2N929

The 2N929 is a classic NPN bipolar junction transistor engineered for general-purpose amplification and switching applications. It delivers reliable performance in low-power circuits, offering steady gain and durable operation across a variety of designs. Collector-Emitter Voltage: 40 V, suitable for moderate voltage applications. Collector Current Rating: up to 0.8 A, supporting robust switching and amplification tasks. Power Dissipation: 625 mW, enabling safe handling of moderate power levels under typical operating conditions. DC Current Gain (hFE): 40–300, providing flexibility for different gain requirements in amplifier circuits. Transition Frequency (fT): ≈150 MHz, offering adequate high-frequency response for certain RF and signal applications. Compared to contemporary general-purpose transistors, the 2N929 remains competitive for low to moderate power tasks. Its proven silicon construction yields consistent electrical characteristics that simplify circuit design and reduce variation between units. The combination of robust voltage and current ratings with a wide current gain range gives designers flexibility for both switching and analog amplification roles. Engineering highlights include dependable switching behavior, a broad hFE range for adaptable biasing, and moderate transition frequency for signal amplification in applications where extreme high-frequency performance is not required. These attributes make the 2N929 a versatile choice for retrofit work and new designs that demand balanced performance and reliability.