JLLS250 Littelfuse Inc, JLLS250 Datasheet

JLLS250

Manufacturer Part Number
JLLS250
Description
Manufacturer
Littelfuse Inc
Type
Class Tr
Datasheet

Specifications of JLLS250

Acting
Fast
Voltage Rating (vac)
600V
Voltage Rating (vdc)
300V
Current Rating
250A
Mounting
Screw
Product Depth (mm)
Not Requiredmm
Product Height (mm)
Not Requiredmm
Lead Free Status / RoHS Status
Compliant
JLLN/JLLS POWR-T
300/600 VAC • Fast-Acting • 1 – 1200 Amperes
Space saving POWR-T fuses are the most compact fuses available in
ratings above 30 amperes — less than one-third the size of comparable
Class R fuses. When rated in accordance with the NEC
provide fast acting overload and short-circuit protection for non-inductive
circuits and equipment. Used in inductive circuits, the ampere rating of
POWR-T fuses must be increased to prevent opening on in-rush currents.
In such instances, POWR-T fuses may provide only short-circuit protection.
Specifications
Voltage Ratings:
Interrupting Ratings:
Ampere Range:
Approvals:
© 2005 Littelfuse
POWR-GARD
AC: 300 Volts (JLLN); 600 Volts (JLLS)
DC: 125 Volts (JLLN 1 – 30A)
AC: 200,000 am­peres rm­s sym­m­etrical
DC: 20,000 am­peres
AC: Standard 248-15, Class T
DC: UL Listed (File No: E81895):
Products Catalog
160 Volts (JLLN 35 – 60A)
125 Volts (JLLN 110 – 1200A)
300 Volts (JLLS)
(JLLN 110 – 1200A)
(JLLS 1 – 1200A)
1– 1200 am­peres
UL Listed (File No: E81895):
JLLN/JLLS (1 – 800A)
UL Recognized (File No: E71611):
JLLS (900 – 1200A)
CSA Certified (File No: LR29862):
JLLN/JLLS (1 – 600A)
JLLN (110 – 1200A)
Littelfuse self-certified: JLLN 1-60A
JLLS (1 – 1200A)
Class T Fuses
®
, POWR-T fuses
w w w . l i t t e l f u s e . c o m
General Purpose Fuses
Applications
Littelfuse Class T fuses can be used in applications that require fast-
acting protection, such as equipment containing variable speed drives,
rectifiers, and other surge-sensitive components. Main switches
containing Class T fuses may be used to provide protection to individual
electric services and meter stacks. Molded case circuit breaker load
centers and Panelboards also will have increased interrupting ratings
when “series rated” with Class T fuses.
Features/Benefits
Space-Saving – Switch enclosures, fuse pullouts, and other equipment
using Class T fuses are usually more compact. Typical three-pole Class
T fuse blocks require less than 50% of the panel space required by
similar Class R blocks.
Longer Equipment Life and Increased Safety – Class T fuses provide
fast, reliable protection against overcurrents up to 200,000 amperes.
Extremely current-limiting design minimizes the damaging heating and
magnetic effects caused by short-circuit currents.
Optional Mounting Types – In addition to the Class T dimensions,
Littelfuse offers select ratings with PC board mounting tabs for specialty
applications. PC board mount versions are UL Recognized. Contact the
factory for more information.
NOTE: JLLN Class T 300 volt fuses are UL Listed for circuits not
exceeding 300 volts to ground. However, since UL does not include
testing 300 volt Class T fuses on 277/480 volt three-phase bolted faults,
Littelfuse does not recommend using 300 volt Class T fuses where
phase-to-phase voltage exceeds 300 volts.
Ampere Ratings
* JLLS only
Exam­ple part num­ber (series & am­perage): JLLS 100
Recommended Fuse Blocks
LT300 series (for JLLN series fuses)
LT600 series (for JLLS series fuses)
LSCR002 (for JLLN/JLLS 700-1200A fuses)
Refer to the Blocks and Holders section of this catalog for additional inform­ation.
20
25
10
15
1
2
3
6
30
35
40
45
50
60
70
80
100
150
200
225
110
125
175
90
250
300
350
400
450
500
600
700
900*
1000
1100
1200
800
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JLLS250 Summary of contents

Page 1

... PC board mount versions are UL Recognized. Contact the factory for more information. , POWR-T fuses NOTE: JLLN Class T 300 volt fuses are UL Listed for circuits not ® exceeding 300 volts to ground. However, since UL does not include testing 300 volt Class T fuses on 277/480 volt three-phase bolted faults, Littelfuse does not recommend using 300 volt Class T fuses where phase-to-phase voltage exceeds 300 volts ...

Page 2

... JLLS JLLN 450 – 600 3 JLLS JLLN 700 – 800 3 JLLS JLLN 900 – 1200 3 JLLS Current-Limiting Effects of JLLN (300V) fuses Short Apparent RMS Symmetrical Current for Various fuse ratings Circuit 30A 60A 100A 200A Current* 5,000 700 775 1,100 1,650 ...

Page 3

... AVAILABLE FAULT CURRENT SYMMETRICAL AMPERES © 2005 Littelfuse POWR-GARD Products Catalog ™ • General Purpose Fuses JLLS 1000 800 600 400 300 200 100 ...

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