2N4957 is a PNP silicon BJT (NOS GOLD LEADS)

The 2N4957 is a PNP silicon BJT engineered for high-frequency performance in VHF and UHF ranges. Its low noise figure and minimum 17 dB power gain at 450 MHz make it ideal for RF amplifiers, oscillators, and mixers. Encased in a hermetic TO-72 metal can, it supports up to -30 V collector-emitter voltage and continuous collector current of -30 mA, with a power dissipation of 200 mW. With a transition frequency between 1.2 and 1.6 GHz, it delivers reliable, low-noise signal amplification in demanding radio frequency applications.