460 LITTELFUSE
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SUBMINIATURE SURFACE MOUNT PICO® SMF Very Fast-Acting Type Fuse 459 Series The PICO® SMF Very Fast-Acting Fuse provides high per- formance in a rectangular package suitable for reflow and wave soldering methods. ELECTRICAL CHARACTERISTICS: % of Ampere Opening Rating Time 100% 4 hours, Minimum 200% 1 second, Max imum 300% 0.1 second, Max imum AGENCY APPROVALS: Recognized under the Components Program of Underwriters Laboratories and Certified by CSA. Approved by METI 1 through 5 amperes. AGENCY FILE NUMBERS: UL E10480, CSA LR 29862. INTERRUPTING RATINGS: 50 amperes at 125 VAC. 300 amperes at 125 VDC. 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, .06 in. total excursion). Salt Spray:MIL-STD-202, Method 101, Test Condition B (48 hrs.). Insulation Resistance (After Opening):MIL-STD-202, Method 302, (10,000 ohms minimum at 100 volts). Resistance to Soldering Heat:MIL-STD-202, Method 210, Test Condition F (10 sec. at 260°C). Thermal Shock:MIL-STD-202, Method 107, Test Condition B (–65 to 125°C). Moisture Resistance:MIL-STD-202, Method 106, High Humidity (90-98 RH), Heat (65°). PHYSICAL SPECIFICATIONS: Materials:Body: Molded Thermoplastic Terminations: Tin-Lead Plated Copper Soldering Parameters: Wave Solder — 260°C, 10 seconds maximum Reflow Solder — 260°C, 30 seconds maximum Solderability:MIL-STD-202, Method 208. PACKAGING SPECIFICATIONS: 12mm Tape and Reel per EIA-RS481 (IEC 286, part 3); 500 per reel, add packaging suffix, UR. PATENTED ORDERING INFORMATION: Nominal Nominal Catalog Ampere Voltage Resistance Melting I 2t Number Rating Rating Cold Ohms A 2 Sec. R459 .062 1/16 125 7.0 0.000075 R459 .125 1/8 125 1.70 0.00163 R459 .250 1/4 125 0.665 0.0106 R459 .375 3/8 125 0.395 0.0254 R459 .500 1/2 125 0.280 0.0546 R459 .750 3/4 125 0.175 0.155 R459 001 1 125 0.125 0.281 R459 01.5 1 1/2 125 0.0800 0.650 R459 002 2 125 0.0468 0.421 R459 02.5 2 1/2 125 0.0350 0.721 R459 003 3 125 0.0290 1.23 R459 03.5 3 1/2 125 0.0240 1.65 R459 004 4 125 0.0200 2.35 R459 005 5 125 0.0155 3.90 100 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 1 1/2A 2 1/2A 3 1/2A TIME IN SECONDS CURRENT IN AMPERES ® ® Average Time Current Curves .170"
5 A 1 2 5 V
B 3® ® .120" .117" .285" REF. .325" .065" .195" .051" REF. .080" RECOMMENDED PAD LAYOUT