BUL128D-B Transistor Datasheet

NPN BJT | ST

NPNTO-220High Power
VCEO
-
Ic Max
400V
Pd Max
4A
Gain
-65℃~+150℃
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Quick Reference

The BUL128D-B is a NPN bipolar transistor in a TO-220 package, designed for high power applications. It supports a breakdown voltage of - and continuous collector current of 400V. This component is widely used in NPN switching and linear amplification circuits.

Technical Specifications

ParameterValueDescription
ManufacturerSTOriginal Manufacturer
PackageTO-220Physical mounting form factor
VCEO-Breakdown voltage
IC Max400VCollector current
Pd Max4APower dissipation
Gain-65℃~+150℃DC current gain
Frequency10Transition frequency
VCE(sat)-Saturation voltage
Vebo500uAEmitter-Base voltage
Temp70WOperating temperature range

Direct Replacements & Alternatives

Part NumberTypePackageVCEOIcPd
BD243CG NPN TO-220 - 100V 6A
ST13009 NPN TO-220 - 700V 12A
View all TO-220 NPN Transistors ›