View mmbt404a datasheet:

MOTOROLA Order this document SEMICONDUCTOR TECHNICAL DATA by MMBT404ALT1/D Chopper Transistor MMBT404ALT1 PNP Silicon Motorola Preferred Device COLLECTOR 3 1 BASE 3 2 EMITTER 1 2 MAXIMUM RATINGS CASE 318–08, STYLE 6 Rating Symbol Value Unit SOT–23 (TO–236AB) Collector–Emitter Voltage VCEO –35 Vdc Collector–Base Voltage VCBO –40 Vdc Emitter–Base Voltage VEBO –25 Vdc Collector Current — Continuous IC –150 mAdc DEVICE MARKING MMBT404ALT1 = 2N THERMAL CHARACTERISTICS Characteristic Symbol Max Unit Total Device Dissipation FR-5 Board,* PD 225 mW TA = 25°C Derate above 25°C 1.8 mW/°C Thermal Resistance, Junction to Ambient R?JA 556 °C/W Total Device Dissipation PD 300 mW Alumina Substrate,** TA = 25°C Derate above 25°C 2.4 mW/°C Thermal Resistance, Junction to