1.features * plastic package has underwriters laboratory flammability classification 94v-0 * high temperature metallurgically bonded construction * glass passivated chip * capable of meeting environmental standards of mil-s-19500 * for use in high frequency rectifier circuits * fast switching for high efficiency * high temperature soldering guaranteed: 260 c/10 seconds * 0.375" (9.5mm) lead length, 5 lbs. (2.3kg) tension 2.mechanical data case : jedec do-201ad, molded plastic terminals : plated axial leads, solderable per mil-std-750, method 2026 polarity : color band denotes cathode end mounting position : any weight : 0.038 oz., 1.03 g handling precautin :none 3.electrical characteristic maximum ratings & thermal characteristics ratings at 25 c ambient temperature unless otherwise specified. parameter symbol symbol sf31 g sf32 g sf33 g sf34 g sf35 g sf36 g sf38 g unit maximum repetitive peak reverse voltage v rrm 50100150 200 300 400600v maximum rms voltage v rms 3570105140210280420 v maximum dc blocking voltage v dc 50100150200300400600 v maximum average forward rectified current 0.375" (9.5mm) lead length at t a = 55 c i f(av) a peak forward surge current 8.3ms single half sine-wave superimposed on rated load (jedec method) i fsm a maximum dc blocking voltage temperature t a c typical thermal resistance (note 2) r ja c/w operating junction temperature range t j c storage temperature range t stg c electrical characteristics ratings at 25 c ambient temperature unless otherwise specified. parameter symbol symbol sf31 g sf32 g sf33 g sf34 g sf35 g sf36 g sf38 g unit maximum instantaneous forward voltage at 3.0a v f 1.7 v maximum dc reverse current ta = 25 c at rated dc blocking voltage ta = 125 c ir a typical reverse recovery time (note 1) trrns typical junction capacitance at 4.0v, 1mhz cjpf notes: 1. if = 0.5a, ir = 1.0a, irr = 0.25a 2. thermal resistance from junction to ambient at 0.375 (9.5mm) lead length, p.c.b. mounted 10 200 35 30 0.95 sf31g thru sf36g 1.25 3.0 50 150 150 20 C 50 to +150 C 50 to +150 glass passivated junction super fast plastic rectifiers reverse voltage 50 to 600v forward current 3.0a
4.ratings and characteristic curves ( ta = 25 c unless otherwise noted ) sf31g thru SF38G fig. 1 C forward current derating curve fig. 2 C maximum non-repetitive peak forward surge current fig 4. C typical reverse characteristics fig 3. C typical instantaneous forward characteristics fig 5. C typical transient thermal impedance fig 6. C typical junction capacitance a v e r a g e f o r w a r d r e c t i f i e d c u r r e n t ( a ) i n s t a n t a n e o u s f o r w a r d c u r r e n t ( a ) i n s t a n t a n e o u s r e v e r s e c u r r e n t ( a ) j u n c t i o n c a p a c i t a n c e ( p f ) 0 25 50 75 100 125 150 175 1 10 100 0.6 0.8 1.0 1.2 1.4 1.60 20 40 60 80 100 100 10 1.0 0.1 0.01 10 1.0 0.1 0.01 100 3.0 1.5 0 200 100 0 tj = 75 c 8.3ms single half sine-wave (jedec method) tj = 25 c pulse width = 300 s 1% duty cycle ambient temperature, c number of cycles at 60hz instantaneous forward voltage (v)percent of rated peak reverse voltage (%) reverse voltage (v) tj=125 tj=25 C C c / w ) 10 1.0 0.1 100 0.01 0.1 1.0 10 100 t,pulse duration,sec ta=ambient temperature 0.375"(9.5mm)lead lengh 60 hz resistive or inductive load tl=lead temperature with both leads heat sink mounted with length(l) as shown p e a k f o r w a r d s u r g e c u r r e n t ( a ) sf34g~sf34g ---sf35g~SF38G
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