Surface Mount Fuses Thin Film > 1206 Size > Very Fast-Acting > 429 Series RoHS Pb 429 Series Fuse Description The 429 Series Fast-Acting SMF is a small (1206 size) thin- lm device designed for secondary protection of circuits used in space constrained applications such as hand-held portable electronic devices. This series is 100% lead-free and meets the requirements of the RoHS directive. Features t P)4 DPNQMJBOU BOE 3 t For new designs up Lead-Free 7A device to 5A please consult Agency Approvals available-add L sufx the 433 or 466 Series to catalog number AGENCY AGENCY FILE NUMBER AMPERE RANGE E10480 125MA - 7A Applications LR29862 125MA - 7A Secondary protection for space constrained applications such as: t FMM QIPOFT t FST Z 7% QMB % Electrical Characteristics for Series t LT UFS Z QBD BU t FT )BSE EJTL ESJW t %JHJU BM DBNFSBT % of Ampere O Opening Time at 25 C Rating 100% 4 hours, Minimum 200% 5 sec., Maximum 300% 0.2 sec., Maximum Electrical Specications by Item Max Agency Ampere Nominal Cold Nominal Amp Voltage Interrupting Approvals Rating Resistance Melting Code Rating Rating 2 2 (A) (Ohms) I t (A sec) (V) 7.00 007. 24 0.00925 3.6000 x x 35 amperes voltage, VAC/VDC 7.00 007. 24 0.00925 3.6000 x x 1. Measured at 10% of rated current, 25C. 2. Measured at rated voltage. 429 Series 2008 Littelfuse, Inc.2008 Littelfuse, Inc. 11 Specications are subject to change without notice. Revision: May 27, 2008 Please refer to www.littelfuse.com/series/429.html for current information.Surface Mount Fuses Thin Film > 1206 Size > Very Fast-Acting > 429 Series Temperature Rerating Curve Average Time Current Curves 100 10 1 0.1 0.01 0.001 0.1 1 10 100 CURRENT IN AMPERES Soldering Parameters Reow Condition Pb Free assembly - Temperature Min (T ) 150C s(min) Pre Heat - Temperature Max (T ) 200C s(max) - Time (Min to Max) (t ) 60 180 secs s Average ramp up rate (Liquidus Temp 5C/second max (T ) to peak L T to T - Ramp-up Rate 5C/second max S(max) L - Temperature (T ) (Liquidus) 217C L Reow - Temperature (t ) 60 150 seconds L +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. 429 Series 12 2008 Littelfuse, Inc.2008 Littelfuse, Inc. Revision: May 27, 2008 Specications are subject to change without notice. Please refer to www.littelfuse.com/series/429.html for current information. TIME IN SECONDS 7A