General Purpose US
US Fuses
Fuses
General Purpose
American Power Fuses
AMP-TRAP 2000
AJT (Class J TD)
®
SMARTSPOT
®
with Maximum circuit
protection
Amp-trap 2000
®
SmartSpot
®
AJT fuses now
provide a visual open fuse indicator. With advanced
material technology added to the existing product line
the AJT fuse provides IEC Type “2” (No Damage)
protection to main, feeder, and branch circuits, for all
types of loads — yet, they require only half the mounting
space needed for 600VAC Class RK fuses. AJT’s time delay
characteristics for handling typical in-rush currents,
its current limiting ability.
Highlights
•
•
•
•
•
Smart Spot Indicator
Time Delay
Highly Current Limiting
DC Ratings
Optional Mechanical Indicator
(70 to 600A fuses)
Features /Benefits
• Solid State SmartSpot Indicator
• Time delay for motor starting and transformer inrush
• 300kA interrupting rating - self-certified,
UL witnessed tests
• Extremely current limiting for low peak let-thru current
• Most current limiting UL class fuse
• Small footprint requires less mounting space and
allows smaller, more economical fuse blocks
• Easy 2-to-1 selectivity for prevention of nuisance
shutdowns
• Unique Class J dimensions prevent replacement errors
• High-visibility orange label gives instant recognition
• Metal-embossed date and catalog number for
traceability and lasting identification
• Fiberglass body provides dimensional stability in
harsh industrial settings
• High-grade silica filler ensures fast arc quenching
• Optional EI Indicator/Switch mount for AJT70 to
600 open fuse indication
Applications
•
•
•
•
•
•
•
•
•
•
Motor Circuits
Mains
Feeders
Branch Circuits
Lighting, Heating and General Loads
Transformers
Control Panels
Circuit Breaker Back-up
Bus Duct
Load Centers
Approvals
AJT (1-600):
• UL Listed to Standard 248-8
• DC Listed to UL Standard 198L
• CSA Certified to Standard
C22.2 No. 248.8
• IEC 269-2-1
AJT (70-600) EI:
• UL Component Recognized
• DC Tested to UL Standard 198L
Ratings
AC: 1 to 600A
600VAC, 200kA I.R. (self certified for 600VAC,
300kA I.R.,UL witnessed)
DC: 1 to 600A
500VDC, 100kA I.R.
GPUS
1
12/04
General Purpose US Fuses
General Purpose US Fuses
American Power Fuses
AMP-TRAP 2000
AJT (Class J TD)
®
Standard Fuse Ampere Ratings, Catalog Numbers and Ref Numbers
Ampere
Rating
Catalog
Number
Reference
Number
Ampere
Rating
Catalog
Number
Reference
Number
1
1-1/4
1-1/2
1-6/10
1-8/10
2
2-1/4
2-1/2
2-8/10
3
3-2/10
3-1/2
4
4-1/2
5
5-6/10
6
6-1/4
7
8
9
10
12
15
17-1/2
20
AJT1
AJT1-1/4
AJT1-1/2
AJT1-6/10
AJT1-8/10
AJT2
AJT2-1/4
AJT2-1/2
AJT2-8/10
AJT3
AJT3-2/10
AJT3-1/2
AJT4
AJT4-1/2
AJT5
AJT5-6/10
AJT6
AJT6-1/4
AJT7
AJT8
AJT9
AJT10
AJT12
AJT15
AJT17-1/2
AJT20
X214748
C215765
B215258
G216275
H216782
P219364
A200882
T223094
M201422
Q211683
L212714
W212194
W214241
Y214749
H216276
J216783
D217813
P218329
Q219365
M219891
D222574
Y217302
C217812
N218328
A218845
Z201939
25
30
35
40
45
50
60
70
80
90
100
110
125
150
175
200
225
250
300
350
400
450
500
600
AJT25
AJT30
AJT35
AJT40
AJT45
AJT50
AJT60
AJT70*
AJT80*
AJT90*
AJT100*
AJT110*
AJT125*
AJT150*
AJT175*
AJT200*
AJT225*
AJT250*
AJT300*
AJT350*
AJT400*
AJT450*
AJT500*
AJT600*
X211160
W213229
M213727
C215259
D215766
Z217303
B218846
L201421*
W211159*
V212193*
B215764*
F216780*
A217810*
Y218843*
K219889*
Y200880*
V211158*
K212713*
L213726*
W214747*
G216781*
M218327*
N219363*
C222573*
*For optional indicator/switch mount add EI. For Example: AJT100EI .See table below
Note:
Indicator not available for rating 1A to 7A.
Recommended Fuse Blocks With Box Connectors for Amp-trap
®
Class J Fuses
Fuse
Ampere
Rating
600V OR LESS
1 Pole
Catalog Number
Reference Number
Catalog Number
3 pole
Reference Number
0-30
31-60
61-100
101-200
201-400
401-600
US3J1I
US6J1I
61036J
62001J
64031J
6631J
M212922
F222047
Z201640
D214455
X218543
P201125
US3J3I
US6J3I
61038J
62003J
64033J
6633J
K214967
M211381
G212917
E214962
S219068
A201641
A variety of pole configurations and termination provisions is available.
