acting overload and short-
circuit protection for non-inductive loads. When used for motors or other
inductive loads, the ampere rating of JLS series fuses must be increased
to prevent nuisance opening on in-rush currents. In such applications, JLS
fuses may provide only short-circuit protection. Consider using Littelfuse
POWR-PRO
®
JTD or JTD_ID series time-delay fuses in such circuits.
Easy to use
• 200,000 A.I.R. rating minimizes need for short-circuit calculations.
NOTE: Littelfuse JLS fuses are not time-delay fuses. For applications
where short-duration surges and spikes may cause nuisance fuse
opening, consider the use of Littelfuse POWR-PRO JTD or JTD_ID
series time-delay fuses.
Applications
General purpose circuits with little or no motor load.
Resistive loads, such as resistance electric heat.
Loads requiring fast acting overload protection, such as equipment
containing solid-state devices.
Specifications
Voltage Ratings:
Interrupting Ratings:
Ampere Range:
Approvals:
600 Volts AC
200,000 amperes rms symmetrical
1 – 600 amperes
Standard 248-8, Class J
UL Listed (File No: E81895)
CSA Certified (File No: LR29862)
QPL: Federal Specification No: WF-1814
Ampere Ratings
1
3
6
10
15
20
25
30
35
40
45
50
60
70
80
90
100
110
125
150
175
200
225
250
300
350
400
450
500
600
Example part number (series & amperage): JLS 110
Recommended Fuse Blocks
LPSJ series, LJ600 series
Refer to the Blocks and Holders section of this catalog for additional information.
© 2005 Littelfuse
•
POWR-GARD
™
Products Catalog
www.littelfuse.com
39
General Purpose Fuses
JLS Class J Fuses
600 VAC • Fast Acting • 1 — 600 Amperes
C
D
General Purpose Fuses
G
A
B
C
D
Fig. 2
F
E
H
A
Fig. 1
Amperes
1 – 30
35 – 60
70 – 100
110 – 200
225 – 400
450 – 600
Refer to
Fig. No.
1
1
2
2
2
2
14
Dimensions In Inches (mm in parentheses)
A
2 ⁄ (57.2)
2
3
⁄
8
(60.3)
2
5
⁄
8
(66.7)
3 (76.2)
3
3
⁄
8
(85.7)
3
3
⁄
4
(95.3)
B
—
—
3
17
⁄
32
(89.7)
pag 34
4
9
⁄
32
(108.7)
5
1
⁄
8
(130.2)
5
27
⁄
32
(148.4)
12
5 8
C
⁄ (12.7)
⁄ (15.9)
3
23
⁄
32
(94.5)
4
15
⁄
32
(113.5)
5
3
⁄
8
(136.5)
6
5
⁄
32
(156.4)
13 16
1 16
D
⁄ (20.6)
1 ⁄ (27.0)
4
5
⁄
8
(117.5)
5
3
⁄
4
(146.1)
7
1
⁄
8
(181.0)
8 (203.2)
E
—
—
1 (25.4)
1
1
⁄
2
(38.1)
2 (50.8)
2
1
⁄
2
(63.5)
F
—
—
3 4
⁄ (19.1)
1
1
⁄
8
(28.6)
1
5
⁄
8
(41.3)
2 (50.8)
G
—
—
9 32
⁄ (7.1)
9 32
⁄ (7.1)
13 32
⁄ (10.3)
17 32
⁄ (13.5)
H
—
—
18
⁄ (3.2)
3 16
⁄ (4.8)
14
⁄ (6.4)
3 8
⁄ (9.5)
100A
200A
400A
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
600A
30A
60A
1000000
800000
600000
400000
300000
200000
100000
80000
60000
40000
30000
20000
10000
8000
6000
4000
3000
2000
1000
800
600
400
300
200
100
100
200
300
400
600
800
1000
2000
3000
4000
6000
8000
10000
20000
30000
40000
60000
80000
100000
200000
600A
400A
200A
100A
60A
30A
5
8
10
20
30
40
60
80
100
200
300
400
600
800
1000
2000
3000
4000
6000
8000
10000
20000
30000
40000
60000
80000
100000
PEAK LET-THRU IN AMPERES
TIME IN SECONDS
CURRENT IN AMPERES
AVAILABLE FAULT CURRENT
SYMMETRICAL R. M. S. AMPERES
40
567002
www.littelfuse.com
© 2005 Littelfuse
•
POWR-GARD
™
Products Catalog
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