Bussmann
®
R-Rated Fuses
For Motor Circuit Protection
Medium Voltage
JCK, JCK-A, JCK-B, JCH,
JCL, JCL-A, JCL-B,
JCG, JCR-A, & JCR-B
• R-Rated medium voltage fuses are back-up current limiting
fuses used in conjunction with medium voltage motors and
motor controllers.
• The JCK-A, JCL-A, & JCR-A are supplied with Cutler-
Hammer Ampgard Hookeye.
• This single hookeye is on one end of the fuse and aids in the
insertion and removal of the fuse.
• Current limiting fuses may be designated as R-Rated if they
meet the following requirements:
1. The fuse will safely interrupt all currents between its
minimum and maximum interrupting ratings.
2. The fuse will melt in a range of 15 to 35 seconds at a
value of 100 times the “R’ number (ANSI C37.46).
• Bussmann R-Rated current limiting fuses are designed for
use with medium voltage starters to provide short-circuit
protection for the motor and motor controller.
• These fuses offer a high level of fault current interruption in a
self-contained, non-venting package which can be mounted
indoors or in an enclosure.
• Open fuse indication on all fuses.
Catalog Symbol:
JCK, JCK-A, JCK-B, JCH, JCL, JCL-A,
JCL-B, JCG, JCR-A, & JCR-B
R-Rated
Medium Voltage
Current Limiting
2400V AC — JCK, JCK-A, JCK-B, JCH
4800V AC — JCL, JCL-A, JCL-B, JCG
7200V AC — JCR-A, JCR-B
Max. Design Voltage
2540V AC — JCK, JCK-A,
JCK-B, JCH
5080V AC — JCL, JCL-A
JCL-B, JCG
8300V AC — JCR-A, JCR-B
UL Recognized:
2540V AC — JCK, JCK-A
5080V AC — JCL, JCL-A
(2R-24R)
UL Recognized (GUIDE #MSSS2, FILE # E96676)
2-26-03
SB03044
Form No. JCK, JCK-A, JCK-B, JCH, JCL,
JCL-A, JCL-B, JCG, JCR-A, & JCR-B
Page 1 of 8
Data Sheet: 6001
Bussmann
®
R-Rated Fuses
For Motor Circuit Protection
Medium Voltage
Specifications
Buss
Catalog No.
JCK-2R
JCK-3R
JCK-4R
JCK-5R
JCK-6R
JCK-9R
JCK-12R
JCK-18R
JCK-24R
JCK-A-2R
JCK-A-3R
JCK-A-4R
JCK-A-5R
JCK-A-6R
JCK-A-9R
JCK-A-12R
JCK-A-18R
JCK-A-24R
JCK-B-30
JCK-B-2R
JCK-B-3R
JCK-B-4R
JCK-B-5R
JCK-B-6R
JCK-B-9R
JCK-B-12R
JCK-B-18R
JCK-B-24R
JCH-30
JCH-2R
JCH-3R
JCH-4R
JCH-5R
JCH-6R
JCH-9R
JCH-12R
JCH-18R
JCH-24R
JCL-2R
JCL-3R
JCL-4R
JCL-5R
JCL-6R
JCL-9R
JCL-12R
JCL-18R
JCL-24R
Amperage
70 2R
100 3R
130 4R
150 5R
170 6R
200 9R
230 12R
390 18R
450 24R
70 2R
100 3R
130 4R
150 5R
170 6R
200 9R
230 12R
390 18R
450 24R
25
70 2R
100 3R
130 4R
150 5R
170 6R
200 9R
230 12R
390 18R
450 24R
25
70 2R
100 3R
130 4R
150 5R
170 6R
200 9R
230 12R
390 18R
450 24R
70 2R
100 3R
130 4R
150 5R
170 6R
200 9R
230 12R
390 18R
450 24R
Maximum
Design Voltage
2540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
27540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
2540V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
A
Dimensions (Inches)
B
C
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
12.81
12.81
12.81
12.81
12.81
12.81
12.81
12.81
12.81
12.81
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
-
-
-
-
-
-
-
-
3.56
3.56
4.12
4.12
4.12
4.12
4.12
4.12
4.12
4.12
7.68
7.68
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
JCK, JCK-A, JCK-B, JCH,
JCL, JCL-A, JCL-B,
JCG, JCR-A, & JCR-B
Construction
Single
Single
Single
Single
Single
Single
Single
Double
Double
Single
Single
Single
Single
Single
Single
Single
Double
Double
Single
Single
Single
Single
Single
Single
Single
Single
Double
Double
Single
Single
Single
Single
Single
Single
Single
Single
Double
Double
Single
Single
Single
Single
Single
Single
Single
Double
Double
Max. Int. Cap.
