2SC4793 is a specific NPN bipolar junction transistor (BJT) — commonly used in power and amplifier circuits. 

📌 What It Is

• A silicon NPN transistor designed for power and amplifier applications, especially driver stages and power audio amplifiers. 

• Often used together with a complementary PNP transistor like the 2SA1837 (you asked about that earlier). 

📊 Key Specs (Typical)

• Polarity: NPN silicon transistor

• Maximum Collector‑Emitter Voltage (Vᴄᴇᴏ): ~230 V 

• Maximum Collector Current (Iᴄ): ~1 A 

• Power Dissipation: ~2 W (some sources note higher in datasheets for junction case ratings) 

• DC Current Gain (hFE): ~100–320 (depends on operating point) 

• Transition Frequency (fT): ~100 MHz — good for moderate‑speed switching and RF/audio applications 

• Package: Through‑hole TO‑220F / TO‑220‑3 style 

• Operating Temp: ~‑55 °C to +150 °C