This part is a kind of semiconductor called 2N1671B.

Function of this product has Silicon Unijunction Transistors.

Manufacturers : Comset

Image and pinout :

Some of the text within the PDF file :

2N1671 – 2N1671A – 2N1671B PN BAR-TYPE SILICON UNIJUNCTION TRANSISTORS They are designed for medium-power switching, oscillator and pulse timing circuits. Package outline is similar to TO-5 except • • • • Highly Stable Negative Resistance and Firing Voltage Low Firing Current High Pulse Curent Capabilities Simplified Circuit Design ABSOLUTE MAXIMUM RATINGS Symbol VB1E VB2E VB1B2 IFRMS IEM PTOT TJ TSTG Ratings Base 1 – Emitter Reverse Voltage Value 2N1671 2N1671A 2N1671B 2N1671 2N1671A 2N1671B 2N1671 2N1671A 2N1671B 2N1671 2N1671A 2N1671B 2N1671 2N1671A 2N1671B 2N1671 2N1671A 2N1671B 2N1671 2N1671A 2N1671B 2N1671 2N1671A 2N1671B 30 Unit V DataShee Base 2 – Emitter Reverse Voltage 30 V Interbase Voltage 35 V RMS Emitter Current [ ... ]

2N1671B PDF Datasheet Download