BC108 NPN Metal Transistor 20V 100mA TO-18

BC108 NPN Metal Transistor 20V 100mA TO-18

The BC108 is a silicon planar epitaxial NPN bipolar transistor housed in a TO-18 metal can. It is optimized for low-noise, small-signal applications (audio preamps, input stages, oscillators) and offers stable DC gain and good frequency response in compact through-hole form. The metal package gives better thermal conduction and mechanical robustness compared with plastic packages, which helps reliability in hand-built and professional analog circuits.

Because the BC108 is specified for low currents and modest voltages it is ideal for pre-amplifier stages, driver stages and general purpose signal processing where low noise and predictable gain are important. Its straightforward pinout and long history in vintage and educational designs make it a common choice for repairs, hobby projects and low-power analog designs.

Features:

• Low noise performance suitable for audio and input stages.
• Stable DC current gain with grouped hFE options.
• Metal TO-18 package for improved heat dissipation.
• Good small-signal frequency response.
• Robust mechanical package for through-hole assembly.
• Widely available and easy to source for repairs and prototypes.

Specifications:

Pinout: