POWR-GARD
®
Fuse Datasheet
L50S SERIES HIGH-SPEED FUSE
500 Vac • 450 Vdc • 10-800 A • Traditional Round Body Style
Specifications
Voltage Rating
Amperage Rating
500 Vac
450 Vdc
10, 12, 15, 20, 25, 30, 35, 40, 50, 60,
70, 80, 90, 100, 125, 150, 175, 200, 225,
250, 275, 300, 350, 400, 450, 500, 550,
600, 700, 800
AC: 200 kAIC
DC: 20 kAIC
Body: Melamine
Terminals: Copper (silver plated)
Cylindrical (10 - 30 A)
Bolted Tags (35 - 800 A)
-55˚ C to +125˚ C
Up to 35˚ C with relative humidity less than 65%
UL Recognized (File: E71611)
CSA Recognized (File: LR29862)
RoHS Compliant
Mexico
Interrupting Rating
Material
Mounting Type
Operating Temperature
Storage Temperature
Approvals
Environmental
Country of Origin
Description
Littelfuse L50S Series High-Speed Fuses are designed
to protect today’s equipment and systems, and are
manufactured with Littelfuse-developed technology that
sets tomorrow’s standards for accuracy, consistent quality,
reliability, and predictable performance.
Littelfuse engineers have redefined High-Speed Fuse
Technology by using advanced metallurgical, polymer,
and materials research, mathematical modeling, and
computerized statistical analysis.
Part Numbering System
L50S xxx .T
Series
Amp Code
Package Quantity
Features/Benefits
•
•
•
•
•
•
•
•
•
Extremely Current Limiting
Low Watt Losses
Controlled Transient Over-voltages
UL Recognized
AC & DC Drives
DC Common Bus Protection
Power Converters
UPS
Soft-Starters
Refer to Amp Code
Column in Ordering
Information Table
SERIES
L50S
L50S
AMP
10
500
Refer to Pack Qty.
Column in Ordering
Information Table
ORDERING NUMBER
L50S010.T
L50S500.X
CATALOG NUMBER
L50S010
L50S500
Applications
Recommended Fuse Holder
LSCR001 (35-200 A)
LSCR002 (225-800 A)
Web Resources
Download technical documents:
littelfuse.com/L50S
littelfuse.com
1 of 7
© 2015 Littelfuse POWR-GARD
®
Products
Rev: 082615
POWR-GARD
®
Fuse Datasheet
L50S SERIES HIGH-SPEED FUSE
Recommended Torque Values For Bus Bar Mounting
RECOMMENDED TORQUE VALUES FOR BUS BAR MOUNTING FUSE
CATALOG NUMBER
L50S035
L50S040
L50S050
L50S060
L50S070
L50S080
L50S090
L50S100
L50S125
L50S150
L50S175
L50S200
L50S225
L50S250
L50S275
L50S300
L50S350
L50S400
L50S450
L50S500
L50S550
L50S600
L50S700
L50S800
FUSE TORQUE–METRIC (STANDARD)
15 N m (132.76 in-lb)
15 N m (132.76 in-lb)
15 N m (132.76 in-lb)
15 N m (132.76 in-lb)
15 N m (132.76 in-lb)
15 N m (132.76 in-lb)
15 N m (132.76 in-lb)
15 N m (132.76 in-lb)
8 N m (70.81 in-lb)
8 N m (70.81 in-lb)
8 N m (70.81 in-lb)
8 N m (70.81 in-lb)
15 N m (132.76 in-lb)
15 N m (132.76 in-lb)
15 N m (132.76 in-lb)
15 N m (132.76 in-lb)
15 N m (132.76 in-lb)
15 N m (132.76 in-lb)
15 N m (132.76 in-lb)
15 N m (132.76 in-lb)
15 N m (132.76 in-lb)
15 N m (132.76 in-lb)
