Technical Data 1025 Effective December 2016
Supersedes August 2013
JJN Limitron™ 300Vac, 1-1200A,
fast-acting Class T fuses
Catalog Symbol:
• JJN-(amp)
Description:
Eaton’s Bussmann™ series Limitron™ advanced
protection Class T current -limiting, fast-acting
fuses.
Specifications:
Ratings
• Volts
• 300 Vac (1-10 A)
• 300 Vac, 160 Vdc (15-600 A)
• 300 Vac, 170 Vdc (700-1200 A)
• Amps — 1-1200 A
• IR
• 200kA Vac RMS Sym.
• 20kA Vdc (15-600 A)
• 100kA Vdc (700-1200 A)
Agency Information
• UL® Listed, Std. 248-15, Class T, Guide JDDZ,
File E4273
• CSA® Certified, C22.2 No. 248.15, Class 1422-
02, File 53787
• CE
• RoHS compliant
Catalog numbers (amps)
JJN-1 JJN-35 JJN-110 JJN-400
JJN-2 JJN-40 JJN-125 JJN-450
JJN-3 JJN-45 JJN-150 JJN-500
JJN-6 JJN-50 JJN-175 JJN-600
JJN-10 JJN-60 JJN-200 JJN-700
JJN-15 JJN-70 JJN-225 JJN-800
JJN-20 JJN-80 JJN-250 JJN-1000
JJN-25 JJN-90 JJN-300 JJN-1200
JJN-30 JJN-100 JJN-350
Carton quantity:
Amp rating Carton qty.
Up to 60 10
70–100 5
110–1200 1
Features:
• Provides 10X better current limitation to help
prevent equipment damage caused by short-
circuit events.
• 200 kA interrupting rating complies with NEC®
Section 110.9 for today’s large capacity systems.
• Fast-acting fuse helps prevent equipment
damage caused by short-circuit events.
• Small, space-saving fuses provide a high
degree of current limitation on short-circuits for
excellent component protection.
• Ideal for critical industrial or commercial
applications that have specific current limitation
requirements.
Recommended fuse blocks*
Fuse
amps 1-pole 2-pole 3-pole 4-Pole
up to 30 — T30030-2_ T30030-3_ T30030-4_
35-60 — T30060-2_ T30060-3_ T30060-4_
70-100 — T30100-1_ T30100-2_ T30100-3_
110-200 T30200-1_ — — —
200 1B0083 — — —
225-400 T30400-1_ — — —
450- 600 T30600-1_ — — —
* For additional information, see data sheet no. 1115.
2
Technical Data 1025
Effective December 2016
JJN — 300Vac, 1-1200A, fast-acting Class T fuses
Eaton.com/bussmannseries
Dimensions – in
0.84"
0.86"
1 to 30A
35 to 60A
2.75"
( 0.04)
1.84"
1"
( 0.04)
0.75"
( 0.02)
0.56" Dia.
( 0.02)
.41" Dia.
( 0.02)
0.88"
( 0.02)
0.88"
( 0.02)
2.16"
( 0.02)
1.56"
70 to 100A
0.84"
2.44"
( 0.02)
1.69"
0.88"
( 0.02)
110 to 200A
225 to 400A
0.88"
0.92"
1.08"
2.53"
4"
( 0.04)
2"
( 0.04)
2.22"
3.38"
( 0.04)
1.75"
( 0.04)
801 to 1200A
601 to 800A
450 to 600A
2.03"
1.25"
( 0.04)
0.484"
(Typ. 2)
3.06"
( 0.04)
0.284"
(Typ. 2)
0.562"
(Typ. 2)
0.609"
(Typ. 2)
0.406"
(Typ. 2)
0.344"
(Typ. 2)
Custom designs
Printed circuit board versions available up to 60 amps. Consult your
Bussmann series product representative details.
JJN-XXL Dimensions - in
A
B
0.5"
0.19" MIN.
1.74"
1.39"
0.87"
C
L
Fuse amps/catalog number A B
JJN-(1-30)L 0.406 0.125
JJN-(35-60)L 0.563 0.125
JJN-(35-60)L-01 0.563 0.165
JJN-XXLS Dimensions - in
The JJN-XXL and JJN-XXLS products are UL Component Recognized
under Guide JFHR2, File E56412. Contact your Bussmann series
product representative for RoHS status.
3
Technical Data 1025
Effective December 2016
JJN — 300Vac, 1-1200A, fast-acting Class T fuses
Eaton.com/bussmannseries
Time-current curves - average melt
CURRENT IN AMPS
TIME IN SECONDS
20
100
1000
10,000
300
100
10
1
0.1
0.01
60A
100A
200A
30A
400A
AMP RATING
600A
15A
800A
1000A
1200A
Eaton.com/bussmannseries
JJN — 300Vac, 1-1200A, fast-acting Class T fuses
Technical Data
Effective 2016
Eaton, Bussmann and Limitron are valuable
trademarks of Eaton in the U.S. 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.
NEC is a registered trademark of the National
Fire Protection Association, Inc.
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
© 2016 Eaton
All Rights Reserved
Printed in USA
Publication No. 1025 — BU-SB13734
December 2016
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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
100,000
80,000
60,000
40,000
30,000
20,000
10,000
8000
6000
4000
3000
2000
1000
800
600
400
300
200
100
200
300
400
600
800
1000
2000
3000
4000
6000
8000
10,000
20,000
30,000
40,000
60,000
80,000
100,000
200,000
200,000
400,000
300,000
600
400
200
100
60
30
15
AMP RATING
800
1200
B
A
RMS SYMMETRICAL CURRENT IN AMPS
A-B = ASYMMETRICAL AVAILABLE PEAK (2.3 X SYM RMS AMPS)
INSTANTANEOUS PEAK-LET-THROUGH CURRENT IN AMPS
Current-limiting effects
Prosp.
S.C.C. Let-through current (apparent RMS Sym. vs. fuse rating)
—15 A 30 A 60 A 100 A 200 A 400 A 600 A 800 A 1200 A
500 1000 1000 1000 1000 1000 1000 1000 1000 1000
1000 1000 1000 1000 1000 1000 1000 1000 1000 1000
5000 1000 1000 1000 1000 2000 3000 5000 5000 5000
10,000 1000 1000 1000 2000 2000 4000 6000 7000 9000
15,000 1000 1000 1000 2000 3000 4000 6000 9000 10,000
20,000 1000 1000 1000 2000 3000 5000 7000 10,000 11,000
25,000 1000 1000 2000 2000 3000 5000 7000 10,000 12,000
30,000 1000 1000 2000 2000 3000 5000 8000 11,000 13,000
35,000 1000 1000 2000 3000 4000 6000 8000 11,000 13,000
40,000 1000 1000 2000 3000 4000 6000 9000 11,000 13,000
50,000 1000 1000 2000 3000 4000 7000 9000 12,000 15,000
60,000 1000 1000 2000 3000 4000 7000 10,000 13,000 16,000
70,000 1000 1000 2000 3000 5000 7000 10,000 14,000 17,000
80,000 1000 2000 2000 3000 5000 8000 11,000 15,000 17,000
90,000 1000 2000 2000 3000 6000 8000 11,000 15,000 18,000
100,000 1000 2000 2000 4000 6000 8000 12,000 16,000 19,000
150,000 1000 2000 3000 4000 6000 9000 13,000 17,000 22,000
200,000 2000 2000 3000 4000 7000 9000 15,000 19,000 23,000
