Technical Data 1048 Effective August 2016
Supersedes December 2015
BUSSMANN
SERIES
DFJ Class J high speed fuses
Catalog symbol:
• DFJ-_
Description:
The Bussmann™ series DFJ drive fuse is a
high speed, current-limiting fuse that provides
maximum protection for AC and DC drives
and controllers and meet NEC® branch circuit
protection requirements. The drive fuse has the
lowest I2t of any branch circuit fuse to protect
power semiconductor devices that utilize
diodes, GTOs, SCRs and SSRs.
Specications:
Ratings
• Volts
• 600Vac (or less)
• 450Vdc (or less, 15-600A)
• Amps 1-600A
• IR
• 200kA RMS Sym.
• 100kA DC
Agency information
• UL® Listed Standard 248-8, Class J,
Guide JDDZ, File E4273
• CSA® Certified, C22.2 No. 248.8,
Class 1422-02, File 53787
• RoHS compliant
• CE
Features:
• Easily coordinated with existing and new
variable speed drives and electric controllers.
• Standard Class J dimensions allow using
readily available fuse blocks, holders and
switches.
• Has the lowest let-through energy of any
branch circuit overcurrent protective device.
Typical applications
• Protection of AC and DC drives
• Equipment using power semiconductor
devices
Catalog numbers (amps):
DFJ-1 DFJ-15 DFJ-60 DFJ-200
DFJ-2 DFJ-17.5 DFJ-70 DFJ-225
DFJ-3 DFJ-20 DFJ-80 DFJ-250
DFJ-4 DFJ-25 DFJ-90 DFJ-300
DFJ-5 DFJ-30 DFJ-100 DFJ-350
DFJ-6 DFJ-35 DFJ-110 DFJ-400
DFJ-8 DFJ-40 DFJ-125 DFJ-450
DFJ-10 DFJ-45 DFJ-150 DFJ-500
DFJ-12 DFJ-50 DFJ-175 DFJ-600
Carton quantity:
Amp rating Carton qty.
1–60 10
70–200 5
225–600 1
2
Technical Data 1048
Effective August 2016
DFJ Class J high speed fuses
Eaton.com/bussmannseries
Electrical characteristics:
Catalog
number Amps
I2t (A2 Sec) @ 600Vac/100kA Watts
lossPre-arc Clearing
DFJ-15 15 4110 4.1
DFJ-20 20 8 365 4.0
DFJ-25 25 12 610 4.9
DFJ-30 30 20 1000 5.5
DFJ-35 35 55 110 0 6.8
DFJ-40 40 90 1900 8.6
DFJ-50 50 140 2800 8.7
DFJ-60 60 290 6000 8.5
DFJ-70 70 450 3100 12
DFJ-80 80 650 4600 13
DFJ-90 90 1010 7200 13
DFJ-100 100 1460 10,500 13
DFJ-110 110 1710 9500 17
DFJ-125 125 3580 20,000 15
DFJ-150 150 5080 28,000 19
DFJ-175 175 6310 35,000 23
DFJ-200 200 9850 54,500 24
DFJ-225 225 11,420 51,000 29
DFJ-250 250 17,000 74,500 30
DFJ-300 300 23,500 103,000 36
DFJ-350 350 38,800 170,000 39
DFJ-400 400 62,200 272,000 40
DFJ-450 450 44,600 270,000 56
DFJ-500 500 79,500 480,000 52
DFJ-600 600 138,000 830,000 57
Dimensions - in:
6.0"
8.0"
(± 0.03)
3.75"
.74" 2.13" .38"
.53"
2"
450A to
600A 2.5"
7.13"
(± 0.03)
5.25"
3.38"
.58"
1.63"
1.88"
.41"
2.11"
.25"
225A to
400A
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"
.13"
1"
.43"
1.13"
.28"
.19"
1.63"
110A to
200A
2.25˝
0.50˝ 0.81˝
2.38˝
0.63˝ 1.06˝
Recommended fuse blocks and holders:
Fuse
amps 1-Pole 2-Pole 3-Pole
“Pyramid” blocks (data sheet No. 1108)
up to 30 — — JP60030-3_
CH holders (data sheet No. 2144)
up to 30 CH30J1_ CH30J2_ CH30J3_
35-60 CH60J1_ CH60J2_ CH60J3_
Safety J™ holders (data sheet No. 1152)
up to 30 JT60030_ — —
35-60 JT60060_ — —
JM modular fuse blocks (data sheet No. 3192 and 10289)
up to 30 JM60030-1_ JM60030-2_ JM60030-2_
35-60 JM60060-1CR JM60060-2CR JM60060-3CR
70-100 JM60100-1CR JM60100-2CR JM60100-3CR
110-200 JM60200-1CR JM60200-2CR JM60200-3CR
225-400 JM60400-1CR JM60400-2CR JM60400-3CR
450-600 JM60600-1CR JM60600-2CR JM60100-3CR
JM power distribution fuse blocks (data sheet No. 10192)
up to 30 JM60030-1MW_ JM60030-2MW_ JM60030-3MW_
35-60 JM60060-1MW_ JM60060-2MW_ JM60060-3MW_
70-100 JM60100-1MW14 JM60100-2MW14 JM60100-3MW14
110-200 JM60200-1MW16 JM60200-2MW16 JM60200-3MW16
225-400 JM60400-1MW16 JM60400-2MW16 JM60400-3MW16
JM60400-1MW26* JM60400-2MW26* JM60400-3MW26*
* Lineside dual box lug terminal.
3
Technical Data 1048
Effective August 2016
DFJ Class J high speed fuses
Eaton.com/bussmannseries
Time-current curves — average melt
Current in amps
Time in seconds
Current in amps
DFJ Class J high speed fusesTechnical Data 1048
Effective August 2016
Eaton, Bussmann and Low-Peak 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.
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
United States
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. 1048 – BU-SB131065
August 2016
For Eaton’s Bussmann series
product information,
call 1-855-287-7626 or visit:
Eaton.com/bussmannseries
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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
Peak current in amps
Available RMS current in amps
