Special Purpose Fuses
LA70QS Semiconductor Fuses
700 VAC • Very Fast Acting • 35 – 800 Amperes
Littelfuse LA70QS semiconductor fuses were developed to provide
improved performance required by today’s new equipment. The
LA70QS features lower I
2
t, improved cycling, and lower watts loss. It is
the best choice for the protection of dynamic solid-state equipment.
Features
•
•
•
•
•
Very low I
2
t improved protection of equipment.
Superior cycling ability for long, reliable life on high cycling loading.
Lower watts loss for cooler operation.
700 Volt AC/DC rating provides greater design versatility.
Compact sizes allow downsizing of equipment.
Applications
Protection of 700 volt or less solid state equipment such as motor
drives, UPS, inverters, etc.
Ordering Information
LA 70 QS 150 -4
Littelfuse
Voltage
(300)
Special Purpose Fuses
Style
Ampere Rating
Mounting Type
Blades/Bolt-in
Specifications
Voltage Rating:
Interrupting Rating:
Ampere Range:
Approvals:
AC: 700 Volts
DC: 700 Volts
AC: 200,000 Amperes
DC: 100,000 Amperes
35 – 800 Amperes
UL Recognized under the components program.
CSA Certified.
96
www.littelfuse.com
© 2005 Littelfuse
•
POWR-GARD
™
Products Catalog
Special Purpose Fuses
LA70QS Semiconductor Fuses
700 VAC • Very Fast Acting • 35 – 800 Amperes
Catalog Numbers & Technical Data
Ampere
Rating
35
40
50
60
70
80
90
100
125
125
150
150
175
175
Littelfuse
Catalog
Number
LA70QS35-4
LA70QS40-4
LA70QS50-4
LA70QS60-4
LA70QS70-4
LA70QS80-4
LA70QS90-4
LA70QS100-4
LA70QS125-4
LA70QS125-4K
LA70QS150-4
LA70QS150-4K
LA70QS175-4
LA70QS175-4K
Maximum
Mounting
Watts Loss @
Clearing I
2
t @700
Type
Rated Current (W)
VAC (A
2
S x 10
3
)
4
4
4
4
4
4
4
4
4
4K
4
4K
4
4K
0.47
0.58
0.88
1.2
1.8
2.3
3
3.6
6.9
6.9
11
11
14
14
6.2
7.5
9.8
12
15
16
20
24
22
22
28
29
35
35
Maximum
Ampere
Littelfuse
Mounting
Watts Loss @
Clearing I
2
t @700
Rating Catalog Number Type
Rated Current (W)
VAC (A
2
S x 10
3
)
200
200
250
300
350
400
450
450
500
500
600
600
700
800
LA70QS200-4
LA70QS200-4K
LA70QS250-4
LA70QS300-4
LA70QS350-4
LA70QS400-4
LA70QS450-4
LA70QS450-4K
LA70QS500-4
LA70QS500-4K
LA70QS600-4
LA70QS600-4K
LA70QS700-4
LA70QS800-4
4
4
4
4
4
4
4
4K
4
4K
4
4K
4
4
19
19
42
55
72
99
125
125
150
160
222
222
332
433
41
41
42
53
64
75
75
75
92
92
116
116
125
143
Special Purpose Fuses
Dimensions
Amperes
35 – 100
125 – 200
125 – 200
225 – 400
450 – 600
450 – 600
700 – 800
Mount. Type
4
4
4K
4
4
4K
4
Dimensions in Inches (mm in parentheses)
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)
2.88
(73)
2.88
(73)
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)
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)
Dimensions for reference only.
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)
Contact Littelfuse for characteristic curves.
© 2005 Littelfuse
•
POWR-GARD
™
Products Catalog
www.littelfuse.com
97
