qst4.pdf datasheet:

QST4 Transistors Low frequency amplifier QST4 External dimensions (Unit : mm) Application Low frequency amplifier 2.8Driver 1.6 Features 1) A collector current is large. 2) VCE(sat) : max. -250mV At IC=-1.5A / IB=-30mA Each lead has same dimensionsROHM : TSMT6 Abbreviated symbol : T04QST4 Equivalent circuit Absolute maximum ratings (Ta=25C) Parameter Symbol Limits Unit(6) (5) (4)Collector-base voltage VCBO -15 VVCEO -12 VCollector-emitter voltageEmitter-base voltage VEBO -6 VIC -3 ACollector currentICP -6 A1500 mW2Power dissipation PC31.25 W (1) (2) (3)Junction temperature Tj 150 CRange of storage temperature Tstg -55 to +150 C1Single pulse, PW=1ms2Each Termminal Mounted on a Recommended3Mounted on a 25mm25mm t 0.8mm Ceramic substrate Electrical characteristics (Ta=25C) Paramet

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