Amps (Asym.)
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
Amps (Sym.)
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
Min. Int. Cap.
Amps (Sym.)
165
220
320
410
480
720
970
1,430
1,880
165
220
320
410
480
720
970
1,430
1,880
100
180
270
360
450
540
740
1,080
1,500
2,200
100
180
270
360
450
540
740
1,080
1,500
2,200
165
220
320
410
480
720
970
1,430
1,880
2400V; R-Rated; Indoor/Enclosure (See Figure 1)
11.24
11.24
11.24
11.24
11.24
11.24
11.24
11.24
11.24
11.24
11.24
11.24
11.24
11.24
11.24
11.24
11.24
11.24
14.18
14.18
14.18
14.18
14.18
14.18
14.18
14.18
14.18
14.18
11.56
11.56
11.56
11.56
11.56
11.56
11.56
11.56
11.56
11.56
15.76
15.76
15.76
15.76
15.76
15.76
15.76
15.76
15.76
2400V; R-Rated; Indoor/Enclosure; With Cutler-Hammer Ampgard Hookeye (See Figure 1)
2400V; R-Rated; Indoor/Enclosure; Bolt-On (See Figure 2)
2400V; R-Rated; Indoor; Hermetically Sealed, Class 1, Group D, Div. 2, Hazardous Locations; For Use with Ampgard Motor Starters (See Figure 1)
4800V; R-Rated; Indoor/Enclosure (See Figure 1)
2-26-03
SB03044
Form No. JCK, JCK-A, JCK-B, JCH, JCL,
JCL-A, JCL-B, JCG, JCR-A, & JCR-B
Page 2 of 8
Data Sheet: 6001
Bussmann
®
R-Rated Fuses
For Motor Circuit Protection
Medium Voltage
Specifications
Buss
Catalog No.
JCL-A-2R
JCL-A-3R
JCL-A-4R
JCL-A-5R
JCL-A-6R
JCL-A-9R
JCL-A-12R
JCL-A-18R
JCL-A-24R
JCL-A-36R
JCL-B-30
JCL-B-2R
JCL-B-3R
JCL-B-4R
JCL-B-5R
JCL-B-6R
JCL-B-9R
JCL-B-12R
JCL-B-18R
JCL-B-24R
JCG-30
JCG-2R
JCG-3R
JCG-4R
JCG-5R
JCG-6R
JCG-9R
JCG-12R
JCG-18R
JCG-24R
JCR-A-2R
JCR-A-3R
JCR-A-4R
JCR-A-5R
JCR-A-6R
JCR-A-9R
JCR-A-12R
JCR-A-18R
JCR-A-24R
JCR-B-2R
JCR-B-3R
JCR-B-4R
JCR-B-5R
JCR-B-6R
JCR-B-9R
JCR-B-12R
JCR-B-18R
JCR-B-24R
Amperage
70 2R
100 3R
130 4R
150 5R
170 6R
200 9R
230 12R
390 18R
450 24R
650 36R
30
70 2R
100 3R
130 4R
150 5R
170 6R
200 9R
230 12R
390 18R
450 24R
30
70 2R
100 3R
130 4R
150 5R
170 6R
200 9R
230 12R
390 18R
450 24R
70 2R
100 3R
130 4R
150 5R
170 6R
200 9R
230 12R
390 18R
450 24R
70 2R
100 3R
130 4R
150 5R
170 6R
200 9R
230 12R
390 18R
450 24R
Maximum
Design Voltage
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
5080V
8300V
8300V
8300V
8300V
8300V
7200V
7200V
7200V
7200V
8300V
8300V
8300V
8300V
8300V
7200V
7200V
7200V
7200V
A
Dimensions (Inches)
B
C
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
4.0
17.88
17.88
17.88
17.88
17.88
17.88
17.88
17.88
17.88
17.88
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
17.88
17.88
17.88
17.88
17.88
17.88
17.88
17.88
17.88
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
-
-
-
-
-
-
-
-
-
JCK, JCK-A, JCK-B, JCH,
JCL, JCL-A, JCL-B,
JCG, JCR-A, & JCR-B
Construction
Single
Single
Single
Single
Single
Single
Single
Double
Double
Double
Single
Single
Single
Single
Single
Single
Single
Single
Double
Double
Single
Single
Single
Single
Single
Single
Single
Single
Double
Double
Single
Single
Single
Single
Single
Single
Single
Double
Double
Single
Single
Single
Single
Single
Single
Single
Double
Double
Max. Int. Cap.