54 N m (477.94 in-lb)
54 N m (477.94 in-lb)
HARDWARE SIZE–METRIC (STANDARD)
M8 (5/16")
M8 (5/16")
M8 (5/16")
M8 (5/16")
M8 (5/16")
M8 (5/16")
M8 (5/16")
M8 (5/16")
M6 (1/4")
M6 (1/4")
M6 (1/4")
M6 (1/4")
M8 (5/16")
M8 (5/16")
M8 (5/16")
M8 (5/16")
M8 (5/16")
M8 (5/16")
M8 (5/16")
M8 (5/16")
M8 (5/16")
M8 (5/16")
M12 (1/2")
M12 (1/2")
Temperature De-rating Curve (Temperature of Air Immediately Surrounding Fuse)
PERCENT OF UPRATING
60
40
20
0
0
PERCENT OF DOWNRATING
20
40
60
-60˚ C
-76˚ F
-40˚ C
-40˚ F
-20˚ C
-4˚ F
0˚ C
-32˚ F
20˚ C
68˚ F
40˚ C
104˚ F
60˚ C
140˚ F
80˚ C
176˚ F
100˚ C
212˚ F
120˚ C
248˚ F
140˚ C
284˚ F
AMBIENT TEMPERATURE
littelfuse.com
4 of 7
© 2015 Littelfuse POWR-GARD
®
Products
Rev: 082615
POWR-GARD
®
Fuse Datasheet
L50S SERIES HIGH-SPEED FUSE
Time Current Curves
40000
50000
60000
70000
80000
90000
100000
4000
5000
6000
7000
8000
9000
10000
20000
30000
100
90
80
70
60
50
40
30
20
100
90
80
70
60
50
40
30
20
100
90
80
70
60
50
40
30
20
40000
50000
60000
70000
80000
90000
100000
100
90
80
70
60
50
40
30
20
10
9
8
7
6
5
4
3
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
0.01
0.009
0.008
0.007
0.006
0.005
0.004
0.003
0.002
0.001
0.0009
0.0008
0.0007
0.0006
0.0005
0.0004
0.0003
0 0003
0.0002
0.0001
4000
5000
6000
7000
8000
9000
10000
20000
30000
40000
50000
60000
70000
80000
90000
100000
400
500
600
700
800
900
1000
2000
3000
4
5
6
7
8
9
10
20
30
40
50
60
70
80
90
100
200
300
1
2
3
400
500
600
700
800
900
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
20000
10
9
8
7
6
5
4
3
2
10
9
8
7
6
5
4
3
2
10
9
8
7
6
5
4
3
2
Melting (Pre‐arcing) Time in Seconds
Melting (Pre‐arcing) Time in Seconds
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
- 30A
- 25A
- 20A
- 15A
- 12A
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
1
0.9
0.8
0.7
0.6
0.5
0.4
04
0.3
0.2
- 60A
- 50A
- 40A
- 35A
- 10A
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0 04
0.03
0.02
0.1
0.09
0.08
0.07
0.06
0.05
0.04
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
0.01
0.009
0.008
0.007
0.006
0.005
0.004
0.003
0.002
0.0010
0.0009
0.0008
0.0007
0.0006
0.0005
0.0004
0.0003
0.0002
0.0010
0.0009
0.0008
0.0007
0.0006
0.0005
0.0004
0.0003
0.0002
0.001
0.0009
0.0008
0.0007
0.0006
0.0005
0.0004
0.0003
0 0003
0.0002
0.0001
4000
5000
6000
7000
8000
9000
10000
20000
30000
40000
50000
60000
70000
80000
90000
100000
1
2
3
4
5
6
7
8
9
10
20
30
40
50
60
70
80
90
100
200
300
400
500
600
700
800
900
1000
2000
3000
0.0001
0.0001
Prospective R.M.S Current in Ampere
TEST VOLTAGE:
BASIS FOR DATA:
500V
TIME CONSTANT/POWER FACTOR:
FUSE CATALOG NUMBER:
TEST VOLTAGE:
BASIS FOR DATA:
500V
Prospective R.M.S Current in Ampere
TIME CONSTANT/POWER FACTOR:
FUSE CATALOG NUMBER:
L50S 10A - 800A
L50S 10A - 800A
LITTELFUSE, INC.
