Bipolar (BJT) Transistor NPN 40V 200mA 300MHz 350mW Surface Mount SOT-23
The MMBT3904-TP is an NPN general-purpose bipolar junction transistor (BJT) in a SOT-23 surface-mount package. It is a compact SMD version of the classic 2N3904, designed for switching and low-power signal amplification in a wide range of electronic circuits.
It is commonly used in embedded systems, consumer electronics, and PCB designs where small size and reliable switching performance are required.
Key Features
NPN Bipolar Junction Transistor (BJT)
Suitable for switching and amplification applications
SOT-23 Surface-Mount Package
Compact footprint for high-density PCB designs
Collector-Emitter Voltage (Vceo)
Typically up to 40V
Collector Current
Up to 200 mA continuous
Low Power Operation
Designed for small signal and low-power switching tasks
High Gain (hFE)
DC current gain typically 100–300
Fast Switching Capability
Suitable for digital and pulse applications
Wide Operating Temperature Range
Typically -55°C to +150°C
High Reliability
Stable performance for general-purpose use
RoHS Compliant
Environmentally compliant manufacturing
Typical Applications
Signal switching in digital circuits
LED driving circuits
Small relay or load switching
Sensor interface circuits
General-purpose amplification stages
2N3904 SOT-23
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