21DQ04 40v 2.0a schottky rectifier web site: www.taychipst.com 1 of 2 features e-mail: sales@taychipst.com maximum ratings and electrical characteristics ? low profile, axial leaded outline ? high frequency operation ? very low forward voltage drop ? high purity, high temperature epoxy encapsulation for enhanced mechanical strength and moisture resistance ? guard ring for enhanced ruggedness and long term reliability ? lead (pb)-free plating ? designed and qualified for industrial level absolute maximum ratings parameter symbol test conditions values units maximum average forward current see fig. 4 i f(av) 50 % duty cycle at t c = 112 c, rectangular waveform 2 a maximum peak one cycle non-repetitive surge current see fig. 6 i fsm 5 s sine or 3 s rect. pulse following any rated load condition and with rated v rrm applied 420 10 ms sine or 6 ms rect. pulse 70 non-repetitive avalanche energy e as t j = 25 c, i as = 1.0 a, l = 10 mh 5.0 mj repetitive avalanche current i ar current decaying linearly to zero in 1 s frequency limited by t j maximum v a = 1.5 x v r typical 1.0 a note (1) thermal runaway condition for a diode on its own heatsink electrical specifications parameter symbol test conditions values units typ. max. maximum forward voltage drop v fm (1) 2 a t j = 25 c 0.49 0.55 v 4 a 0.60 0.65 2 a t j = 125 c 0.42 0.5 4 a 0.56 0.62 maximum reverse leakage current i rm (1) t j = 25 c v r = rated v r 0.01 0.50 ma t j = 125 c 5.2 10 typical junction capacitance c t v r = 5 v dc (test signal range 100 khz to 1 mhz) 25 c 130 pf typical series inductance l s measured lead to lead 5 mm from package body 8.0 nh thermal - mechanical specifications parameter symbol test conditions values units maximum junction and storage temperature range t j (1) , t stg - 40 to 150 c maximum thermal resistance, junction to ambient r thja dc operation without cooling fin 100 c/w typical thermal resistance, junction to lead r thjl dc operation see fig. 4 25 approximate weight 0.33 g 0.012 oz. marking device case style do-204al (d-41) 21DQ04 dp tot dt j ------------- 1 r thja -------------- <
ratings and characteristic curves 21DQ04 e-mail: sales@taychipst.com web site: www.taychipst.com 2 of 2 schottky rectifier 21DQ04 40v 2.0a fig. 1 - maximum forward voltage drop characteristics fig. 2 - typical values of reverse current vs. reverse voltage fig. 3 - typical junction capacitance vs. reverse voltage fig. 4 - maximum allowable lead temperature vs. average forward current fig. 5 - forward powe r loss characteristics 0.1 1 10 00.30.60.91.2 f fm t = 150c t = 125c t = 2 5 c j j j forward voltage drop - v (v) instantaneous forward current - i (a) 0.0001 0.001 0.01 0.1 1 10 100 010203040 r r 125c 100c 75c 50c 25c re v e rse c u rre n t - i ( m a ) re v e r se v o l t a g e - v ( v ) t = 150c j 10 100 1000 010203040 r t junction capacitance - c (pf) re v e r se v o l t a g e - v ( v ) t = 2 5 c j 0 30 60 90 120 150 0123 dc f( a v ) see note (1) average forward current - i (a) sq u a r e w a v e ( d = 0 . 5 0 ) 80% rat ed v ap p lied r allowable lead temperature - (c) = 1/8 inch 0 0.4 0.8 1.2 1.6 2 0123 dc average power loss - (watts) f(av) rm s li m i t d = 0.20 d = 0.25 d = 0.33 d = 0.50 d = 0.75 averag e forwa rd current - i (a) fig. 6 - maximum non-repetitive surge current 10 100 1000 10 100 1000 10000 fs m no n-rep et it ive surg e current - i (a) p at any rated load condition and with rated v applied fo l l o w i n g su r g e rrm sq uare wa ve pulse duration - t (microsec )
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