LSRK.250T Littelfuse Inc, LSRK.250T Datasheet
LSRK.250T
Manufacturer Part Number
LSRK.250T
Description
FUSE 600V T/D CLASS RK1 .250A
Manufacturer
Littelfuse Inc
Series
POWR-PRO® LLSRKr
Datasheet
1.LSRK020.T.pdf
(3 pages)
Specifications of LSRK.250T
Fuse Type
Slow Blow, Time Lag
Voltage - Rated
600VAC, 300VDC
Current
250mA
Package / Case
Cylindrical
Size / Dimension
0.811" Dia x 5.000" L (20.60mm x 127.00mm)
Mounting Type
Holder
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Operating Temperature
-
Color
-
Other names
LLSRK.250T
LLNRK/LLSRK Series POWR-PRO
250/600 VAC • Dual-Element, Time-Delay • 1/10 – 600 Amperes
Specifications
Voltage Ratings:
Interrupting Ratings:
Ampere Range:
Approvals:
AC: 250 Volts (LLNRK)
DC: 125 Volts (LLNRK)
AC: 200,000 amperes rms symmetrical
DC: 20,000 amperes
1/10 – 600 amperes
AC: Standard 248-12, Class RK1
QPL: Federal Specification No. WF-1814
DC: Littelfuse self-certified
600 Volts (LLSRK)
300 Volts (LLSRK)
300,000 amperes rms symmetrical
(Littelfuse self-certified)
UL Listed (File No: E81895)
CSA Certified (File No: LR29862)
POWR-PRO
w w w . l i t t e l f u s e . c o m
®
Fuses
®
Class RK1 Fuses
Littelfuse LLNRK and LLSRK series POWR-PRO fuses provide superior
overload and short-circuit protection for service entrance, main, feeder
and general-purpose branch circuits up to 600 amperes.
LLNRK/LLSRK series fuses can be installed in existing Class H fuse
blocks to upgrade systems containing lower interrupting rating Class H
one-time or renewable fuses.
Applications
All general purpose circuits
Motors
Transformers
Solenoids
Fluorescent lighting
All system components with high in-rush currents
Features/Benefits
• Extremely current-limiting — Reduces damage to circuits and
• 300kA Interrupting Rating — Littelfuse self-certified to 300,000
• Reduced costs — Current-limiting design often permits use of readily
• Excellent time-delay — True dual-element construction, with separate
Ampere Ratings
* LLSRK Only.
Example part number (series & amperage): LLNRK 450.
For online ordering, use numbers LNRK and LSRK for LLNRK/LLSRK.
Recommended Fuse Blocks
LR250 series (LLNRK Series)
LR600 series (LLSRK Series)
Refer to the Blocks & Holders section of this catalog for additional information.
equipment under short-circuit conditions. Stops damaging short-
circuits faster than any mechanical protective device.
amperes as standard. Meets future trend towards higher available
short-circuit currents.
available, less costly equipment. Low resistance design reduces
power consumption and utility bills.
non-fatiguing thermally-reversible spring-loaded thermal overload
element, withstands repeated surges within rated time delay without
opening needlessly. Eliminates needless downtime caused by power
surges or equipment demands.
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Products Catalog
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LSRK.250T Summary of contents
Page 1
... Littelfuse LLNRK and LLSRK series POWR-PRO fuses provide superior overload and short-circuit protection for service entrance, main, feeder and general-purpose branch circuits up to 600 amperes. LLNRK/LLSRK series fuses can be installed in existing Class H fuse blocks to upgrade systems containing lower interrupting rating Class H one-time or renewable fuses. ...
Page 2
... CURRENT IN AMPERES 568003 © 2005 Littelfuse POWR-GARD Products Catalog ™ • POWR-PRO Class RK1 Fuses ® Dimensions in Inches (mm in parentheses ⁄ (12.7) 1 ⁄ (12.7) 9 ⁄ (14.3) 5 ⁄ (2. ⁄ ⁄ ⁄ ⁄ (19.1) 5 (15.9) 3 (20. ...
Page 3
... AVAILABLE FAULT CURRENT SYMMETRICAL AMPERES 05568003 POWR-PRO Fuses ® Class RK1 Fuses ® Current-Limiting Effects of LLSRK (600V) fuses Short Circuit 00A 00A 00A Current* 2,700 4,800 5,000 5,000 3,500 6,200 8,500 0,000 4,200 7,000 ...