LOW-PEAK®LPJ_SPI
Dual-Element, Time-Delay Fuses 70 to 600A
Class J – 600 Volt
Form No. LPJ 70-600
Page 1 of 3
Data Sheet: 1063
Bussmann®
8-26-04 SB04295
Dimensional Data
Catalog Symbol: LPJ-_SPI
Dual-Element, Time-Delay – 10 seconds (minimum) at 500%
rated current
Current-Limiting
Ampere Rating: 70 to 600A
Voltage Rating:
ac: 600V (or less)
dc: 300V (or less)
Interrupting Rating:
ac: 300,000A RMS Sym.
dc: 100,000A
Agency Information:
UL Listed – Special Purpose†, Guide JFHR, File E56412
CSA Certified, Class J per CSA C22.2 No. 248.8,
Class 1422-02, File 53787
†Meets all performance requirements of UL Standard 248-8 for Class J fuses.
General Information:
• Permanent replacement fuse indication.
• True dual-element fuses with a minimum 10 second time-
delay 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-of-
response 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, hence 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.
CE logo denotes compliance with European Union Low Voltage Directive
(50-1000Vac, 75-1500Vdc). Refer to Data Sheet: 8002 or contact
Bussmann Application Engineering at 636-527-1270 for more information.
Recommended fuseblocks for
Class J 600V fuses
See Data Sheet: 1114
For non-indicating version, the LPJ_SP
is available. See Data Sheet: 1007.
5.75"
(– 0.03)
4.38"
3.0"
.43" 1.38"
4.63"
(– 0.03)
3.63"
2.63"
70A to 100A .28"
.75" 1.13" (– 0.03)
.13"
1"
.43"
1.13"
.28"
.19"
1.63" (– 0.03)
110A to
200A
450A to 600A
225A to 400A
Catalog Symbol and Ampere Ratings
LPJ-70SPI LPJ-125SPI LPJ-250SPI LPJ-500SPI
LPJ-80SPI LPJ-150SPI LPJ-300SPI LPJ-600SPI
LPJ-90SPI LPJ-175SPI LPJ-350SPI —
LPJ-100SPI LPJ-200SPI LPJ-400SPI —
LPJ-110SPI LPJ-225SPI LPJ-450SPI —
Carton Quantity and Weight
Ampere Carton Weight*
Ratings Qty. Lbs. Kg.
70–100 5 1.69 0.767
110–200 5 4.21 1.910
225–400 1 1.67 0.758
450–600 1 2.80 1.270
*Weight per carton.
Bussmann®
LOW-PEAK®LPJ_SPI
Dual-Element, Time-Delay Fuses 70-600A
Class J – 600 Volt
Form No. LPJ 70-600
Page 2 of 3
Data Sheet: 1063
8-26-04 SB04295
AMPERE
RATING
80A
300
100
10
1
.1
.01
TIME IN SECONDS
100A
125A
200A
250A
400A
600A
10,000
1,000
100
CURRENT IN AMPERES
200
Time-Current Characteristic Curves–Average Melt
LOW-PEAK®LPJ_SPI
Dual-Element, Time-Delay Fuses 70-600A
Class J – 600 Volt
Form No. LPJ 70-600
Page 3 of 3
Data Sheet: 1063
Bussmann®
8-26-04 SB04295
The only controlled copy of this Data Sheet is the electronic read-only version located on the Bussmann Network Drive. All other copies of this document are by definition uncontrolled. This bulletin is
intended to clearly present comprehensive product data and provide technical information that will help the end user with design applications. Bussmann reserves the right, without notice, to change
design or construction of any products and to discontinue or limit distribution of any products. Bussmann also reserves the right to change or update, without notice, any technical information con-
tained in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications.
Current-Limitation Curves
