Low Voltage, Branch Circuit Rated Fuses
Low-Peak® dual-element, time-delay fuses
Time-Current Characteristic Curves–Average Melt
LPJ_SP Class J
AMPERE
RATING
Now Available
With Optional
Indication
300
200
100
10
1
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
.1
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.
.01
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.
CURRENT IN AMPERES
Current Limitation Curves
B
100,000
600A
400A
• Series combination ratings with branch circuit breakers
allows broad range of coverage, independent of breaker
manufacturer.
200A
100A
60A
10,000
1,000
30A
15A
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-30SP**
LPJ-35SP**
LPJ-40SP**
LPJ-45SP**
LPJ-50SP**
LPJ-60SP**
LPJ-70SP**
LPJ-80SP**
LPJ-90SP**
LPJ-100SP**
LPJ-110SP**
LPJ-125SP**
LPJ-150SP**
LPJ-175SP**
LPJ-200SP**
LPJ-225SP**
LPJ-250SP**
LPJ-300SP**
LPJ-350SP**
LPJ-400SP**
LPJ-450SP**
LPJ-500SP**
LPJ-600SP**
LPJ-1 1⁄
4
SP
LPJ-5SP
A
LPJ-1 6⁄10SP
LPJ-1 8⁄10SP
LPJ-2SP
LPJ-5 6⁄10SP
LPJ-6SP**
LPJ-7SP**
LPJ-8SP**
LPJ-9SP**
LPJ-10SP**
LPJ-12SP**
LPJ-15SP**
100
LPJ-2 1⁄
LPJ-2 1⁄
4
SP
SP
2
PROSPECTIVE SHORT-CIRCUIT CURRENT
SYMMETRICAL RMS AMPS
LPJ-2 8⁄10SP
LPJ-3SP
LPJ-3 2⁄10SP
LPJ-3 1⁄
2SP
LPJ-17 1⁄
LPJ-20SP**
2SP**
LPJ-4SP
*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.
Recommended Fuse Holders & Blocks For Class J 600V Fuses
• See page 10
Data Sheets: 1006 (0-60) and 1007 (70-600)
With indication 1062 (6-60) and 1063 (70-600)
For product data sheets, visit www.cooperbussmann.com/products/datasheet.asp
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