CURRENT 1.0 Ampere VOLTAGE 400 to 1000 Volts BA157 THRU BA159 Features * Plastic package has Underwrites Laboratory Flammability Classification 94V-0 * Fast switching speed * Diffused junction * High current capability * High temperature soldering guaranteed : 250/10 seconds, 0.375"(9.5mm) lead length, 5 lbs.(2.3kg) tension. DO-41 0.107(2.7) 0.080(2.0) DIA. 1.0(25.4) MIN. 0.205(5.2) 0.166(4.2) Mechanical Data * Case : JEDEC DO-41 molded plastic body * Terminals : Plated axial lead solderable per MIL-STD-750, method 2026 * Polarity : Color band denotes cathode end * Mounting Position : Any * Weight : 0.012 ounce, 0.34 gram 1.0(25.4) MIN. 0.034(0.9) 0.028(0.7) DIA. Dimensions in inches and (millimeters) 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 by 20%) Symbols BA157 BA158 BA159 Units Maximum recurrent peak reverse voltage VRRM 400 600 1000 Volts Maximum RMS voltage VRMS 280 420 700 Volts Maximum DC blocking voltage VDC 400 600 1000 Volts Maximum average forward rectified current Rload at TA=50 I(AV) 1.0 Amp Peak forward surge current 10ms single half sine-wave superimposed on rated load at Rload at TA=25 IFSM 35.0 Amps Maximum instantaneous forward voltage at 1.0A VF 1.3 Volts Maximum DC reverse current at rated DC blocking voltage TA=25 IR 5.0 A Maximum reverse recovery time (Note 1) Trr Max. thermal resistance Typical junction capacitance (Note 2) Operating junction and storage temperature range 150 250 ns RJA 60 /W CJ 6.0 pF TJ TSTG Notes: (1) Test conditions: IF=0.5A, IR=1.0A, Irr=0.25A. (2) Measured at 1MHz and applied reverse voltage of 4.0 Volts. -65 to +150 RATINGS AND CHARACTERISTIC CURVES BA157 THRU BA159 FIG.2-TYPICAL FORWARD CURRENT DERATING CURVE FIG.1-TYPICAL INSTANTANEOUS FORWARD CHARACTERISTICS 1000 1.25 500 10mm x t yp 50 IF AVERAGE FORWARD CURRENT (A) 100 10mm 1 ma IF INSTANTANEOUS FORWARD CURRENT(mA) Tj=25 +VF- IF 10 5 0.8 0.75 R-Load C-Load 0.50 1 0.25 0.5 0 0.4 0.8 1.2 1.6 0 25 50 75 FIG.3-TYPICAL THERMAL IMPEDANCE 150 175 FIG.4-TYPICAL JUNCTION CAPACITANCE 10 90 80 Tj=25 f=1MHz 8 x ma 60 CJ DIODE CAPACITANCE(pF) RQJA THERMAL RESISTANCE JUNCTION AMBIENT(/W) 125 LEAD TEMPERATURE( ) VF INSTANTANEOUS FORWARD VOLTAGE DROP (V) typ 40 6 4 ty p 2 20 l l 1 1 0 100 10 20 I,LEAD LENGTH (MM) 30 35 10 100 VR REVERSE VOLTAGE (V) 1000