Semiconductor (A) fuses
Semiconductor (AC) fuses
American Round Fuses
Form 101 Range
A70QS
Semiconductor Protection Fuses
A70QS Amp-trap
®
Semiconductor Protection fuses were
developed in response to the need for improved overall
performance of 700 volt semiconductor fuses for new
equipment requirements. A70QS fuses have lower I
2
t for
better protection, longer life when subjected to cyclic
loading, plus lower watts loss. A70QS is the best choice
to protect dynamic solid state equipment
such as motor drives, UPS, etc.
Features/Benefits
• Very Low l
2
t for improved protection of equipment
• Superior cycling ability for long,reliable life
on high cyclic loading
• Low watts loss for cooler operation
• 700V AC/DC rating gives greater design versatility
• Ultra compact sizes allow down-sizing
of existing equipment
Ratings
• AC: 35-800A
700VAC, 200kA I.R.
• DC: 35-800A
700VDC, 100kA I.R.
L/R = 10ms
Approvals
• UL Recognized
Component AC/DC
• AC: GuideNo.JFHR2
• DC: Tested to UL
Standard 198L
Parameters (35-800A)
• CSA Certified
File LR 12636
Highlights
•
•
•
•
700V AC/DC Rated
Very low l
2
t
Low Watts Loss
Superior Cycling
Ability
Applications
• Protection of 700V
less motor drives,
UPS, inverters, etc.
Catalog Numbering System
A
70
QS 150 - 4
Amp-trap
®
Fuse
Rated Volts - 700
Style
Amperes*
Mounting Types*
Blades, bolt-in.
A
70
QS
150
4,4K
Single Pole Fuse Blocks
for A70QS Fuses
Fuse
Ampere
Rating
Fuse block
Catalog
Number
Reference
Number
* for ampere ratings and types not listed, consult the factory.
35-200
225-600
700-800
P243C
P266A
15C 375
M219040
Y212380
SCAC
24
12/04
Semiconductor (A) fuses
Semiconductor (AC) fuses
American Round Fuses
Form 101 Range
A70QS
Semiconductor Protection Fuses
Standard Fuse Ampere Ratings, Catalog and ReferenceNumbers
Ampere
Rating
35
40
50
60
70
80
90
Catalog
Number
A7OQS35-4
A7OQS40-4
A7OQS50-4
A7OQS60-4
A7OQS70-4
A7OQS80-4
A7OQS90-4
Ref.
Ampere
Number Rating
D202748
Y213829
T217919
H219473
B201527
X212816
K214346
100
125
125
150
150
175
175
Catalog
Number
A7OQS100-4
A7OQS125-4
A7OQS125-4K
A7OQS150-4
A7OQS150-4K
A7OQS175-4
A7OQS175-4K
Ref.
Ampere
Number Rating
G214343
L215865
Q216375
P218950
F219471
A223192
J200982
200
200
250
300
350
400
450
Catalog
Number
A7OQS200-4
A7OQS200-4K
A7OQS250-4
A7OQS300-4
A7OQS350-4
A7OQS400-4
A7OQS450-4
Ref.
Ampere
Number Rating
V212814
E213329
L217406
Q218951
M211266
J214345
F214848
450
500
500
600
600
700
800
Catalog
Number
A7OQS450-4K
A7OQS500-4
A70QS500-4K
A7OQS600-4
A7OQS600-4K
A7OQS700-4
A7OQS800-4
Ref.
