MMBTA42 Datasheet & Equivalents

NPN SOT-23 General Purpose DIOTEC
VCEO
300V
Ic Max
500mA
Pd Max
250mW
hFE Gain
80
📄 View PDF Datasheet 🛒 Buy from LCSC

Quick Reference

The MMBTA42 is a NPN bipolar junction transistor in a SOT-23 package, manufactured by DIOTEC. It supports a breakdown voltage of 300V and continuous collector current of 500mA. It is widely used in switching and amplification circuits.

Technical Specifications

ParameterValueDescription
ManufacturerDIOTECOriginal Manufacturer
PackageSOT-23Physical mounting
Transistor TypeBJTBipolar Junction Transistor
CategorySingleConfiguration
Collector-Emitter Voltage (VCEO)300VMax breakdown voltage
Collector Current (Ic)500mAMax current handling
Power Dissipation (Pd)250mWMax thermal limit
DC Current Gain (hFE)80Base signal amplification ratio
Transition Frequency (fT)50MHzMax operating frequency
Saturation Voltage (VCEsat)-Voltage drop when fully ON
Emitter-Base Voltage (Vebo)-Max emitter-base breakdown
Collector Cutoff Current-Leakage current when OFF
Operating Temp-55℃~+150℃Safe junction temperature range

Equivalent Transistors & Alternatives

PartTypePackageVCEOIChFEPdManufacturer / Datasheet
FMMT497TA NPN SOT-23 300V 500mA 80 500mW
DIODES 📄 PDF
S-MMBTA42LT1G NPN SOT-23 300V 500mA 60 350mW
JSMSEMI 📄 PDF
MMBTA42-7-F NPN SOT-23 300V 500mA 40 300mW
DIODES 📄 PDF
MMBTA42Q-7-F NPN SOT-23 300V 500mA 40 300mW
DIODES 📄 PDF
LMBTA42LT1G NPN SOT-23 300V 500mA 25 225mW
LRC 📄 PDF
MMBTA42LT1G NPN SOT-23 300V 500mA 25 225mW
onsemi 📄 PDF
SMMBTA42LT1G NPN SOT-23 300V 500mA 25 225mW
onsemi 📄 PDF
SMMBTA42LT3G NPN SOT-23 300V 500mA 25 225mW
onsemi 📄 PDF
CMPTA42E TR PBFREE NPN SOT-23 350V 500mA 50 350mW
Central 📄 PDF
DN350T05-7 NPN SOT-23 350V 500mA 30 300mW
DIODES 📄 PDF
MMBT6517BEC NPN SOT-23 350V 500mA 200 200mW
EIC 📄 PDF
STR1550 NPN SOT-23 500V 500mA 100 500mW
ST 📄 PDF
NPN Bipolar Transistors High-Voltage NPN BJTs SOT-23 NPN BJTs