The 2SA1012 or A1012 is a PNP BJT transistor, it commonly used in audio amplifier driver stages, voltage regulation circuits and general low frequency power switching applications. In this article describes the pinout, features, specifications, complementary pair and Equivalent transistor for replacement.
Pinout of 2SA1012 Transistor
The 2SA1012 generally comes in a TO-220 and TO-252 packages. Both the packages has the same pin configurations. To check the pinout of this transistor, hold the transistor metal side in the back side and pins pointing down side. Then count the pin from left to right as,
- Pin 1 is Base
- Pin 2 Collector and it connected to the metal tab
- Pin 3 is Emitter
Features and Specifications
- Type: PNP
- Collector-Emitter Voltage (VCEO): -50V
- Emitter-Base Voltage (VEBO): -5V
- Collector-Base Voltage (VCBO): -60V
- Collector Current (Ic): -5A
- DC Current Gain (hFE): 70 to 240.
- Power Dissipation (PT): 25W (maximum)
- Transition Frequency (ft): 60MHz
- Package Type: TO-220 or TO-252 packages.
Complementary Pair
You can use 2SC2562 NPN complementary pair for 2SA1012 PNP transistor, depending on circuit design.
Equivalent Transistor for Replacement
- 2SA1015 (lower power but usable for small signal tasks)
- A733 or 2SA733
- 2SA1266
- TIP32C (for higher power applications)
- BD140
Applications
- Pre driver and driver stages in power audio amplifiers circuit.
- Push pull amplifier designs (paired with NPN 2SC series).
- Motor and relay control.
- Audio equipment repairs and replacements.
- Voltage level control and small power regulation.
