MMBTA42NPN high-voltage transistor12 October 2023Product data sheet1. General description NPN high-voltage transistor in a small SOT23 Surface-Mounted Device (SMD) plastic package. PNP complement: MMBTA92 2. Features and benefits • Low current (max. 100 mA) • High voltage (max. 300 V) 3. Applications • Telephony • Professional communication equipment 4. Quick reference data Table 1. Quick reference dataSymbolParameterConditionsMinTypMaxUnit VCEO collector-emitter open base - - 300 V voltage IC collector current - - 100 mA hFE DC current gain VCE = 10 V; IC = 10 mA; Tamb = 25 °C 40 - - 5. Pinning information Table 2. Pinning informationPinSymbolDescriptionSimplified outlineGraphic symbol 1 B base 3 C 2 E emitter 3 C collector B E 1 2 SOT23 sym123 Document Outline 1. General description 2. Features and benefits 3. Applications 4. Quick reference data 5. Pinning information 6. Ordering information 7. Marking 8. Limiting values 9. Thermal characteristics 10. Characteristics 11. Package outline 12. Soldering 13. Revision history 14. Legal information Contents