ba157 thru BA159 fast switching plastic rectifier voltage - 400 to 1000 volts current - 1.0 ampere features l high surge current capability l plastic package has underwriters laboratory flammability classification 94v - o utilizing flame retardant epo xy molding compound l void - free plastic in a do - 41 package l 1.0 ampere operation at t a =55 with no thermal runaway l fast switching for high efficiency l exceeds environmental standards of mil - s - 19500/228 mechanical data case: molded plastic, do - 41 terminals: axial leads, solderable per mil - std - 202, method 208 polarity: band denotes cathode mou nting position: any weight: 0.012 ounce, 0.3 gram maximum ratings and electrical characteristics ratings at 25 ambient temperature unless otherwise specified. single phase, half wave, 60hz, resistive or inductive load. for capacitive load, derate current by 20%. ba157 ba158 BA159 units maximum recurrent peak reverse voltage 400 600 1000 v maximum rms voltage 280 420 700 v maximum dc blocking voltage 400 600 1000 v maximum average forward rectified current .375"(9.5mm) lead length at t a =55 1.0 a pea k forward surge current 8.3ms single half sine wave superimposed on rated load(jecec method) 30 a maximum forward voltage at 1.0a 1.3 v maximum reverse current t j =25 at rated dc blocking voltage t j =100 5.0 500 a typical junction capacitance (note 1) 12 p f maximum reverse recovery time(note 2) 150 250 ns operating and storage temperature range - 55 to +150 notes: 1. measured at 1 mhz and applied reverse voltage of 4.0 vdc 2. reverse recovery test conditions: i f =.5a, i r =1a, i rr =.25a do - 41
rating and chara cteristic curves ba157 thru BA159 fig. 1 - reverse recovery time characteristic and test circuit diagram fig. 2 - typical instantaneous forward fig. 3 - forward current derating curve characteristics fig. 4 - typical junction capacitance fig. 5 - peak forward surge current vs. reverse voltage
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