The RCA 40294 is an ultra-high-reliability silicon NPN epitaxial planar transistor, engineered for low-noise amplifier, mixer, and oscillator applications. It operates effectively at frequencies up to 500 MHz in common-emitter configurations and up to 1200 MHz in common-base configurations. Key Features High Gain-Bandwidth Product: Minimum transition frequency (f T ) of 1000 MHz. Low Noise Figure: Maximum noise figure (NF) of 4.5 dB at 450 MHz. High Power Gain: Minimum power gain (G pe ) of 12.5 dB at 450 MHz for a circuit bandwidth of 20 MHz. High Power Output: Minimum output power (P o ) of 30 mW at 500 MHz. Low Collector-to-Base Time Constant: Maximum r b’ C c of 15 ps. Package and Construction The transistor is housed in a hermetically sealed JEDEC TO-72 metal can package, ensuring durability and reliability. All active elements are insulated from the case, with a fourth lead available for grounding in applications requiring device shielding. Maximum Ratings Collector-to-Base Voltage (V CBO ): 30 V max. Collector-to-Emitter Voltage (V CEO ): 15 V max. Emitter-to-Base Voltage (V EBO ): 2.5 V max. Collector Current (I C ): 40 mA max. Power Dissipation (P T ): With heat sink: 300 mW max. at case temperatures up to 25°C; derate at 1.72 mW/°C above 25°C. In free air: 200 mW max. at ambient temperatures up to 25°C; derate at 1.14 mW/°C above 25°C. Operating and Storage Temperature Range: -65°C to +200°C. Lead Temperature (During Soldering): 265°C max. at distances ? 1/32 inch from seating surface for 10 seconds max. Applications The RCA 40294 is specifically processed, preconditioned, and tested to meet the stringent requirements of critical aerospace and military applications. Its high reliability and performance make it suitable for ultra-high-frequency (UHF) applications in these demanding fields. This transistor is electrically and mechanically similar to the RCA 2N2857 but undergoes additional rigorous processing to ensure enhanced reliability for critical applications.