CHICAGO, IL. USA
2000
6000
7000
8000
9000
10000
600
700
800
900
1000
3000
4000
5000
100
200
300
400
500
60000
70000
80000
90000
100000
60000
70000
80000
90000
100000
200000
20000
30000
40000
50000
TIME CURRENT CHARACTERISTIC CURVES
100
200
300
400
500
DRAWING NO.:
FCC01 L50S
FCC01-L50S
SHEET 2 OF 5
TIME CURRENT CHARACTERISTIC CURVES
600
700
800
900
1000
2000
3000
4000
5000
DRAWING NO.:
100
90
80
70
60
50
40
30
20
- THIS DATA IS GENERATED IN EXCEL -
100
90
80
70
60
50
40
30
20
100
90
80
FCC01 L50S
FCC01-L50S
SHEET 3 OF 5
200000
100
90
80
70
60
50
40
30
20
10
9
8
7
6
5
4
3
2
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0.009
0.008
0.007
0.006
0.005
0.004
0 003
0.003
0.002
0.001
0.0009
0.0008
0.0007
0.0006
0.0005
0.0004
0.0003
0.0002
0.0001
6000
7000
8000
9000
10000
20000
30000
40000
70
60
50
40
30
20
- THIS DATA IS GENERATED IN EXCEL -
- 800A
- 700A
10
9
8
- 600A
- 500A
- 450A
7
6
5
4
3
2
10
9
8
7
6
5
4
3
10
9
8
- 400A
- 350A
- 300A
- 275A
- 250A
- 225A
- 100A
- 90A
- 80A
- 70A
7
6
5
4
3
2
- 200A
- 175A
- 150A
- 125A
2
Melting (P
Pre‐arcing) Time in Seco
onds
Melting (Pre‐arcing) Time in Seconds
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
1
0.9
0.8
0.7
0.6
0.5
0.4
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
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0.009
0.008
0.007
0.006
0.005
0.004
0.003
0 003
0.002
0.01
0.009
0.008
0.007
0.006
0.005
0.004
0.003
0 003
0.002
0.01
0.009
0.008
0.007
0.006
0.005
0.004
0 003
0.003
0.002
0.001
0.0009
0.0008
0.0007
0.0006
0.0005
0.0004
0.0003
0.0002
0.001
0.0009
0.0008
0.0007
0.0006
0.0005
0.0004
0.0003
0.0002
0.001
0.0009
0.0008
0.0007
0.0006
0.0005
0.0004
0.0003
0.0002
0.0001
600
700
800
900
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
20000
30000
40000
50000
60000
70000
80000
90000
100000
200000
100
200
300
400
500
0.0001
0.0001
100
200
300
400
500
600
700
800
900
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
20000
30000
40000
50000
50000
DRAWN BY:
LLL
DATE:
1/28/2015
REVISION:
A
LITTELFUSE, INC.
CHICAGO, IL. USA
DRAWN BY:
LLL
DATE:
1/28/2015
REVISION:
A
60000
70000
80000
90000
100000
30000
40
50
60
70
80
90
100
200
300
400
500
600
700
800
900
1000
2000
3000
4
5
6
7
8
9
10
20
30
40
50
60
70
80
90
100
200
300
1
2
3
4
5
6
7
8
9
10
20
30
1
2
3
Prospective R.M.S Current in Ampere
TEST VOLTAGE:
BASIS FOR DATA:
500V
TIME CONSTANT/POWER FACTOR:
FUSE CATALOG NUMBER:
Prospective R.M.S Current in Ampere
TEST VOLTAGE:
BASIS FOR DATA:
500V
TIME CONSTANT/POWER FACTOR:
FUSE CATALOG NUMBER:
L50S 10A - 800A
L50S 10A - 800A
littelfuse.com
LITTELFUSE, INC.
CHICAGO, IL. USA
DRAWN BY:
LLL
DATE:
1/28/2015
REVISION:
A
DRAWING NO.:
5 of 7
SHEET 4 OF 5
LITTELFUSE, INC.
CHICAGO, IL. USA
TIME CURRENT CHARACTERISTIC CURVES
FCC01 L50S
FCC01-L50S
TIME CURRENT CHARACTERISTIC CURVES
CU
C
C
S C CU
S
© 2015 Littelfuse POWR-GARD
®
Products
DRAWING NO.:
DRAWN BY:
LLL
DATE:
1/28/2015
REVISION:
A
FCC01 L50S
FCC01-L50S
SHEET 5 OF 5
Rev: 082615
- THIS DATA IS GENERATED IN EXCEL -
- THIS DATA IS GENERATED IN EXCEL -
200000
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