Number
H215356
A218431
R218952
Y219993
P222676
E202772
Z213830
For ampere ratings and styles not listed, ask sales agent. Mounting Type 4; note exception 4k
Dimensions
Catalog
Number
A70QS35 to 100
A70QS125 to 200
A70QS125 to 200
A70QS225 to 400
A70QS450 to 600
A70QS450 to 600
A70QS700 to 800
Mounting
Type
4
4
4K
4
4
4K
4
Dimensions - Inches (mm)
A
4.38
(111)
4.38
(111)
5.09
(129)
5.09
(129)
5.09
(129)
7.09
(180)
7.09
(180)
B
1.00
(25.4)
1.22
(31.0)
1.22
(31.0)
1.50
(38.1)
2.00
(50.8)
2.00
(50.8)
2.50
(63.5)
C
2.88
(73.0)
2.88
(73.0)
2.88
(73.0)
2.84
(72.2)
2.84
(72.2)
2.84
(72.2)
2.84
(72.2)
D
3.69
(93.6)
3.69
(93.6)
4.19
(106)
4.16
(106)
4.16
(106)
6.16
(156)
5.28
(134)
E
3.50
(88.9)
3.56
(90.5)
3.50
(88.0)
3.53
(89.7)
3.53
(89.7)
3.53
(89.7)
4.91
(125)
F
0.31
(7.9)
0.31
(7.9)
0.41
(10.3)
0.40
(10.3)
0.41
(10.3)
0.53
(13.5)
0.53
(13.5)
G
0.75
(19.0)
1.00
(25.4)
1.00
(25.4)
1.50
(38.1)
1.50
(38.1)
1.50
(38.1)
2.00
(50.8)
H
0.13
(3.2)
0.19
(4.8)
0.19
(4.8)
0.25
(6.4)
0.25
(6.4)
0.25
(6.4)
0.38
(9.5)
I
2
t Data – 700 Volts
AC, 100kA
Fuse
Ampere
Rating
35
40
50
60
70
80
90
100
125
150
175
200
225
250
300
350
400
450
500
600
700
800
Melting
x 10
3
A
2
s
0.13
0.16
0.24
0.32
0.50
0.65
0.83
1.0
2.1
3.3
4.2
5.9
9.0
12.6
16.7
21.5
29.7
36.7
47.1
65.2
103.6
135.3
I
2
t data
clearing at 700V AC
1 Fuse
2 Fuses
(Fig. A)
in series(Fig. B)
x 10
3
A
2
s
x 10
3
A
2
s
0.47
0.27
0.58
0.33
0.86
0.49
1.2
0.69
1.8
1.0
2.3
1.3
3.0
1.7
3.6
2.1
6.9
4.0
11
6.3
14
8.0
19
11
30
17
42
24
55
32
72
41
99
57
125
72
160
92
222
127
332
190
433
248
700 VAC
Fault
Load
700 VAC
Fault
Load
Fig. A
Fig. B
Clearing I
2
t vs. AC Operating Voltage
CORRECTION FACTOR FOR I2T
OPERATING VOLTAGE (AC RMS VOLTS)
12/04
SCAC
25
Semiconductor (A) fuses
Semiconductor (AC) fuses
American Round Fuses
Form 101 Range
A70QS
Semiconductor Protection Fuses
A70QS35 to 800
Melting Time – Current Data, 700V Fuses
TIME IN SECONDS
CURRENT IN AMPERES
Peak Let-Thru Current Data – A70QS35 to 800, 700 Volts AC
MAXIMUM INSTANTANEOUS PEAK LET-THRU AMPERES
AVAILABLE CURRENT IN RMS SYMMETRICAL AMPERES
SCAC
26
12/04
Semiconductor (A) fuses
Semiconductor (AC) fuses
American Round Fuses
Form 101 Range
A70QS
Semiconductor Protection Fuses
Clearing I
2
t at 700V DC,
100kA, L/R = 10 ms
Ampere
Rating
Clearing I
2
t
(A
2
s x 10
3
)
Maximum Arc Volts vs. System Voltage
35
40
50
70
80
90
100
125
150
175
200
225
250
300
350
400
450
500
600
700
800
0.25
0.35
0.60
1.3
1.8
2.4
3.1
5.3
8.1
12
16
21.5
27.5
42
63
85
115
150
201
325
450
MAXIMUM PEAK ARC VOLTS
CIRCUIT VOLTAGE (VOLTS RMS)
Watts Loss at Rated Current
Ampere
Rating
35
40
50
60
70
80
90
100
125
150
175
Watts
Loss (W)
6.2
7.5
9.8
12
15
18
20
24
22
29
35
Ampere
Rating
200
225
250
300
350
400
450
500
600
700
800
Watts
Loss (W)
41
37
42
53
64
75
78
92
116
125
143
DC Voltage Capability vs. Time Constant
CORRECTION FACTOR FOR WATTS LOSS
Watts Loss vs. % Rated Current
DC VOLTAGE CAPABILITY
L/R TIME CONSTANT (MS)
12/04
SCAC
27
PERCENT RATED CURRENT
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