12/04
GPUS
2
General Purpose US Fuses
General Purpose US Fuses
American Power Fuses
AMP-TRAP 2000
AJT (Class J TD)
®
AJT 1 to 600
MELTING TIME – CURRENT DATA, 600V FUSES
TIME IN SECONDS
Peak Let-Thru Current Data
AJT 30 to 600, 600 Volts AC
MAXIMUM INSTANTANEOUS PEAK LET-THRU AMPERES
Three Phase Motor Fuse Selection
230 Volt Three Phase Class J AJT Fuses
Motor
HP
Full
Load
Amperes
at 230V
Recommended Fuse Ampere Rating
Motor Acceleration Times
Minimum
2 sec.
Typical
5 sec.
Heavy Load
Over 5 sec.
AVAILABLE CURRENT IN RMS SYMMETRICAL AMPERES
1/2
3/4
1
1-1/2
2
3
5
7-1/2
10
15
20
25
30
40
50
60
75
100
125
150
200
GPUS
4
2.2
3.2
4.2
6
6.8
9.6
15.2
22
28
42
54
68
80
104
130
154
192
248
312
360
480
3
4
5
8
8
12
20
30
35
50
70
80
100
125
175
200
250
300
400
450
600
3-1/2
5
6-1/4
9
10
15
25
35
40
60
80
100
125
150
200
225
300
350
450
500
-
CURRENT IN AMPERES
4
6
8
10
12
17-1/2
30
40
50
80
100
125
150
200
250
300
350
450
600
600
-
12/04
General Purpose US
US Fuses
Fuses
General Purpose
American Power Fuses
AMP-TRAP 2000
AJT (Class J TD)
®
Three Phase Motor Fuse Selection
380 Volt Three Phase Class J AJT Fuses
Full
Motor
HP
Load
Amperes
at 380V
2 sec.
Recommended Fuse Ampere Rating
Motor Acceleration Times
Minimum
Typical
5 sec.
Heavy Load
Over 5 sec.
Three Phase Motor Fuse Selection
575 Volt Three Phase Class J AJT Fuses
Full
Motor
HP
Load
Amperes
at 575V
2 sec.
Recommended Fuse Ampere Rating
Motor Acceleration Times
Minimum
Typical
5 sec.
Heavy Load
Over 5 sec.
1/2
3/4
1
1-1/2
2
3
5
7-1/2
10
15
20
25
30
40
50
60
75
100
125
150
200
1.3
1.9
2.5
3.6
4.1
5.8
9.2
13.3
17
25
33
41
48
68
79
93
116
150
189
218
291
1-6/10
2-1/2
3-2/10
4-1/2
5
8
12
17-1/2
20
30
40
50
60
80
90
110
150
175
250
300
350
2
2-8/10
4
5-6/10
6
8
15
20
25
40
50
60
80
100
125
150
175
225
300
350
450
2-1/4
3-1/2
4-1/2
6
7
10
17-1/2
25
30
45
60
70
90
125
150
175
200
250
350
400
500
1/2
3/4
1
1-1/2
2
3
5
7-1/2
10
15
20
25
30
40
50
60
75
100
125
150
200
250
300
.9
1.3
1.7
2.4
2.7
3.9
6.1
9
11
17
22
27
32
41
52
62
77
99
125
144
192
240
289
1-1/4
1-6/10
2-1/4
3
3-2/10
5
8
12
15
20
30
35
40
50
70
80
100
125
150
175
250
300
350
1-1/2
2
2-1/2
3-1/2
4
6
9
15
17-1/2
25
35
40
50
60
80
90
125
150
200
225
300
350
450
1-6/10
1-1/2
3
4-1/2
5
7
12
17-1/2
20
30
35
50
60
70
90
110
150
175
225
250
350
400
500
460 Volt Three Phase Class J AJT Fuses
Full
Motor
HP
Load
Amperes
at 460V
2 sec.
Recommended Fuse Ampere Rating
Motor Acceleration Times
Minimum
Typical
5 sec.
Heavy Load
Over 5 sec.
Minimum -
Minimum sizing may not be heavy enough for
motors with code letter G or higher.
Typical -
Suggested for most applications. Will coordinate
with NEMA Class 20 overload relays. Suitable for
motor acceleration times up to 5 seconds.
Heavy Load -
In accordance with Table 430-152. If this
fuse is not sufficient to start the load, it may
be increased to a maximum of 225% of full-
load amperes (430-52 Exc. 2b). Use this col-
umn for Design E Motors.
1/2
3/4
1
1-1/2
2
3
5
7-1/2
10
15
20
25
30
40
50
60
75
100
125
150
200
250
300
1.1
1.6
2.1
3
3.4
4.8
7.6
11
14
21
27
34
40
52
65
77
96
124
156
180
240
302
361
1-1/2
2
2-1/2
3-1/2
4
6
10
15
17-1/2
25
35
40
50
70
80
100
125
175
200
225
300
400
450
1-6/10
2-1/4
3-2/10
4-1/2
5
8
12
15
20
30
40
50
60
80
100
125
150
200
225
250
350
450
600
2
3
4
5-6/10
6
9
15
20
25
40
50
60
70
90
125
150
175
250
300
350
450
600
-
GPUS
5
12/04
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