View 2n3866 datasheet:

DISCRETE SEMICONDUCTORS DATA SHEET 2N3866; 2N4427 Silicon planar epitaxial overlay transistors 1995 Oct 27 Product specification Supersedes data of August 1986 File under Discrete Semiconductors, SC08a Philips Semiconductors Product specification Silicon planar epitaxial 2N3866; 2N4427 overlay transistors DESCRIPTION APPLICATIONS NPN overlay transistors in TO-39 metal packages with the • The transistors are intended for use in output, driver or collector connected to the case. The devices are primarily pre-driver stages in VHF and UHF equipment. intended for class-A, B or C amplifiers, frequency multiplier and oscillator circuits. PINNING - TO-39/1 PIN DESCRIPTION 1 emitter 1 2 base handbook, halfpage 2 3 collector MBB199 3 Fig.1 Simplified outline. QUICK REFE