The 2SA1011 or A1011 is a PNP power transistor, it is commonly used in audio amplifier driver stages, low frequency power amplification and general purpose power switching circuits. It comes in the TO-220 package, delivering high current capability and good low-frequency response. This article shares the Pinout, Features and Equivalent Transistors list for replacement.
2SA1011 Pinout
Hold the transistors numbering facing to you and the pins are pointing downward. After that count the pins from left to right side, so the pin configuration will be,
| Pin Number | Pin Name |
|---|---|
| 1 | Base |
| 2 | Collector |
| 3 | Emitter |
2SA1011 Features
- Collector–Emitter Voltage (VCEO): -160V
- Collector–Base Voltage (VCBO): -180V
- Emitter–Base Voltage (VEBO): -6V
- Collector Current (IC): -1.5A
- Peak Collector Current: -3A
- Power Dissipation (PC): 25W
- Transition Frequency (fT): 15 MHz
- DC Current Gain (hFE): 60–320
Complementary Pair
The 2SC2344 / C2344 NPN Transistor is the Complementary transistor for 2SA1011 PNP Transistor.
Equivalent Transistors for Replacement
- 2SA1013
- 2SA1015 (lower power)
- 2SA1386
- A761
- TIP42C (popular, but lower frequency)
- BD244C (similar voltage rating)
- KTA1011 (same device by different manufacturer)
Where to Use 2SA1011?
The 2SA1011 PNP transistor is is used in Audio amplifier output stages, Power amplifier driver stages, Voltage regulators and Low frequency power switching. Because of its high voltage and current rating, it is well suited for high power audio amplifiers especially in Class AB amplifier circuits.
Applications
- Power audio amplifiers circuits.
- Amplifier driver stages.
- Relay drivers and power control.
- DC to DC converters.
- Power regulators.
- Inverter and UPS circuits.
