POWR-SPEED
™
Fuse Datasheet
L50QS SERIES HIGH-SPEED ROUND BODY FUSES
500 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: 500V
DC: 500V
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 L50QS 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.
L50QS 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 L50QS 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
L50
Series
Body Type
Ampere Code
Package Quantity
X = 1 (450 - 800A)
V = 5 (125 - 400A)
T = 10 (35 - 100A)
QS
500 X
SERIES
L50
BODY AMPERE
TYPE
CODE
QS
500
PACKAGE
QUANTITY
1
CATALOG
NUMBER
L50QS500
ORDERING NUMBER
L50QS500.X
Recommended Fuse Blocks
LSCR001 (35-200A)
LSCR002 (225-800A)
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/L50QS
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© 2017 Littelfuse POWR-GARD
®
Products
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