For product data sheets, visit www.cooperbussmann.com/products/datasheet.asp 15
Low Voltage, Branch Circuit Rated Fuses
Low Voltage
Branch
Circuit
Fuses
15
Low-Peak®dual-element, time-delay fuses
LPJ_SP Class J
Now Available
With Optional
Indication
Specifications
Description:
Dual-element, time-delay fuse;
10 seconds (minimum) at 500% rated amps. Now
available with optional permanent indication on
select ratings (see Catalog Numbers table).
Dimensions: See page 11 for Class J dimensions.
Construction: Copper fuse element.
Ratings:
Volts — 600Vac (or less)
— 300Vdc (or less)
Amps — 1-600A
IR — 300,000A RMS Sym.
— 100,000A dc
Agency Information: CE, UL Listed - Special Purpose*,
Guide JFHR, File E56412, CSA Certified (200,000 AIR)
Class J per CSA-22.2 No. 248.8, Class 1422-02, File 53787.
Features and Benefits
• Separate overload and short-circuit elements provide time
delay for sizing of high inrush loads linked with Class J
current limitation.
• Selective coordination ratio of 2:1 (within Low-Peak fuse
family) prevents electrical shutdowns from extending
beyond the failed circuit.
• Series combination ratings with branch circuit breakers
allows broad range of coverage, independent of breaker
manufacturer.
Typical Applications
• Power Panelboards
• Branch Circuit Breaker Panelboard Mains
• Machinery Disconnects
• Industrial Control
Catalog Numbers (Amps)
LPJ-1SP LPJ-4 1⁄2SP LPJ-25SP** LPJ-125SP**
LPJ-1 1⁄4SP LPJ-5SP LPJ-30SP** LPJ-150SP**
LPJ-1 6⁄10SP LPJ-5 6⁄10SP LPJ-35SP** LPJ-175SP**
LPJ-1 8⁄10SP LPJ-6SP** LPJ-40SP** LPJ-200SP**
LPJ-2SP LPJ-7SP** LPJ-45SP** LPJ-225SP**
LPJ-2 1⁄4SP LPJ-8SP** LPJ-50SP** LPJ-250SP**
LPJ-2 1⁄2SP LPJ-9SP** LPJ-60SP** LPJ-300SP**
LPJ-2 8⁄10SP LPJ-10SP** LPJ-70SP** LPJ-350SP**
LPJ-3SP LPJ-12SP** LPJ-80SP** LPJ-400SP**
LPJ-3 2⁄10SP LPJ-15SP** LPJ-90SP** LPJ-450SP**
LPJ-3 1⁄2SP LPJ-17 1⁄2SP** LPJ-100SP** LPJ-500SP**
LPJ-4SP LPJ-20SP** LPJ-110SP** LPJ-600SP**
*Meets all performance requirements of UL Standard 248-8 for Class J fuses.
**Available with optional permanent replace fuse indication. To order, place “I” at end of
catalog number. Example: LPJ-6SPI.
Available with silver plated terminals. Add SP/ in front of Catalog Number.
AMPERE
RATING
1A
3A
6A
300
100
10
1
.1
.01
TIME IN SECONDS
10A
15A
30A
60A
100A
400A
1,000
100
CURRENT IN AMPERES
600A
125A
250A
200A
80A
200
10
10,000
1
Recommended Fuse Holders & Blocks For Class J 600V Fuses
• See page 10
Time-Current Characteristic Curves–Average Melt
Current Limitation Curves
INSTANTANEOUS PEAK LET-THRU CURRENT IN AMPS
100,000
10,000
1,000
100
B
A
PROSPECTIVE SHORT-CIRCUIT CURRENT
SYMMETRICAL RMS AMPS
100
1,000
10,000
100,000
200,000
600A
400A
200A
100A
60A
30A
15A
RA
AMPERE
TING
300,000
Data Sheets: 1006 (0-60) and 1007 (70-600)
With indication 1062 (6-60) and 1063 (70-600)
