POWR-SPEED
™
Fuse Datasheet
L70QS SERIES HIGH-SPEED ROUND BODY FUSES
700 Vac/dc • 35-800 A • Traditional Round Body Bolted Style
Specifications
Voltage Rating
Amperage Rating
Interrupting Rating
Time Constant
Material
Approvals
Environmental
Country of Origin
Operating Temperature
Storage Temperature
AC: 700V
DC: 700V
35 - 800 A
AC: 200 kA
DC: 50 kA
10ms
Body: Melamine
Caps: Copper Alloy (Silver Plated)
UL Recognized (E71611)
c-UR-us (E71611)
RoHS Compliant, REACH
Mexico
-55C to +125C
Up to 35C with Relative Humidity <65%
HF
Description
The L70QS Series is a next generation High-Speed Fuse
for the protection of power semiconductor devices and is
designed in the Traditional North American Bolted Style
package.
L70QS Series High-Speed Fuses are extremely current
limiting and are used to protect power converters, drives
and control circuit applications. Designed with lower I
2
t
performance characteristics, these fuses provide balanced
performance to extend longevity while lowering potentially
damaging heat energy to the devices being protected.
In addition L70QS Series fuses have been designed with a
universal mounting option to meet customer requirements
for installation into a variety of application configurations
Littelfuse POWR-SPEED™ products offer optimized
circuit protection at the extremely fast speed required to
protect modern day, sensitive, high-power semiconductor
devices. Such products are commonly found in various
industries including pulp and paper industries, cranes and
heavy-lifting equipment, processing industries, wastewater
treatment plants and large factories and MRO facilities.
Part Numbering System
L70
Series
Body Type
Ampere Code
Package Quantity
X = 1 (225 - 800A)
V = 5 (35 - 200A)
QS
700 X
SERIES
L70
BODY AMPERE
TYPE
CODE
QS
700
PACKAGE
QUANTITY
1
CATALOG
NUMBER
L70QS700
ORDERING NUMBER
L70QS700.X
Recommended Fuse Blocks
LSCR001 (35-100A)
LSCR002 (125-800A)
Features
•
•
•
•
Compliance with US and Canadian Requirements
Traditional North American Bolted Style dimensions
Class aR performance
Direct bus-bar mount or stud mount design
• Halogen Free, RoHS and REACH Compliant
Applications
•
•
•
•
Power Converters (Inverters, Rectifiers)
Power Supplies
UPS
Variable Speed Drives
• Control Circuits
• Soft Starters
littelfuse.com
Web Resources
Download technical documents:
littelfuse.com/L70QS
1 of 11
© 2017 Littelfuse POWR-GARD
®
Products
Rev: 110317
POWR-SPEED
™
Fuse Datasheet
L70QS SERIES HIGH-SPEED ROUND BODY FUSES
Time Current Curve
L70QS Series
40000
50000
60000
70000
80000
90000
100000
4000
5000
6000
7000
8000
9000
10000
20000
30000
400
500
600
700
800
900
1000
2000
100
90
80
70
60
50
40
30
20
3000
40
50
60
70
80
90
100
200
300
4
5
6
7
8
9
10
20
30
1
2
3
100
90
80
70
60
50
40
30
20
10
9
8
7
6
5
4
3
2
- 60A
- 50A
- 40A
- 35A
10
9
8
7
6
5
4
3
2
MELTING (PRE‐ARCING) TIME IN SEC
CONDS
1
0.9
0.8
0.7
0.6
0.5
0.4
04
0.3
0.2
1
0.9
0.8
0.7
0.6
0.5
0.4
04
0.3
0.2
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0.0090
0.0080
0.0070
0.0060
0.0050
0.0040
0.0030
0.0020
0.01
0.0090
0.0080
0.0070
0.0060
0.0050
0.0040
0.0030
0.0020
0.0010
0.0009
0.0008
0.0007
0.0006
0.0005
0.0004
0.0003
0 0003
0.0002
0.0010
0.0009
0.0008
0.0007
0.0006
0.0005
0.0004
0.0003
0 0003
0.0002
0.0001
10
9
8
7
6
5
4
20
30
100
90
80
70
60
50
40
200
300
1000
900
800
700
600
500
400
2000
3000
10000
9000
8000
7000
6000
5000
4000
20000
30000
100000
90000
80000
70000
60000
50000
40000
1
2
3
0.0001
PROSPECTIVE R.M.S CURRENT IN AMPERE
TEST VOLTAGE:
BASIS FOR DATA:
700V
TIME CONSTANT/POWER FACTOR:
FUSE CATALOG NUMBER:
L70QS 35A - 800A
littelfuse.com
LITTELFUSE, INC.
CHICAGO, IL. USA
4 of 11
DRAWN BY:
LLL
DATE:
10/15/2015
REVISION:
A
DRAWING NO.:
© 2017 Littelfuse POWR-GARD
®
Products
SHEET 2 OF 4
Rev: 110317
TIME CURRENT CHARACTERISTIC CURVES
FCC01 L70QS
FCC01-L70QS
POWR-SPEED
™
Fuse Datasheet
L70QS SERIES HIGH-SPEED ROUND BODY FUSES
Time Current Curve
L70QS Series
100000
90000
80000
70000
60000
200000
10000
9000
8000
7000
6000
20000
30000
40000
50000
1000
900
800
700
600
2000
3000
4000
5000
100
200
300
400
500
100
90
80
70
60
50
40
30
20
100
90
80
70
60
50
40
30
20
10
9
8
7
6
5
4
3
2
- 600A
- 500A
- 450A
10
9
8
7
6
5
4
3
2
MELTING (PRE‐ARCING) TIME IN SEC
CONDS
1
0.9
0.8
0.7
0.6
0.5
0.4
04
0.3
0.2
- 200A
- 175A
- 150A
- 125A
1
0.9
0.8
0.7
0.6
0.5
0.4
04
0.3
0.2
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0.0090
0.0080
0.0070
0.0060
0.0050
0.0040
0.0030
0.0020
0.01
0.0090
0.0080
0.0070
0.0060
0.0050
0.0040
0.0030
0.0020
0.0010
0.0009
0.0008
0.0007
0.0006
0.0005
0.0004
0.0003
0 0003
0.0002
0.0010
0.0009
0.0008
0.0007
0.0006
0.0005
0.0004
0.0003
0 0003
0.0002
0.0001
100
200
300
400
500
1000
900
800
700
600
2000
3000
4000
5000
10000
9000
8000
7000
6000
20000
30000
40000
50000
100000
90000
80000
70000
60000
200000
0.0001
PROSPECTIVE R.M.S CURRENT IN AMPERE
TEST VOLTAGE:
BASIS FOR DATA:
700V
TIME CONSTANT/POWER FACTOR:
FUSE CATALOG NUMBER:
L70QS 10A - 800A
LITTELFUSE, INC.
littelfuse.com
CHICAGO, IL. USA
5 of 11
DRAWN BY:
LLL
DATE:
10/15/2015
REVISION:
A
DRAWING NO.:
© 2017 Littelfuse POWR-GARD
®
Products
SHEET 3 OF 4
TIME CURRENT CHARACTERISTIC CURVES
FCC01 L70QS
FCC01-L70QS
Rev: 110317
PCB Design
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