2SC5200 NPN power transistor — 230V, 15A, TO-264 — audio amplifier

The 2SC5200 is a high-power NPN silicon transistor originally designed by Toshiba, widely regarded as one of the best output transistors for high-fidelity audio amplifier designs. With a collector-to-emitter voltage of 230V, a continuous collector current of 15A, and a power dissipation of 150W, it delivers clean, high-power audio output with excellent linearity. It is the NPN complement to the 2SA1943 PNP transistor and is typically used in matched pairs for push-pull amplifier output stages.

Key Specifications:

• Type: NPN Silicon Power Transistor
• Package: TO-264 (through-hole, isolated tab)
• Collector-to-emitter voltage (V_CEO): 230V
• Collector-to-base voltage (V_CBO): 230V
• Emitter-to-base voltage (V_EBO): 5V
• Continuous collector current (I_C): 15A
• Peak collector current (I_CP): 30A
• Power dissipation (P_C): 150W (with heatsink)
• DC current gain (h_FE): 55–160 at I_C = 1A
• Transition frequency (f_T): 30 MHz (min)
• Operating junction temperature: −55°C to +150°C
• Complementary pair: 2SA1943 (PNP)

Pinout (TO-264):

• Pin 1: Base (B)
• Pin 2: Collector (C) — connected to metal tab
• Pin 3: Emitter (E)

Applications:

• High-power audio amplifier output stages (push-pull with 2SA1943)
• Class AB and Class A power amplifiers
• DC motor drive circuits
• Switching power supplies
• Linear voltage regulators

Note: Always mount on an adequate heatsink with thermal compound. Use matched h_FE pairs with 2SA1943 for balanced push-pull amplifier stages. Verify authenticity — counterfeit 2SC5200 transistors are common in the market; genuine parts are rated for 150W continuous dissipation.