Test: Use a multimeter on the "Continuity" setting to ensure the back of the transistor is NOT touching the metal heatsink directly. Step 3: Thermal Paste Application
If you cannot find the exact part numbers, you need a pair that meets or exceeds the voltage and current ratings while maintaining a similar frequency response. 1. The Upgrade Choice: 2SC5200 / 2SA1943 persamaan transistor d998 b778 install
Before looking for a replacement, you need to know what you are matching. The D998 and B778 are typically housed in a or TO-247 package. Type: D998 (NPN) / B778 (PNP) Collector-Emitter Voltage (Vce): 120V Collector Current (Ic): 10A Power Dissipation (Pc): 80W Test: Use a multimeter on the "Continuity" setting
If you are in a pinch, these work, but they are generally "slower" (lower fT) than the D998/B778. Cheap and easy to find. The Upgrade Choice: 2SC5200 / 2SA1943 Before looking
A bit more "headroom" than the D998/B778 without requiring major circuit adjustments. 3. The TIP Series: TIP35C / TIP36C