KLSR250.X Littelfuse Inc, KLSR250.X Datasheet

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KLSR250.X

Manufacturer Part Number
KLSR250.X
Description
FUSE F/A CLASS RK1 250A 600V
Manufacturer
Littelfuse Inc
Series
KLSRr
Datasheet

Specifications of KLSR250.X

Voltage - Rated
600VAC, 300VDC
Current
250A
Fuse Type
Fast Acting
Package / Case
Bolt Mount
Size / Dimension
2.594" Dia x 11.626" L (65.90mm x 295.30mm)
Mounting Type
Bolt Mount
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Color
-
Operating Temperature
-
34
KLNR/KLSR Class RK1 Fuses
250/600 VAC • Fast Acting • 1 – 600 Amperes
KLNR/KLSR series RK1 fuses were the earliest type of current-limiting
fuses developed. Their single-element, silver link design enables them
to provide fast-acting overload and short-circuit protection. When used
to protect inductive loads such as motors, solenoids, and transformers,
KLNR/KLSR series fuses must be greatly oversized to prevent opening
the fuses on harmless in-rush currents. In such applications, KLNR/
KLSR series fuses may only provide short-circuit protection.
We recommend using POWR-PRO
dual-element, time-delay fuses in all new applications requiring the
current-limiting ability of UL Class RK1 fuses. POWR-PRO LLNRK/
LLSRK series fuses are also recommended in existing applications
where fast-acting RK1 or RK5 fuses have been opening on harmless
system surges such as motor starting currents.
Specifications
Voltage Ratings:
Interrupting Ratings:
Ampere Range:
Approvals:
AC: 250 Volts (KLNR); 600 Volts (KLSR)
DC: 125 Volts (1 – 600A KLNR);
AC: 200,000 am­peres rm­s sym­m­etrical
DC: 20,000 am­peres
1 – 600 am­peres.
AC: Standard 248-12, Class RK1
DC: Littelfuse self-certified
250 Volts (1 – 30A KLSR);
300 Volts (35 – 600A KLSR).
UL Listed (File No: E81895)
CSA Certified (File No: LR29862)
®
LLNRK/LLSRK series Class RK1,
General Purpose Fuses
w w w . l i t t e l f u s e . c o m
Applications
Resistance heaters
Lighting circuits
Non-inductive loads
Molded case circuit breaker load centers and panelboards have
Safety
• 200,000 A.I.R. — Reliable interruption of all overcurrents up to
• Extremely current-limiting — Stops damaging short-circuit current
• Fast-acting — Provides fast acting protection to equipment such
Longer Equipment Life
• Current-limiting design reduces damage to equipment caused by
Economical
• Extremely current-limiting — often permits use of readily available,
• Used as input or output fuses for surge sensitive components such
Easy To Use
• 200,000 A.I.R. rating minimizes need for short-circuit calculations.
Dimensions
• Refer to FLNR_ID for KLNR dimensions and FLSR_ID for KLSR
Ampere Ratings
Exam­ple part num­ber (series & am­perage): KLNR 200
Recommended Fuse Blocks
LR250 series (for KLNR series fuses)
LR600 series (for KLSR series fuses)
Refer to the Blocks & Holders section of this catalog for additional inform­ation.
increased interrupting ratings when series rated with Littelfuse
KLNR/KLSR Class RK1 fuses. Refer to panelboard manufacturer’s
literature for UL Listed combination of fuses and panelboards. Series
ratings up to 200,000 amperes are available.
200,000 amperes.
faster than any mechanical protective device.
as variable speed drives, rectifiers and other equipment containing
surge-sensitive components.
heating and magnetic effects of short-circuit currents.
less costly equipment.
as variable speed drives and rectifiers, fast acting KLNR/KLSR fuses
may prevent opening of expensive semiconductor fuses protecting
individual components.
dimensions.
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5
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8
20
25
30
35
10
12
15
© 2005 Littelfuse
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POWR-GARD
100
125
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175
200
225
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Products Catalog
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Related parts for KLSR250.X

KLSR250.X Summary of contents

Page 1

... Economical • Extremely current-limiting — often permits use of readily available, less costly equipment. • Used as input or output fuses for surge sensitive components such as variable speed drives and rectifiers, fast acting KLNR/KLSR fuses may prevent opening of expensive semiconductor fuses protecting individual components. ...

Page 2

... KLNR/KLSR Class RK1 Fuses 250/600 VAC • Fast Acting • 1 – 600 Amperes KLNR 1000 800 600 400 300 200 100 .08 .06 .04 .03 .02 .01 CURRENT IN AMPERES 548001 KLNR 1000000 800000 600000 400000 300000 200000 100000 80000 60000 40000 30000 20000 10000 ...

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