Amps (Asym.)
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
100,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
Amps (Sym.)
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
63,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
50,000
Min. Int. Cap.
Amps (Sym.)
165
220
320
410
480
720
970
1,430
1,880
3,200
100
180
270
360
450
540
740
1,080
1,500
2,200
95
180
270
350
450
540
700
1,000
1,450
2,000
200
320
405
550
670
1,300
1,500
2,000
2,600
200
320
405
550
670
1,300
1,500
2,000
2,600
4800V; R-Rated; Indoor/Enclosure; With Cutler-Hammer Ampgard Hookeye (See Figure 1)
15.76
15.76
15.76
15.76
15.76
15.76
15.76
15.76
15.76
16.0
19.25
19.25
19.25
19.25
19.25
19.25
19.25
19.25
19.25
19.25
16.6
16.6
16.6
16.6
16.6
16.6
16.6
16.6
15.85
15.85
15.85
15.85
15.85
15.85
15.85
15.85
15.85
15.85
15.85
19.25
19.25
19.25
19.25
19.25
19.25
19.25
19.25
19.25
4800V; R-Rated; Indoor/Enclosure; Bolt-On (See Figure 2)
3.31
3.31
4.12
4.12
4.12
4.12
4.12
4.12
4.12
4.12
6.31
6.31
4.12
4.12
4.12
4.12
4.12
4.12
4.12
7.43
7.43
-
-
-
-
-
-
-
3.31
3.31
4800V; R-Rated; Indoor; Hermetically Sealed, Class 1, Group D, Div. 2, Hazardous Locations; For Use with Ampgard Motor Starters (See Figure 1)
7200V; R-Rated; Indoor/Enclosure; With Ampgard Hookeye (See Figure 1)
7200V; R-Rated; Indoor/Enclosure; Bolt-On (See Figure 2)
2-26-03
SB03044
Form No. JCK, JCK-A, JCK-B, JCH, JCL,
JCL-A, JCL-B, JCG, JCR-A, & JCR-B
Page 3 of 8
Data Sheet: 6001
Bussmann
®
R-Rated Fuses
For Motor Circuit Protection
Medium Voltage
Dimensional Data
JCK, JCK-A, JCK-B, JCH,
JCL, JCL-A, JCL-B,
JCG, JCR-A, & JCR-B
INDICATOR
Showing Fuse is Open
0.38"
(9.5mm)
C
A
INDICATOR
Showing Fuse
is Open
B
Figure 1
Figure 2
2-26-03
SB03044
Form No. JCK, JCK-A, JCK-B, JCH, JCL,
JCL-A, JCL-B, JCG, JCR-A, & JCR-B
Page 4 of 8
Data Sheet: 6001
Bussmann
®
R-Rated Fuses
For Motor Circuit Protection
Medium Voltage
JCK, JCK-A, JCL, JCL-A
Time-Current Characteristic Curves–Minimum Melt
167-A
JCK, JCK-A, JCK-B, JCH,
JCL, JCL-A, JCL-B,
JCG, JCR-A, & JCR-B
Total Clearing Curves
168-A
Current Limitation Curves
184-A
INSTANTANEOUS PEAK LET THRU
CURRENT AMPERES
PROSPECTIVE SHORT CIRCUIT CURRENT (X10)
RMS SYMMETRICAL AMPERES
2-26-03
SB03044
Form No. JCK, JCK-A, JCK-B, JCH, JCL,
JCL-A, JCL-B, JCG, JCR-A, & JCR-B
Page 5 of 8
Data Sheet: 6001
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