© 2016 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/10/16
Axial Lead & Cartridge Fuses
PICO® ll Fuse > Very Fast-Acting Fuse > 263 Series
263 Series, PICO® II 250 Volt Fuse, Very Fast Acting
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 0.062 - 5A
PS
EPSE_NBK200416-JP1021 1A - 5A
29862 0.125 - 5A
Features
Electrical Characteristics
• 250V rating
• Very fast–acting
• Small size
• Wide range of current
rating available (62mA to
5A)
• RoHS compliant and
Halogen-free
• Wide operating
temperature range
• Low temperature
rerating
% of Ampere
Rating Opening Time
100% 4 Hours, Min.
200% 1 Second, Max.
300% 0.1 Second, Max.
Applications
RoHS
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
50A@250VAC
PSE: 100A@
125VAC
5.50 0.000192 0.74 x
0.125 .125 250 1.745 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 0.252 0.084 0.302 x x
0.750 .750 250 0.150 0.0411 0.176 x x
1. 0 0 0 01. 250* 0.105 0.087 0.165 x x x
1.50 01. 5 250* 0.0635 0.2958 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
* PSE Approval has max. voltage range of 125VAC.
Electrical Characteristics
• Lighting system
• Power supply
• LCD/PDP TV
• LCD monitor
• Office automation
machines
• Audio/Video system
• Medical equipment
PS
E
Application testing is strongly recommended.
Additional Information
Datasheet Samples
Resources
© 2016 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/10/16
Axial Lead & Cartridge Fuses
PICO® ll Fuse > Very Fast-Acting Fuse > 263 Series
Average Time Current Curves
100
10
1
0.1
0.01
0.001
1/16A
0.05 0.1 110 100
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 Re-rating Curve
Soldering Parameters
Wave Parameter Lead-Free Recommendation
Preheat:
(Depends on Flux Activation Temperature) (Typical Industry Recommendation)
Temperature Minimum: 100° C
Temperature Maximum: 150° C
Preheat Time: 60-180 seconds
Solder Pot Temperature: 260° C Maximum
Solder Dwell Time: 2-5 seconds
Recommended Hand-Solder Parameters:
Solder Iron Temperature: 350° C +/- 5°C
Heating Time: 5 seconds max.
Note: These devices are not recommended for IR or
Convection Reflow process.
Recommended Process Parameters:
Note:
Rerating depicted in this curve is in addition to the standard derating of 25% for
continuous operation.
© 2016 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/10/16
Axial Lead & Cartridge Fuses
PICO® ll Fuse > Very Fast-Acting Fuse > 263 Series
Materials
Encapsulated, Epoxy-Coated
Body: Solder Coated Copper Leads.
RoHS compliant
Product: Pure Tin–coated Copper wire
leads
Solderability MIL-STD-202. Method 208.
Product Marking Body marking, current rating and logo
Operating
Temperature –55ºC to +125ºC (Consider re-rating)
Shock MIL-STD-202, Method 213, Test Condition
I (100 G’s peak for 6 milliseconds)
Product Characteristics
Vibration
MIL-STD-202, Method 201 (10–55
Hz); MIL-STD-202, Method 204, Test
Condition C (55–2000 Hz at 10 G’s
Peak)
Salt Spray MIL-STD-202, Method 101,
Test Condition B (48 hrs.)
Insulation Resistance
(After Opening):
MIL-STD-202, Method 302,
Test Condition A (10,000 ohms
minimum at 100 volts)
Resistance to Soldering
Heat
MIL-STD-202, Method 210,
Test Condition C (10 sec. at 260ºC)
Thermal Shock MIL-STD-202, Method 107, Test
Condition B (–55ºC to 125ºC)
Moisture Resistance MIL-STD-202, Method 106
Lead Pull Force
MIL-STD-202, Method 211,
Test Condition A (will withstand 7 lb.
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 Specification Quantity Quantity &
Packaging Code
T1: 52.4mm (2.062”)
Tape and Reel EIA 296 Please refer to available quantities
above in “Part Numbering System”
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
Notes: * T1 dimension is defined as the length of the component between the two tapes. The full component length is 62.7mm (2.468").
