®
Bussmann
JCK, JCK-A, JCK-B, JCH,
JCL, JCL-A, JCL-B,
R-Rated Fuses
For Motor Circuit Protection
Medium Voltage
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
2540V AC — JCK, JCK-A
5080V AC — JCL, JCL-A
(2R-24R)
UL Recognized:
UL Recognized (GUIDE #MSSS2, FILE # E96676)
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
2-26-03
SB03044