A42 Datasheet & Equivalents
NPN
SOT-89
General Purpose
Guangdong Hottech
VCEO
300V
Ic Max
300mA
Pd Max
500mW
hFE Gain
300
Quick Reference
The A42 is a NPN bipolar junction transistor in a SOT-89 package, manufactured by Guangdong Hottech. It supports a breakdown voltage of 300V and continuous collector current of 300mA. It is widely used in switching and amplification circuits.
Technical Specifications
| Parameter | Value | Description |
|---|---|---|
| Manufacturer | Guangdong Hottech | Original Manufacturer |
| Package | SOT-89 | Physical mounting |
| Transistor Type | BJT | Bipolar Junction Transistor |
| Category | Single | Configuration |
| Collector-Emitter Voltage (VCEO) | 300V | Max breakdown voltage |
| Collector Current (Ic) | 300mA | Max current handling |
| Power Dissipation (Pd) | 500mW | Max thermal limit |
| DC Current Gain (hFE) | 300 | Base signal amplification ratio |
| Transition Frequency (fT) | 50MHz | Max operating frequency |
| Saturation Voltage (VCEsat) | 200mV | Voltage drop when fully ON |
| Emitter-Base Voltage (Vebo) | 5V | Max emitter-base breakdown |
| Collector Cutoff Current | 250nA | Leakage current when OFF |
| Operating Temp | - | Safe junction temperature range |