207
© 2009 Littelfuse, Inc.
Specications are subject to change without notice.
Axial Lead & Cartridge Fuses
263 Series
Please refer to www.littelfuse.com/series/263.html for current information.
PICO® ll > Very Fast-Acting > 263 Series
263 Series
263 Series, PICO® II 250 Volt, Very Fast-Acting Fuse
Description
The PICO® II 263 Series Fuse is a specially designed
axial leaded fuse that achieves a 250V rating in a small
package.
Agency Approvals
Agency Agency File Number Ampere Range
E10480 62mA - 5A
PS
EJET 1896-31007-1001 1A - 5A
LR 29862 125mA - 5A
Features
Electrical Characteristics
t 7SBUJOH
t 7FSZGBTUoBDUJOH
t 4NBMMTJ[F
t 8JEFSBOHFPGDVSSFOU
SBUJOHBWBJMBCMFN"UP
5A)
t 3P)4DPNQMJBOU
)BMPHFOGSFF
t 8JEFPQFSBUJOH
temperature range
t -PXUFNQFSBUVSF
de-rating
% of Ampere
Rating Opening Time
100% )PVSTMin.
200% 4FDPOEMax.
300% 4FDPOEMax.
Applications
Ampere
Rating
(A)
Amp Code
Max
Voltage
Rating
(V)
Interrupting
Rating
Nominal Cold
Resistance
(Ohms)
Nominal
Melting
I2t (A2 sec)
Nom
Voltage Drop
(mV)
Agency Approvals
PS
E
0.062 .062 250
50 amperes
at 250 VAC
PSE: 100
amperes
at 125 VAC.
5.50 0.000192 0.74 x
0.125 .125 250 1.75 0.00251 0.3 x x
0.250 .250 250 0.715 0.0165 0.235 x x
0.375 .375 250 0.391 0.0444 0.195 x x
0.500 .500 250 0.332 0.084 0.302 x x
0.750 .750 250 0.150 0.0411 0.176 x x
1.00 001. 250 0.105 0.087 0.165 x x x
1.50 01.5 250 0.0635 0.398 0.148 x x x
2.00 002. 250 0.0444 0.74 0.137 x x x
2.50 02.5 250 0.0340 1.197 0.128 x x x
3.00 003. 250 0.0274 1.77 0.1225 x x x
3.50 03.5 250 0.0224 2.33 0.1175 x x x
4.00 004. 250 0.0193 3.08 0.1125 x x x
5.00 005. 250 0.0145 5.55 0.1065 x x x
Electrical Characteristics
t -JHIUJOHTZTUFN
t 1PXFSTVQQMZ
t -$%1%157
t -$%NPOJUPS
t 0GåDFBVUPNBUJPO
machines
t "VEJP7JEFPTZTUFN
t .FEJDBMFRVJQNFOU
PS
E
Revised: July 27, 2011
Introduction to Circuit Protection
Introduction to Circuit Protection
Transientology
208 © 2009 Littelfuse, Inc.
Specications are subject to change without notice.
Axial Lead & Cartridge Fuses
263 Series
Please refer to www.littelfuse.com/series/263.html for current information.
PICO® ll > Very Fast-Acting > 263 Series
Average Time Current Curves
100
10
1
0.1
0.01
0.001
1/16A
0.05 0.1 1 10 100
1/8A
1/4A
3/8A
1/2A
3/4A
1A
1 1/2A
2A
2 1/2A
3A
3 1/2A
4A
5A
TIME IN SECONDS
CURRENT IN AMPERES
Temperature Rerating Curve
Soldering Parameters
Wave Parameter Lead-Free Recommendation
Preheat:
%FQFOETPO'MVY"DUJWBUJPO5FNQFSBUVSF 5ZQJDBM*OEVTUSZ3FDPNNFOEBUJPO
5FNQFSBUVSF.JOJNVN 100° C
5FNQFSBUVSF.BYJNVN 150° C
Preheat Time: TFDPOET
Solder Pot Temperature: 260° $.BYJNVN
Solder Dwell Time: TFDPOET
Recommended Hand-Solder Parameters:
4PMEFS*SPO5FNQFSBUVSF¡$¡$
)FBUJOH5JNFTFDPOETNBY
Note: These devices are not recommended for IR or
Convection Reow process.
Recommended Process Parameters:
/PUF
 %FSBUJOHEFQJDUFEJOUIJTDVSWFJTJOBEEJUJPOUPUIFTUBOEBSEEFSBUJOHPGGPS
DPOUJOVPVTPQFSBUJPO
209
© 2009 Littelfuse, Inc.
Specications are subject to change without notice.
Axial Lead & Cartridge Fuses
263 Series
Please refer to www.littelfuse.com/series/263.html for current information.
PICO® ll > Very Fast-Acting > 263 Series
263 Series
Materials
&ODBQTVMBUFE&QPYZ$PBUFE
#PEZ:4PMEFS$PBUFE$PQQFS-FBET
3P)4DPNQMJBOU
1SPEVDU1VSF5JOoDPBUFE$PQQFSXJSF
leads
Solderability .*-45%.FUIPE
Product Marking #PEZNBSLJOHDVSSFOUSBUJOHBOEMPHP
Operating
Temperature o$UP$
Shock .*-45%.FUIPE5FTU$POEJUJPO
*(TQFBLGPSNJMMJTFDPOET
Product Characteristics
Vibration
.*-45%.FUIPEo
)[.*-45%.FUIPE5FTU
$POEJUJPO$o)[BU(T
Peak)
Salt Spray .*-45%.FUIPE
5FTU$POEJUJPO#IST
Insulation Resistance
(After Opening):
.*-45%.FUIPE
5FTU$POEJUJPO"PINT
NJOJNVNBUWPMUT
Resistance to Soldering
Heat
.*-45%.FUIPE
5FTU$POEJUJPO$TFDBU$
Thermal Shock .*-45%.FUIPE5FTU
$POEJUJPO#o$UP$
Moisture Resistance .*-45%.FUIPE
Lead Pull Force
.*-45%.FUIPE
5FTU$POEJUJPO"XJMMXJUITUBOEMC
axial pull test)
F
L
3 1/2 A
250 V
F
L
3 1/2 A
250 V
27.78
(1.094")
27.78
(1.094")
7.11 (.280")
62.7 (2.468")
52.4 (2.062")*
0.64 (.025") 3.94 (.16")
MAX
6.35 (.25")
tape
5.0 (.197")
6.35 (.25")
tape
Dimensions
Packaging
Packaging Option Packaging Specication Quantity Quantity &
Packaging Code
T1: 52.4mm (2.062”)
Tape and Reel EIA 296 1MFBTFSFGFSUPBWBJMBCMFRVBOUJUJFT
BCPWFJOi1BSU/VNCFSJOH4ZTUFNw
Part Numbering System
0263 xxxx W R T1 L
Lead Length
Type of Packaging
Quantity
Current Rating
Series
T1: 52.4mm (2.062”)*
RoHS + HF
R = Reel
A = Ammo Pack
X = Loose Pack
W = 3000
M = 1000
H = 100
Refer to Amp Code column of
Electrical Characteristics Table
/PUFT5EJNFOTJPOJTEFåOFEBTUIFMFOHUIPGUIFDPNQPOFOUCFUXFFOUIFUXPUBQFT5IFGVMMDPNQPOFOUMFOHUIJTNN