Surface Mount Fuses
Thin Film > 0603 Size > Fast-Acting > 494 Series
RoHS Pb
494 Series Fuse, NRA Special Series Integrated Circuit Protector
®
Description
Theꢀ494ꢀSeriesꢀFast-ActingꢀSMFꢀisꢀanꢀultraꢀsmallꢀ(0603ꢀ
size)ꢀthin-filmꢀdeviceꢀdesignedꢀforꢀsecondaryꢀprotectionꢀ
ofꢀcircuitsꢀusedꢀinꢀspaceꢀconstrainedꢀapplicationsꢀsuchꢀ
asꢀhand-heldꢀportableꢀelectronicꢀdevices.ꢀThisꢀseriesꢀisꢀ
100%ꢀlead-freeꢀandꢀmeetsꢀtheꢀrequirementsꢀofꢀtheꢀRoHSꢀ
directive.ꢀNewꢀHalide-Freeꢀ494ꢀSeriesꢀfusesꢀareꢀavailableꢀ
toꢀorderꢀusingꢀtheꢀ“HF”ꢀsuffix.ꢀSeeꢀPartꢀNumberingꢀsectionꢀ
forꢀadditionalꢀinformation.
Features
Agency Approvals
•ꢀ Compatibleꢀwithꢀlead-
freeꢀsoldersꢀandꢀhigherꢀ
temperatureꢀprofiles
•ꢀ Element-coveringꢀmaterialꢀ
isꢀresistantꢀtoꢀindustryꢀ
standardꢀcleaningꢀ
Agency
Agency File number
Ampere rAnge
250ꢀA - 5A
operations
•ꢀ Highꢀperformanceꢀ
materialsꢀprovideꢀ
e10480
®
•ꢀ Mountingꢀpadꢀandꢀ
improvedꢀperformanceꢀ
inꢀelevatedꢀambientꢀ
temperatureꢀapplications
electricalꢀperformanceꢀareꢀ
identicalꢀtoꢀLittelfuseꢀ431ꢀ
andꢀ434ꢀSeriesꢀproducts
lr29862
250ꢀA - 5A
Electrical Characteristics for Series
•ꢀ Markedꢀonꢀtopꢀsurfaceꢀ
•ꢀ Alloy-basedꢀelementꢀ
withꢀcodeꢀtoꢀallowꢀampereꢀ constructionꢀprovidesꢀ
% of Aꢀꢁꢂꢃꢂ
OꢁꢂꢅꢄꢅꢆTꢄꢀꢂ at 25Oc
4ꢀhours,ꢀMinimum
ratingꢀidentificationꢀ
withoutꢀtesting
superiorꢀinrushꢀwithstandꢀ
characteristicsꢀ(I2t)ꢀoverꢀ
ceramicꢀorꢀglass-basedꢀ
0603ꢀfuseꢀproducts
ratꢄꢅꢆ
100%
•ꢀ Lowꢀprofileꢀforꢀheightꢀ
sensitiveꢀapplications
200%
300%
ꢀꢀꢀ5ꢀsec.,ꢀMaximum
0.2ꢀsec.,ꢀMaximum
•ꢀ Flatꢀtopꢀsurfaceꢀforꢀpick-
and-placeꢀoperations
Additional Information
Applications
Secondaryꢀprotectionꢀforꢀspaceꢀconstrainedꢀapplications:
•ꢀ Cellꢀphones
•ꢀ Digitalꢀcameras
•ꢀ DVDꢀplayers
•ꢀ Hardꢀdiskꢀ
drives
Datasheet
Resources
Samples
•ꢀ Batteryꢀpacks
Electrical Specifications by Item
max
noꢀ
noꢀ
powꢂꢃ
Dꢄssꢄꢁatꢄoꢅ
(W)
Aꢆꢂꢅꢉꢊ Aꢁꢁꢃovaꢇs
Aꢀꢁꢂꢃꢂ
ratꢄꢅꢆ
(A)
noꢀꢄꢅaꢇ coꢇd
rꢂsꢄstaꢅꢉꢂ
(Ohꢀs)
noꢀꢄꢅaꢇ
mꢂꢇtꢄꢅꢆ
Aꢀꢁ
codꢂ
Voꢇtaꢆꢂ
ratꢄꢅꢆ
(V)
iꢅtꢂꢃꢃꢈꢁtꢄꢅꢆ
Voꢇtaꢆꢂ
Dꢃoꢁ
ratꢄꢅꢆ
i2t (A2sꢂꢉ)
®
(ꢀV)
0.250ꢀ
0.375ꢀ
0.500ꢀ
0.750ꢀ
1. 0 0
.250ꢀ
.375ꢀ
.500ꢀ
.750ꢀ
0 01. ꢀ
1.25ꢀ
01. 4
01.5ꢀ
1.75ꢀ
002.ꢀ
02.5ꢀ
003.ꢀ
3.15
32ꢀ
32ꢀ
32ꢀ
32ꢀ
32ꢀ
32ꢀ
32
32ꢀ
32ꢀ
32ꢀ
32ꢀ
32ꢀ
32
0.5450
0.2900
0.1870
0.1170
0.0710
0.0530
0.049
0.0410
0.0320
0.0300
0.0220
0.0180
0.017
0.0030ꢀ
0.0053ꢀ
0.0087ꢀ
0.0171ꢀ
0.0212ꢀ
0.0518ꢀ
0.05529
0.0766ꢀ
0.0903ꢀ
0.1103ꢀ
0.1440ꢀ
0.2403ꢀ
0.27405
0.4306ꢀ
0.5760ꢀ
0.9000ꢀ
158.56
128.03
115.71
107.33
89.10
84.32
74.84
81.14
78.75
78.22
76.10
75.04
63.78
74.25
73.72
72.71
0.0396
0.0480
0.0579
0.0805
0.0891
0.1054
0.1048
0.1217
0.1378
0.1564
0.1903
0.2251
0.2009
0.2599
0.2949
0.3635
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
50Aꢀ@32VꢀAC/DC
1.25ꢀ
1.40
1.50ꢀ
1.75ꢀ
2.00ꢀ
2.50ꢀ
3.00ꢀ
3.15
3.50ꢀ
4.00ꢀ
5.00ꢀ
35Aꢀ@32VꢀAC/DC
03.5ꢀ
004.ꢀ
005.ꢀ
32ꢀ
32ꢀ
32ꢀ
0.0150
0.0130
0.0090ꢀ
1. Measured at 10% of rated current, 25ºC.
2. Measured at rated voltage.
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/25/14