LITTELFUSE LA70QS450-4

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 I2t, improved cycling, and lower watts loss. It is
the best choice for the protection of dynamic solid-state equipment.
Features
•
•
•
•
•
Very low I2t 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
Special Purpose Fuses
(300)
Style
Ampere Rating
Mounting Type
Blades/Bolt-in
Specifications
Voltage Rating: Interrupting Rating:
Ampere Range:
Approvals: 96
www.littelfuse.com
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.
© 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
Littelfuse
Catalog
Number
35
40
50
60
70
80
90
100
125
125
150
150
175
175
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 I2 t @700
Type
Rated Current (W)
VAC (A 2S 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 I2 t @700
Rating Catalog Number Type
Rated Current (W)
VAC (A 2S 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
Dimensions for reference only.
Amperes
Mount. Type
35 – 100
4
125 – 200
4
125 – 200
4K
225 – 400
4
450 – 600
4
450 – 600
4K
700 – 800
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)
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