Summary
Low Current, High Performance NPN Silicon Bipolar Transistor
Description
Hewlett-Packard’s AT-30511 and AT-30533 are high performance NPN bipolar transistors that have been optimized for maximum fT at low voltage operation, making them ideal for use in battery powered applications in wireless markets. The AT-30533 uses the 3 lead SOT-23, while the AT-30511 places the same die in the higher performance 4 lead SOT-143. Both packages are industry standard, and compatible with high volume surface mount assembly techniques.
Source title
AT-30511 Datasheet(PDF) - Agilent(Hewlett-Packard)