S9013 NPN Transistor

• The S9013 is a high current fast NPN transistor that can be used for general-purpose switching and amplification. It has a transition frequency of 140MHz. The transition frequency of a transistor is the frequency at which current gain drops to one, beyond which the transistor can no longer amplify signals. This limited bandwidth is due to internal parasitic capacitances.

• The S9013 also has a high collector current rating of 500mA. However, at high currents, the gain drops off rapidly and a base current of up to 50mA is needed to achieve high collector currents. The power dissipation must also be taken into account.

S9013 Equivalent

• 2N2222, 2N5551

Applications

• High-frequency amplifiers
• Switching converters
• High-current drivers