Surface Mount Fuses Thin-Film Surface Mount 1206 Very Fast-Acting Fuse 429 Series ® ® • For new designs please consult the 433 or 466 Series on pages 258-260. ELECTRICAL CHARACTERISTICS: % of Ampere Rating 100% 200% 300% Opening Time at 25°C 4 hours, Minimum 5 seconds, Maximum 0.2 seconds, Maximum AGENCY APPROVALS: Recognized under the Components Program of Underwriters Laboratories and Certified by CSA. AGENCY FILE NUMBERS: UL E10480, CSA LR 29862. INTERRUPTING RATINGS: 0.125 – 3A 4 – 7A 50 amperes at rated voltage, VAC/VDC 35 amperes at rated voltage, VAC/VDC RECOMMENDED PAD LAYOUTS 3.18 (.125") ENVIRONMENTAL SPECIFICATIONS: Operating Temperature: – 55°C to 90°C. Consult temperature rerating chart on page 4. For operation above 90°C contact Littelfuse. Vibration: Withstands 10– 55 Hz per MIL-STD-202F, Method 201A and 10-2000 Hz at 20 G’s per MIL-STD-202F, Method 204D, Condition D. Insulation Resistance (After Opening): Greater than 10 KOhm. Resistance to Soldering Heat: Withstands 60 seconds above 200°C up to 260°C, maximum. Thermal Shock: Withstands 5 cycles of – 55° to 125°C. 1.52 (.060") 1.52 (.060") 1.14 (.045") 3.81 (.150") 1.12 2.03 (.044") (.080") REF. REFLOW SOLDER 2.49 (.098") REF. PHYSICAL SPECIFICATIONS: Materials: Body: Epoxy Substrate 1.14 (.045") .635 (.025") Terminations: Copper/Nickel/Tin-Lead (95/5) Cover Coat: Conformal Coating Soldering Parameters: .75A 1A 1.25A 1.5A 1.75A 2A 2.5A 3A 4A 5A 7A PACKAGING SPECIFICATIONS: 8mm Tape and Reel per EIA-RS481-1 (IEC 286, part 3); 3,000 per reel, add packaging suffix, WR. .125A .2A .25A .375A .5A Average Time Current Curves Reflow Solder — 260°C, 30 seconds maximum 100 PATENTED ORDERING INFORMATION: For New Designs Use 433 or 466 Series. 1 2 Ampere Rating 0.125 0.200 0.250 0.375 0.500 0.75 1.00 1.25 1.50 1.75 2.0 2.5 3.0 4.0 5.0 7.0 Marking Code FB FC FD FE FF FG FH FJ FK FL FN FO FP FS FT FU Nominal Voltage Rating 125 125 125 125 63 63 63 63 63 63 63 32 32 24 24 24 Nominal Resistance Cold Ohms1 2.30000 0.93800 0.62500 0.37500 0.24050 0.13700 0.09950 0.07475 0.06250 0.05000 0.03975 0.03065 0.02625 0.01926 0.01375 0.00925 10 Melting I 2t (A2 Sec.)2 0.00020 0.00055 0.00100 0.00280 0.0060 0.0170 0.035 0.065 0.125 0.150 0.230 0.500 0.700 1.50 2.70 3.60 TIME IN SECONDS Catalog Number 429.125 429.200 429.250 429.375 429.500 429.750 429 001 429 1.25 429 01.5 429 1.75 429 002 429 02.5 429 003 429 004 429 005 429 007 1 0.1 0.01 Measured at 10% of rated current, 25°C. Measured at rated voltage. 0.001 0.1 w w w. l i t t e l f u s e . c o m 1 10 CURRENT IN AMPERES 100 364