SURFACE MOUNT FUSES THIN-FILM SURFACE MOUNT 1206 Very Fast-Acting Thin-Film Type 429 Series ® ® • For new designs below 4A please consult the 433 Series ELECTRICAL CHARACTERISTICS: Opening Time at 25°C 4 hours, Minimum 5 seconds, Maximum 0.2 seconds, Maximum 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 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 Marking Code FB FC FD FE FF FG FH FJ FK FL FN FO FP Nominal Voltage Rating 125 125 125 125 63 63 63 63 63 63 63 32 32 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 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 RECOMMENDED PAD LAYOUTS 3.18 (.125") 1.52 (.060") 1.52 (.060") 1.14 (.045") 3.81 (.150") 2.03 (.080") REFLOW SOLDER 1.12 (.044") REF. 2.49 (.098") REF. 1.14 (.045") .635 (.025") .75A 1A 1.25A 1.5A 1.75A 2A 2.5A 3A 4A 5A 7A Average Time Current Curves .125A .2A .25A .375A .5A 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 50 amperes at rated voltage, VAC/VDC 4 – 7A 35 amperes at rated voltage, VAC/VDC 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. PHYSICAL SPECIFICATIONS: Materials: Body: Epoxy Substrate Terminations: Copper/Nickel/Tin-Lead (95/5) Cover Coat: Conformal Coating Soldering Parameters: Reflow Solder — 260°C, 30 seconds maximum PACKAGING SPECIFICATIONS: 8mm Tape and Reel per EIA-RS481-1 (IEC 286, part 3); 3,000 per reel, add packaging suffix, WR. PATENTED ORDERING INFORMATION: 100 10 TIME IN SECONDS % of Ampere Rating 100% 200% 300% 1 0.1 For New Designs Below 4A Use 433 Series. 429 004 4.0 FS 24 0.01926 429 005 5.0 FT 24 0.01375 429 007 7.0 FU 24 0.00925 1 Measured at 10% of rated current, 25°C. 2 Measured at rated voltage. 1.50 2.70 3.60 0.01 0.001 0.1 1 10 CURRENT IN AMPERES 100 33