View 2sc2240 datasheet:

2SC2240 TOSHIBA Transistor Silicon NPN Epitaxial Type (PCT process) 2SC2240 Low Noise Audio Amplifier Applications Unit: mm The 2SC2240 is a transistor for low frequency and low noise applications. This device is designed to lower noise figure in the region of low signal source impedance, and to lower the pulse noise. This is recommended for the first stages of Equalizer amplifiers. • Low noise: NF = 4dB (typ.) RG = 100 ?, V = 6 V, I = 100 µA, CE C f = 1 kHz : NF = 0.5dB (typ.) R = 1 k?, V = 6 V, I = 100 µA, G CE C f = 1 kHz • Low pulse noise: Low 1/f noise • High DC current gain: h = 200~700 FE • High breakdown voltage: V = 120 V CEO Maximum Ratings (Ta = = 25°C) = = Characteristics Symbol Rating Unit JEDEC TO-92 Collector-base voltage VCBO 1