dated : 26/04/2006 c r semtech electronics ltd. ( subsidiary of semtech internati onal holdings limited, a company listed on the hong kong stock exchange, stock code: 724 ) UG4A thru ug4d ultrafast efficient plastic rectifier reverse voltage ? 50 to 200 v forward current ? 4 a features ? ultrafast recovery time for high efficiency ? soft recovery characteristics ? excellent high temperature switching ? glass passivated junction mechanical data ? case: molded plastic, do-201ad ? terminals: plated axial leads, solderable per mil-std-750, method 2026 ? polarity: color band denotes cathode end ? mounting position: any absolute maximum ratings and characteristics ratings at 25 o c ambient temperature unle ss otherwise specified. parameter symbols UG4A ug4b ug4c ug4d units maximum repetitive peak reverse voltage v rrm 50 100 150 200 v maximum rms voltage v rms 35 70 105 140 v maximum dc blocking voltage v dc 50 100 150 200 v maximum average forward rectified current 0.375"(9.5 mm) lead length at t l = 75 o c i (av) 4 a peak forward surge current, 8.3 ms single half-sine-wave superimposed on rated load (jedec method) at t l = 75 o c i fsm 150 a maximum forward voltage at 4 a v f 0.95 v maximum reverse current t a = 25 o c at rated dc blocking voltage t a = 100 o c i r 5 300 a maximum reverse recovery time 1) t rr 20 ns maximum reverse recovery time 2) t j = 25 o c t j = 100 o c t rr 30 50 ns maximum recovered stored charge time 2) t j = 25 o c t j = 100 o c q rr 15 30 nc typical junction capacitance 3) c j 20 pf typical thermal resistance 4) r ja 25 o c/w operating junction and storage temperature range t j , t stg -55 to +150 o c 1) reverse recovery test conditions: i f = 0.5 a, i r = 1 a, i rr = 0.25 a. 2) t rr and q rr measured at tester: i f = 4 a, v r = 30 v, di/dt = 50 a/s, i rr = 10% i rm for measurement of t rr . 3) measured at 1 mhz and applied reverse voltage of 4 v. 4) thermal resistance from junction to ambient at 0.375" (9.5 mm) lead length. dimensions in inches and (millimeters) do-201ad 0.052(1.32) 0.048(1.22) 0.210(5.3) 0.190(4.8) 1.0 (25.4) min. 0.375(9.5) 0.285(7.2) 1.0 (25.4) min.
dated : 26/04/2006 c r semtech electronics ltd. ( subsidiary of semtech internati onal holdings limited, a company listed on the hong kong stock exchange, stock code: 724 ) UG4A thru ug4d
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