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LPJ-SP Class J Low-Peak® Dual-element Time-delay Fuses

LPJ-SP Class J Low-Peak® Dual-element Time-delay Fuses

LPJ_SP Class J
Available With Indication

Description: Dual-element, time-delay fuse; 10 seconds (minimum) at 500% rated amps. Now available with optional indication on select ratings

Ratings:
Volts: 600Vac (or less); 300Vdc (or less)
Amps: 1-600A
IR: 300kA RMS Sym. 100kA dc
Agency Information: CE, UL Listed - Special Purpose*, Guide JFHR, File E56412, CSA Certified (200k AIR) Class J per CSA-22.2 No. 248.8, Class 1422-02, File 53787.

General Information:
• True dual-element fuses with a minimum 10 second timedelay at 500% overload.
• Long time-delay minimizes needless fuse openings due to temporary overloads and transient surges.
• Can often be sized for back-up protection against motor burnout from overload or single-phasing if other overload protective devices fail.
• High interrupting rating to safely interrupt overcurrents up to 300,000A.
• High degree of current limitation due to the fast speed-ofresponse to short-circuits.
• Faster response to damaging short-circuit currents than mechanical overcurrent protective devices.
• Reduces let-through thermal and magnetic forces in order to protect low withstand rated components.
• Proper sizing provides “no damage” Type “2” coordinated protection for NEMA and IEC motor control in accordance with IEC Standard 947-4-1.
• Dual-element fuses have lower resistance than ordinary fuses so they run cooler.
• Lower watts loss reduces power consumption.
• Unique dimensions assure that another class of fuse with a lesser voltage rating, interrupting rating or current-Iimiting ability cannot be substituted.
• Space-saving package for equipment down sizing.

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

Dimensions

Catalog Numbers (Amps)

Catalog numbers Amp rating Catalog numbers Amp rating
LPJ-1SP  1A LPJ-25SP**  25A
LPJ-1-1/4SP  1.25A LPJ-30SP**  30A
LPJ-1-6/10SP  1.6A LPJ-35SP**  35A
LPJ-1-8/10SP  1.8A LPJ-40SP**  40A
LPJ-2SP  2A LPJ-45SP**  45A
LPJ-2-1/4SP  2.25A LPJ-50SP**  50A
LPJ-2-1/2SP  2.5A LPJ-60SP**  60A
LPJ-2-8/10SP  2.8A LPJ-70SP**  70A
LPJ-3SP  3A LPJ-80SP**  80A
LPJ-3-2/10SP  3.2A LPJ-90SP**  90A
LPJ-3-1/2SP  3.5A LPJ-100SP**  100A
LPJ-4SP  4A LPJ-110SP**  110A
LPJ-4-1/2SP  4.5A LPJ-125SP**  125A
LPJ-5SP  5A LPJ-150SP**  150A
LPJ-5-6/10SP  5.6A LPJ-175SP**  175A
LPJ-6SP**  6A LPJ-200SP**  200A
LPJ-7SP**  7A LPJ-225SP**  225A
LPJ-8SP**  8A LPJ-250SP**  250A
LPJ-9SP**  9A LPJ-300SP**  300A
LPJ-10SP**  10A LPJ-350SP**  350A
LPJ-12SP**  12A LPJ-400SP**  400A
LPJ-15SP**  15A LPJ-450SP**  450A
LPJ-17-1/2SP**  17.5A LPJ-500SP**  500A
LPJ-20SP**  20A LPJ-600SP**  600A

*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. As below table.
Available with silver plated terminals. Add SP/ in front of Catalog Number.

Catalog Numbers (With optional permanent replace fuse indication)

LPJ-6SPI LPJ-35SPI LPJ-150SPI
LPJ-7SPI LPJ-40SPI LPJ-175SPI
LPJ-8SPI LPJ-45SPI LPJ-200SPI
LPJ-9SPI LPJ-50SPI LPJ-225SPI
LPJ-10SPI LPJ-60SPI LPJ-250SPI
LPJ-12SPI LPJ-70SPI LPJ-300SPI
LPJ-15SPI LPJ-80SPI LPJ-350SPI
LPJ-17-1/2SPI LPJ-90SPI LPJ-400SPI
LPJ-20SPI LPJ-100SPI LPJ-450SPI
LPJ-25SPI LPJ-110SPI LPJ-500SPI
LPJ-30SPI LPJ-125SPI LPJ-600SPI

Time-Current Characteristic Curves–Average Melt

Current Limitation Curves