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R251002

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AXIAL LEAD AND CARTRIDGE FUSES SUBMINIATURE PICO® II Very Fast-Acting Type Fuse ® ® QPL The PICO® II very fast-acting fuse is designed to meet an extensive array of performance characteristics in a spacesaving subminiature package. ELECTRICAL CHARACTERISTICS: Opening Time 4 hours, Minimum 1 second, Maximum 3 seconds, Maximum 10 seconds, Maximum Std. Type Catalog Number R251.062 R251.125 R251.250 R251.375 R251.500 R251.750 R251 001 R251 01.5 R251 002 R251 02.5 R251 003 R251 03.5 R251 004 R251 005 R251 007 R251 010 R251 012 R251 015 Mil. Type Catalog Number R253.062 R253.125 R253.250 R253.375 R253.500 R253.750 R253 001 R253 01.5 R253 002 R253 003 R253 004 R253 005 R253 007 R253 010 R253 015 Ampere Voltage Rating Rating 1/16 125 1/8 125 1/4 125 3/8 125 1/2 125 3/4 125 1 125 11/2 125 2 125 21/2 125 3 125 31/2 125 4 125 5 125 7 125 10 125 12 32 15 32 Note: Higher Ampere Ratings Available. Contact Technical Assistance for Details 42 Nominal Resistance Cold Ohms 7.0 1.70 0.665 0.395 0.280 0.175 0.128 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 0.587 0.405 0.721 1.19 1.58 2.45 4.14 10.4 25.5 45.2 68.8 .280" REF. 1.5" F L 1.5" 1A .095" DIA. REF. .025" DIA. EPOXY COATING NOTE: .025" diameter for 1/16 –10A, .032" diameter for 12 –15A. 100 1/4A 3/8A 1/2A 3/4A 1A 1 1/2A 2A 2 1/2A 3A 3 1/2A 4A 5A 7A 10A 12A 15A Average Time Current Curves 1/8A AGENCY APPROVALS: Recognized under the Components Program of Underwriters Laboratories and Certified by CSA. Approved by MITI from 1 through 5 amperes. AGENCY FILE NUMBERS: UL E10480, CSA LR 29862. REFERENCE TO MIL SPEC: Available in Military QPL type FM10, conforming to MIL-PRF-23419. To order, change 251 to 253 as shown below. INTERRUPTING RATINGS: 300 amperes at 125 VDC. 50 amperes at 125 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); Method 204, Test Condition C (55–2000 Hz at 10 G’s Peak). Moisture Resistance: MIL-STD-202, Method 106. PHYSICAL SPECIFICATIONS: Materials: Encapsulated, Epoxy-Coated Body; Solder 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 a 7 lb. axial pull test). PACKAGING SPECIFICATIONS: Tape and Reel per EIA296; T1: 2.062" (52.4mm) taped spacing; 5,000 per reel. Option: Radial Lead Version; 0.4" lead spacing; to order, change 251 to 252. PATENTED ORDERING INFORMATION: 1/16A 200% Ampere Rating 1/16 –15 1/16 –7 10 12 –15 10 TIME IN SECONDS % of Ampere Rating 100% 1 0.1 0.01 0.001 0.05 0.1 1 10 100 CURRENT IN AMPERES 1000

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