Axial Lead and Cartridge Fuses Subminiature PICO(R) II Very Fast-Acting Fuse 251/253 RoHS QPL (R) (R) The PICO(R) II very fast-acting fuse is designed to meet an extensive array of performance characteristics in a space-saving subminiature package. * RoHS Compliant version now available, use ordering suffix `L' (see example on data sheet). ELECTRICAL CHARACTERISTICS: 200% Ampere Rating 1/16 -15 1/16 -7 10 12 -15 Opening Time 4 hours, Minimum 1 second, Maximum 3 seconds, Maximum 10 seconds, Maximum AGENCY APPROVALS: Recognized under the Components Program of Underwriters Laboratories and Certified by CSA. Approved by METI from 1 through 5 amperes. AGENCY FILE NUMBERS: UL E10480, CSA LR 29862. REFERENCE TO MIL SPEC: Available in FM10 on QPL for MIL-PRF-23419. To order, change 251 to 253 as shown below. INTERRUPTING RATINGS: 38.1 (1.5") LF 0.64 (.025") DIA. 300 amperes at rated voltage VDC. 50 amperes at rated voltage VAC. ENVIRONMENTAL SPECIFICATIONS: Operating Temperature: -55C to 125C. Wave Solder -- 260C, 10 seconds maximum. Solderability: MIL-STD-202, Method 208. Lead Pull Force: MIL-STD-202, Method 211, Test Condition A (will withstand a 7 lb. axial pull test). PATENTED ORDERING INFORMATION: 0253 003 0253 004 0253 005 0253 007 0253 010 0253 015 Note: Higher Ampere Ratings Available. Contact Technical Assistance for Details 388 EPOXY COATING T1: 2.062" (52.4mm) taped spacing; 5,000 per reel. packaging suffix. Example: 0251001.NRT1L (RoHS Compliant 1A, 5,000 per reel). 100 1/8A Average Time Current Curves 1/16A Soldering Parameters: 0253 01.5 0253 002 2.80 (0.110") DIA. MAX. Options: For RoHS Compliant devices add the letter `L' to end of Wire Leads. RoHS Compliant Product: Pure Tin coated copper wire leads. Flammability Rating: UL 94V0 10 Voltage Rating 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 32 32 Nominal Resistance Cold Ohms 7.0 1.70 0.665 0.395 0.280 0.175 0.128 0.100 0.0823 0.0473 0.0360 0.0290 0.0240 0.0204 0.0155 0.0105 0.00705 0.0055 0.00446 Nominal Melting I 2t A2 Sec. 0.000113 0.00174 0.0116 0.0296 0.0598 0.153 0.256 0.390 0.587 0.405 0.721 1.19 1.58 2.45 4.14 10.4 25.5 45.2 68.8 TIME IN SECONDS Ampere Rating 1/16 1/8 1/4 3/8 1/2 3/4 1 11/4 11/2 2 21/2 3 31/2 4 5 7 10 12 15 1A PACKAGING SPECIFICATIONS: Tape and Reel per EIA-296; PHYSICAL SPECIFICATIONS: Materials: Encapsulated, Epoxy-Coated Body; Solder Coated Copper Mil. Type Catalog Number 0253.062 0253.125 0253.250 0253.375 0253.500 0253.750 0253 001 38.1 (1.5") NOTE: .025" diameter for 1/16 -10A, .032" diameter for 12 -15A. 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); Method 204, Test Condition C (55-2000 Hz at 10 G's Peak). Moisture Resistance: MIL-STD-202, Method 106. Std. Type Catalog Number 0251.062 0251.125 0251.250 0251.375 0251.500 0251.750 0251 001 0251 1.25 0251 01.5 0251 002 0251 02.5 0251 003 0251 03.5 0251 004 0251 005 0251 007 0251 010 0251 012 0251 015 7.11 (.280") REF. 1/4A 3/8A 1/2A 3/4A 1A 1 1/4A 1 1/2A 2A 2 1/2A 3A 3 1/2A 4A 5A 7A 10A 12A 15A % of Ampere Rating 100% 1 0.1 0.01 0.001 0.05 0.1 w w w. l i t t e l f u s e . c o m 1 10 100 CURRENT IN AMPERES 1000