Subminiature
Axial Lead and Cartridge Fuses
PICO
®
II 250 Volt Very Fast-Acting Fuse 263 Series
389
www.littelfuse.com
The PICO
®
II 250 Volt Fuse is a specially designed axial leaded fuse that
achieves a 250 volt rating in a small package.
• RoHS Compliant version now available, use ordering suffix ‘L’
(see example on data sheet).
ELECTRICAL CHARACTERISTICS:
% of Ampere Opening
Rating Time
100% 4 hours, Minimum
200% 1 second, Maximum
300% 0.1 second, Maximum
AGENCY APPROVALS: Recognized under the Components
Program of Underwriters Laboratories and Certified by CSA.
AGENCY FILE NUMBERS: UL E10480, CSA LR 29862.
INTERRUPTING RATING: 50 amperes at 250 VAC.
ENVIRONMENTAL SPECIFICATIONS:
Operating Temperature:
–55°C to 125°C.
Shock: MIL-STD-202, Method 213, Test Condition I
(100 G’s peak for 6 milliseconds).
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 260°C).
Thermal Shock: MIL-STD-202, Method 107,
Test Condition B (–55°C to 125°C).
Moisture Resistance: MIL-STD-202, Method 106.
PHYSICAL SPECIFICATIONS:
Materials:
Encapsulated, Epoxy-Coated Body; Solder Coated
Copper Leads.
RoHS Compliant Product: Pure Tin coated copper
wire leads.
Soldering Parameters:
Wave Solder — 260°C, 10 seconds maximum.
Solderability: MIL-STD-202, Method 208.
Lead Pull Force: MIL-STD-202, Method 211,
Test Condition A (will withstand 7 lb. axial pull test).
PATENTED
ORDERING INFORMATION:
Nominal Nominal
Catalog Ampere Voltage Resistance Melting I
2
t
Number Rating Rating Cold Ohms A
2
Sec.
0263.062 1/16 250 5.50 0.000192
0263.125 1/8 250 1.75 0.00251
0263.250 1/4 250 0.715 0.0165
0263.375 3/8 250 0.391 0.0444
0263.500 1/2 250 0.252 0.1125
0263.750 3/4 250 0.150 0.0411
0263 001 1 250 0.105 0.087
0263 01.5 1
1
/
2
250 0.0635 0.398
0263 002 2 250 0.0444 0.74
0263 02.5 2
1
/
2
250 0.0340 1.197
0263 003 3 250 0.0274 1.77
0263 03.5 3
1
/
2
250 0.0224 2.33
0263 004 4 250 0.0193 3.08
0263 005 5 250 0.0145 5.55
Average Time Current Curves
REF.
DIA.
DIA. REF.
