rev. a / ah bas21 a /c/s three terminals smd switching diodes taitron componen t s incorporated www.taitroncomponents.com page 1 of 6 tel: (800) - taitron (800) - 824 - 8766 (661) - 257 - 6060 fax: (800)-taitfax (800)-824-8329 (661)-257-6415 three terminals smd switching diodes features ? high reverse breakdown voltage ? fast switching speed ? low reverse leakage current ? surface mount package ideally suited for automatic insertion ? galvanically isolated dual configurations to save board space ? rohs compliant mechanical data maximum ratings (t ambient =25oc unless noted otherwise) symbol description BAS21A bas21c bas21s unit conditions pinout figure 5 4 3 marking code 21a 21c 21s v r reverse voltage 250 v v rrm peak reverse voltage 250 v i f(av) average forward rectified current 0.2 a t a =25 c i fsm non-repetitive peak forward surge current 4 a t=1.0s p d power dissipation 250 mw r thja thermal resistance from junction to ambient air 357 c/w t j, t stg operating junction and storage temperature range -55 to +150 c case: sot-23, plastic case terminals: solderable per mil-std-750, method 2026 weight: approx. 0.008 gram sot-23
three terminals smd switching rev. a / ah bas21 a /c/s www.taitroncomponents.com page 2 of 6 fig.1- power derating curve ambient temperature (c) fig.2- typical forward characteristics forward voltage (v) electrical characteristics (t ambient =25oc unless noted otherwise) symbol description min. typ. max. unit conditions v (br) reverse breakdown voltage - - 250 v i r =100a 0.7 i f =1.0ma v f forward voltage - - 1.0 v i f =100ma 0.1 a v r =200v i r reverse current - - 100 a v r =200v, t j =150 c c t total capacitance - - 5.0 pf v r =0v, f=1.0mhz t rr reverse recovery time - - 50 ns i f =i r =30ma, r l =100 ? typical characteristics curves forward current (ma) power dissipation (mw)
three terminals smd switching rev. a / ah bas21 a /c/s www.taitroncomponents.com page 3 of 6 marking information: fig.3-leakage current vs. junction temperature junction temperature (c) leakage current (a) fig.4- typical junction capacitance reverse voltage (v) junction capacitance (pf)
three terminals smd switching rev. a / ah bas21 a /c/s www.taitroncomponents.com page 4 of 6 dimensions in mm (inch) mounting pad layout in mm (inch) sot-23
three terminals smd switching rev. a / ah bas21 a /c/s www.taitroncomponents.com page 5 of 6 packing information: carrier tape dimensions (in mm) note: symbol a0, b0, k0 are determined by the maximum dimensions of the component size. the clearance between the component and the cavity must be within 0.05 mm (0.002??) min. to 0.50 mm (0.02??) max. for 8 mm tape. reel dimensions (in mm) a0 b0 k0 d p0 p product type see note 1.550.5 4.00.1 4.00.1 w e t d1 f p2 sot-23 8.0+0.3/-0.1 1.750.1 0.380.1 1.00.05 3.50.5 2.00.05 a c g t 178.02.0 13.00.5 8.42.0 14.4 max.
three terminals smd switching rev. a / ah bas21 a /c/s www.taitroncomponents.com page 6 of 6 packing quantity information: quantity pcs per inner box pcs per inner carton tr70 tape & reel 3000/reel 240000 inner carton size information: cartoon size 390x270x400 (in mm) how to contact us: us headquarters 28040 west harrison parkway, valencia, ca 91355-4162 tel: (800) taitron (800) 824-8766 (661) 257-6060 fax: (800) taitfax (800) 824-8329 (661) 257-6415 email: taitron@taitroncomponents.com http:// www.taitroncomponents.com taitron components mexico, s.a .de c.v. boulevard central 5000 interior 5 parque industrial atitalaquia, hidalgo c.p. 42970 mexico tel: +52-55-5560-1519 fax: +52-55-5560-2190 taitron components incorporated representa??es do brasil ltda rua domingos de morais, 2777, 2.andar, sala 24 sade - s?o paulo-sp 04035-001 brazil tel: +55-11-5574-7949 fax: +55-11-5572-0052 taitron components incorporated, shanghai representative office metrobank plaza, 1160 west yan? an road, suite 1503, shanghai, 200052, china tel: +86-21-5424-9942 fax: +86-21-5424-9931
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