BC109C Transistor TO18 NPN Transistor Philips semiconductors BC109C

Product Overview:

A low-noise, high-gain epitaxial silicon NPN transistor housed in a hermetically sealed metal can package, specifically engineered for low-noise pre-amplifier stages, high-fidelity audio equipment, and sensitive small-signal processing applications.

Core Specifications:

• Manufacturer: Philips Semiconductors (now Nexperia / NXP)

• Package Type: TO-18 (Metal Can, 3-pin)

• Function: Low-Noise NPN Small-Signal Transistor

• Input Channels: 1 Base Control Input (Three-terminal device: Base, Collector, Emitter)

• Control Interface: Current-controlled Base Terminal (High DC Current Gain $h_{FE}$ classification "C" group, typically ranging from 420 to 800)