BF422 NPN Silicon Transistor Descriptions PIN Connection • High voltage application • Monitor equipment application C Features B B C E • Collector-Emitter voltage : VCEO=250V • Complementary pair with BF423 E TO-92 Ordering Information Type NO. Marking Package Code BF422 TO-92 BF422 Absolute maximum ratings Symbol Ratings Unit Collector-Base voltage VCBO 250 V Collector-Emitter voltage VCEO 250 V Emitter-base VEBO 5 V Collector current IC 100 mA Collector dissipation PC 625 mW Junction temperature Tj 150 °C Storage temperature Tstg -55~150 °C Characteristic Electrical Characteristics Characteristic Symbol Collector-Emitter breakdown voltage BVCEO Test Condition IC=1mA, IB=0 Min. Typ. Max. Unit 250 - - V Collector cut-off current ICBO VCB=200V, IE=0 - - 100 nA Emitter cut-off current IEBO VEB=5V, IC=0 - - 100 nA DC current gain hFE VCE=20V, IC=25mA 50 - - - VCE(sat) IC=30mA, IB=5mA - - 0.6 V - 100 - MHz - 1 - pF Collector-Emitter saturation voltage Transistor frequency Collector output capacitance fT Cob VCE=20V, IC=10mA, f=100MHz VCB=20V, IE=0, f=1MHz KSD-T0A035-000 1 BF422 Electrical Characteristic Curves Fig. 1 hFE - IC Fig. 3 fT - IC Fig. 2 VCE(sat) - IC Fig. 4 COb - VR KSD-T0A035-000 2 BF422 Outline Dimension KSD-T0A035-000 3 BF422 The AUK Corp. products are intended for the use as components in general electronic equipment (Office and communication equipment, measuring equipment, home appliance, etc.). Please make sure that you consult with us before you use these AUK Corp. products in equipments which require high quality and / or reliability, and in equipments which could have major impact to the welfare of human life(atomic energy control, airplane, spaceship, transportation, combustion control, all types of safety device, etc.). AUK Corp. cannot accept liability to any damage which may occur in case these AUK Corp. products were used in the mentioned equipments without prior consultation with AUK Corp.. Specifications mentioned in this publication are subject to change without notice. KSD-T0A035-000 4