Surface Mount Fuses Thin Film > 1206 Size > Very Fast-Acting > 429 Series RoHS Pb 429 Series 1206 Fast-Acting Fuse Description The 429 Series Fast-Acting SMF is a small (1206 size) thin- film device designed for secondary protection of circuits used in space constrained applications such as hand-held portable electronic devices. This series is Halogen-Free, Lead-Free and meets the requirements of the RoHS directive. Features RoHS compliant and For new designs up to Lead-Free 7A device 5A please consult the available-add L suffix to 433 or 466 Series part number. Halogen-Free 7A device Agency Approvals available-add HF suffix to the part number AGENCY AGENCY FILE NUMBER AMPERE RANGE E10480 7A Applications Secondary protection for space constrained applications 29862 7A such as: Cell phones DVD players Battery packs Hard disk drives. Electrical Characteristics for Series Digital cameras % of Ampere O Opening Time at 25 C Rating Additional Information 100% 4 hours, Minimum 200% 5 sec., Maximum 300% 0.2 sec., Maximum Datasheet Resources Samples Electrical Specifications by Item Agency Ampere Max Nominal Amp Interrupting Nominal Cold Approvals Rating Voltage Rating Melting Code Rating Resistance (Ohms) 2 2 (A) (V) I t (A sec) 7.00 007. 24 35A 24VAC/VDC 0.009 4.900 x x 1. Measured at 10% of rated current, 25C. 2. Measured at rated voltage. 2015 Littelfuse, Inc. Specifications are subject to change without notice. Specifications are subject to change without notice. Application testing is strongly recommended. Revised: 04/30/15Surface Mount Fuses Thin Film > 1206 Size > Very Fast-Acting > 429 Series Temperature Re-rating Curve Average Time Current Curves 100 10 1 0.1 Note: 1. Rerating depicted in this curve is in addition to the standard derating of 25% for continuous operation. 0.01 Example: For continuous operation at 70 degrees celsius, the fuse should be deratedas follows: I = (0.75)(0.80)I = (0.60)I RAT RAT 2. The temperature derating curve represents the nominal conditions. For questions 0.001 about temperature derating curve, please consult Littelfuse technical support 0.1 1 10 100 for assistance. CURRENT IN AMPERES Soldering Parameters t Reflow Condition Pb Free assembly P T P Critical Zone Ramp-up T to T L P - Temperature Min (T ) 150C s(min) T L Pre Heat - Temperature Max (T ) 200C s(max) t L T S(max) - Time (Min to Max) (t ) 60 180 secs s Ramp-down Average ramp up rate (Liquidus Temp Preheat 5C/second max (T ) to peak T L S(min) t S T to T - Ramp-up Rate 5C/second max S(max) L - Temperature (T ) (Liquidus) 217C L 25 Reflow time to peak temperature - Temperature (t ) 60 150 seconds L Time (t 25C to peak) +0/-5 Peak Temperature (T ) 250 C P Time within 5C of actual peak 20 40 seconds Temperature (t ) p Ramp-down Rate 5C/second max Time 25C to peak Temperature (T ) 8 minutes Max. P Do not exceed 260C Wave Soldering 260C, 10 seconds max. 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 04/30/15 TIME IN SECONDS 7A Temperature