(1/2) 002-04 / 20080821 / e531_vlf4012s.fm ? all specifications are subject to change without notice. smd inductors(coils) for power line(wound, magnetic shielded) vlf series vlf4012s features miniature size mount area: 3.6 3.8mm low profile: 1.2mm max. height generic use for portable dc to dc converter line. high magnetic shield construction should actualize high resolu- tion for emc protection. available for automatic mounting in tape and real package. the products contain no lead and also support lead-free soldering. it is a product conforming to rohs directive. applications power souce inductor for mobile devices such as mobile phones, hdds, and dscs shapes and dimensions recommended pc board pattern electrical characteristics ? rated current: value obtained when current flows and the temperature has risen to 40c or when dc current flows and the nominal value of inductance has fallen by 30%, whichever is smaller. operating temperature range: ?40 to +105c (including self-temperature rise) typical electrical characteristics inductance vs. dc superposition characteristics vlf4012st-1r0n1r9 vlf4012st-2r2m1r3 conformity to rohs directive 4r7 3.8 0.2 3.6 0.2 dimensions in mm 1.2max. 4.7 2.9 1.3 dimensions in mm part no. inductance (h) inductance tolerance(%) test frequency (mhz) dc resistance( ? ) rated current(a) ? max. typ. based on inductance change max. based on temperature rise typ. vlf4012st-1r0n1r9 1 30 1 0.054 0.045 2.7 1.9 vlf4012st-2r2m1r3 2.2 20 1 0.12 0.097 1.7 1.3 vlf4012st-3r3m1r1 3.3 20 1 0.16 0.13 1.5 1.1 vlf4012st-4r7m1r0 4.7 20 1 0.19 0.16 1.4 1 vlf4012st-6r8mr80 6.8 20 1 0.32 0.27 1 0.8 VLF4012ST-100MR65 10 20 1 0.49 0.41 0.9 0.65 0.0 0.4 0.2 0.8 0.6 1.0 1.2 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 inductance ( h ) dc current ( a ) 0.0 1.0 0.5 2.0 1.5 2.5 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.2 2.0 inductance ( h ) dc current ( a ) conformity to rohs directive: this means that, in conformity with eu directive 2002/95/ec, lead, cadmium, mercury, hexavalent chromium, and specific bromine-based flame retardants, pbb and pbde, have not been used, except for exempted applications.
(2/2) 002-04 / 20080821 / e531_vlf4012s.fm all specifications are subject to change without notice. typical electrical characteristics inductance vs. dc superposition characteristics vlf4012st-3r3m1r1 vlf4012st-4r7m1r0 vlf4012st-6r8mr80 VLF4012ST-100MR65 test circuit 0.0 1.0 0.5 2.0 1.5 3.0 2.5 3.5 4.0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 inductance ( h ) dc current ( a ) 0 1 2 4 3 5 6 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 inductance ( h ) dc current ( a ) 0 1 2 4 3 5 6 7 8 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 inductance ( h ) dc current ( a ) 0 2 4 6 8 10 12 0.0 0.2 0.4 0.6 0.8 1.0 1.2 inductance ( h ) dc current ( a ) 1 2 a c=20,000 f l=0.1h 1: lcr meter 4285a f=1mhz 2: dc constant current sample
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