Technical Data 1006 Effective August 2018
Supersedes February 2016
Low-Peak™ LPJ Class J 600Vac/300Vdc, 1-60A,
dual element, time-delay fuses
Catalog symbol:
• LPJ-(amp)SP (non-indicating)
• LPJ-(amp)SPI (indicating)
Description:
Bussmann® series Ultimate protection LPJ Class
J dual element, current-limiting, time-delay fuses
available with optional open fuse indication. Time-
delay – 10 seconds (minimum) at 500% of rated
current.
Specifications:
Ratings
• Volts
• 600Vac
• 300Vdc*
• Amps 1-60A
• IR
• 300kA Vac RMS Sym.
• 100kA Vdc
* Indicating versions not Vdc rated.
Agency information
• UL® Listed, Guide JDDZ, File E4273
• CSA® Certified, Class 1422-02, File 53787,
Class J per CSA 22.2 No. 248.
• CE
• RoHS compliant
Catalog numbers (amps) – non-indicating fuses
LPJ-1SP LPJ-3SP LPJ-7SP* LPJ-25SP*
LPJ-1-1/4SP LPJ-3-2/10SP LPJ-8SP* LPJ-30SP*
LPJ-1-6/10SP LPJ-3-1/2SP LPJ-9SP* LPJ-35SP*
LPJ-1-8/10SP LPJ-4SP LPJ-10SP* LPJ-40SP*
LPJ-2SP LPJ-4-1/2SP LPJ-12SP* LPJ-45SP*
LPJ-2-1/4SP LPJ-5SP LPJ-15SP* LPJ-50SP*
LPJ-2-1/2SP LPJ-5-6/10SP LPJ-17-1/2SP* LPJ-60SP*
LPJ-2-8/10SP LPJ-6SP* LPJ-20SP*
* Open fuse indication available by inserting the suffix
“I,” e.g., LPJ-15SPI. Requires 75Vac minimum voltage.
Indicating fuses are not Vdc rated.
Carton quantity:
Amp rating Carton qty.
1–60 10
Dimensions - in
2.38"
0.63"
35 to 60A
1.06"
0.5"
1 to 30A
0.81"
2.25"
(±0.03)
(±0.03) (±0.03)
(±0.03)
Features:
• Industry’s only UL Listed and CSA Certified fuse
with a 300kA interrupting rating that allows for
simple, worry-free installation in virtually any
application.
• Fast short-circuit protection and dual-element,
time-delay performance provide ultimate
protection.
• Reduces existing fuse inventory by up to 33%
when upgrading to Low-Peak fuses.
• Consistent 2:1 ampacity ratios for all Low-Peak
fuses make selective coordination easy.
• Long time-delay minimizes needless fuse
openings due to temporary overloads and
transient surges.
• Current-limitation protects downstream
components against damaging thermal and
magnetic effects of short-circuit currents.
• Dual-element fuses have lower resistance than
ordinary fuses so they run cooler. They can
often be sized for back-up protection against
motor burnout from overload or single-phasing if
other overload protective devices fail.
• Proper sizing can provide “no damage” Type
2 coordinated protection for NEMA® and IEC®
motor controllers.
• Space-saving package for equipment
downsizing.
Available with
easy
ID™
open fuse indication
2
Technical Data 1006
Effective August 2018
Low-Peak™ LPJ Class J 600Vac/300Vdc, 1-60A,
dual element, time-delay fuses
Eaton.com/bussmannseries
Recommended fuse blocks and holders:
Fuse amps 1-Pole 2-Pole 3-Pole
Modular open blocks with optional covers
0-30 JM60030-1_ JM60030-2_ JM60030-3_
35-60 JM60060-1_ JM60060-2_ JM60060-3_
“Pyramid” blocks
0-30 — — JP60030-3_
CH holders
0-30 CH30J1_ CH30J2_ CH30J3_
35-60 CH60J1_ CH60J2_ CH60J3_
Safety J™ holders
0-30 JT60030_ — —
35-60 JT60060_ — —
For additional information on the Class J fuse blocks and holders,
see data sheets no. 10289 (modular open blocks), no.1108 (pyramid
blocks), no. 2144 (CH) and no. 1152 (Safety J).
Fuse reducers for Class J fuses:
Equipment fuse clips
Desired fuse
(case) size
Catalog numbers
(pairs)
60A 30A J-63
100A 30A J-13
60A J-16
200A 60A J-26†
† Not for bolt-in applications.
3
Technical Data 1006
Effective August 2018
Low-Peak™ LPJ Class J 600Vac/300Vdc, 1-60A,
dual element, time-delay fuses
Eaton.com/bussmannseries
Time-current curves - average melt
AMP RATING
1A
3A
6A
300
100
10
1
0.1
0.01
TIME IN SECONDS
10A
15A
30A
60A
1000
10
1
CURRENT IN AMPS
200
100
Low-Peak™ LPJ Class J 600Vac/300Vdc, 1-60A,
dual element, time-delay fuses
Technical Data 1006
Effective August 2018
Eaton, Bussmann, Low-Peak and Safety J are
valuable trademarks of Eaton in the US and
other countries. You are not permitted to use
the Eaton trademarks without prior written
consent of Eaton.
CSA is a registered trademark of the Canadian
Standards Group.
IEC is a registered trademark of the
International Electrotechnical Commission.
NEMA is a registered trademark of the
National Electrical Manufacturers Association.
UL is a registered trademark of the
Underwriters Laboratories, Inc.
Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
Eaton.com
Bussmann Division
114 Old State Road
Ellisville, MO 63021
United States
Eaton.com/bussmannseries
© 2018 Eaton
All Rights Reserved
Printed in USA
Publication No. 1006 — BU-SB13688
August 2018
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The only controlled copy of this data sheet is the electronic read-only version located on the Eaton 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. Eaton reserves the right, without notice, to change design or construction of any products and to discontinue or limit
distribution of any products. Eaton also reserves the right to change or update, without notice, any technical information contained in this bulletin. Once
a product has been selected, it should be tested by the user in all possible applications.
Current-limitation curves: Current-limiting effects:
Prospective
S.C.C.
Let-through current
(apparent RMS symmetrical vs. fuse rating)
15A 30A 60A
1000 1000 1000 1000
3000 1000 1000 1000
5000 1000 1000 1000
10,000 1000 1000 2000
15,000 1000 1000 2000
20,000 1000 1000 2000
25,000 1000 1000 2000
30,000 1000 1000 2000
35,000 1000 1000 2000
40,000 1000 2000 3000
50,000 1000 2000 3000
60,000 1000 2000 3000
80,000 1000 2000 3000
100,000 1000 2000 4000
150,000 1000 2000 4000
200,000 2000 3000 4000
250,000 2000 3000 5000
300,000 2000 3000 5000
B
A
INSTANTANEOUS PEAK-LET-THROUGH CURRENT IN AMPS
15A
30A
60A
9000
8000
7000
7000
6000
6000
100000
5000
4000
4000
90000
3000
2000
1000
3000
70000
80000
70000
60000
50000
60000
200000
20000
2000
40000
100000
50000
10000
5000
1000
30000
90000
80000
40000
9000
8000
30000
20000
10000
300000
900
800
700
600
500
400
300
200
100
100
400
200
300
700
500
600
900
800
RMS SYMMETRICAL CURRENT IN AMPS
A-B = ASYMMETRICAL AVAILABLE PEAK (2.3 X SYM RMS AMPS)
AMP RATING
