HG 2SC2166

The HG 2166 (or HG 2SC2166) is a silicon NPN epitaxial planar type transistor primarily designed for RF power amplifiers in HF band mobile radio applications. It is a direct replacement for the discontinued Mitsubishi 2SC2166 and is commonly used in CB and 10-meter radios.
Key Specifications
According to datasheets from hgsemi.com the HG 2SC2166 has the following maximum ratings and characteristics:
Parameter Rating Units
Collector-Base Voltage (VCBO) 75 V
Collector-Emitter Voltage (VCES) 75 V
Collector-Emitter Voltage (VCEO) 35 V
Emitter-Base Voltage (VEBO) 5 V
Collector Current (IC) 4 A
Collector Power Dissipation (PDISS) 12.5 W (@Tc=25℃)
Operating Junction Temperature (Tj) 175 ℃
Storage Temperature Range (Tstg) -65 to 175 ℃
Power Gain (GP) 13.8 (min) dB (@ 6W/27 MHz/12V)
Applications and Features
Primary Use: The transistor is designed for 3 to 4 watts (or up to 6 watts) output power amplifiers in HF band mobile radio applications.
Radio Compatibility: It is a common replacement part for RF circuits in popular CB radios from manufacturers like Cobra, Galaxy, Uniden, RCI, and President.
Design: It features an emitter ballasted construction for high reliability and good performance.
Package Type: It comes in a TO-220 similar package which is convenient for mounting.
Replacement Options
The original Mitsubishi 2SC2166 is no longer manufactured and can be difficult to find in genuine form. The HG 2SC2166 is an OEM replacement.

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