A1015 PNP Transistor ( Pack of 3 )

Technical Details

• Power Dissipation ($P_C$): 400mW.

• Emitter-Base Voltage ($V_{EBO}$): -5V.

• Operating Junction Temperature: -55°C to +150°C.

Prototyping and Engineering Tips from Robogears

• Pinout Sequence: CRITICAL: When viewing the flat side of the A1015 with the leads pointing down, the pinout is Emitter (1), Collector (2), and Base (3). Note that this often differs from European or American standard transistors like the BC557 or 2N3906; always verify your PCB layout to prevent reverse connection.

• PNP Switching Logic: Since this is a PNP transistor, it is "turned on" when the base voltage is lower than the emitter voltage. In common switching circuits, the emitter is connected to the positive rail, and the base is pulled toward ground (through a resistor) to activate the load.

• Audio Pair Balancing: For high-quality stereo amplifiers, try to match the gain (hFE​) of the A1015 with its NPN counterpart (C1815). Transistors from the same gain group (marked with letters like O, Y, or G) will provide better circuit symmetry and lower distortion.

• Thermal Considerations: While rated for 400mW, it is best to operate the device below 60% of its maximum capacity for long-term reliability. If the case becomes hot during use, check for excessive collector current or consider a larger package like TO-126.

• Base Protection: Always include a series resistor (typically 1kΩ to 10kΩ) at the base to limit current. Directly connecting the base to a low-impedance voltage source can cause thermal runaway and permanent junction failure.

Package Includes

• 3 x A1015 PNP Audio Frequency Amplifier Transistors

Disclaimer: Product images are shown for illustrative purposes only. The exact markings on the transistor body or the manufacturer's logo may vary slightly between manufacturing batches, but all technical specifications and A1015 performance standards remain as described.

Safety Warning: Do not exceed the -150mA collector current limit. When driving inductive loads such as small relays, always use a Flyback Diode in parallel with the load to prevent high-voltage spikes from damaging the transistor's junction.