2N574A

Vintage 1950s/1960s industrial PNP germanium power switching transistor manufactured by Honeywell (Minneapolis-Honeywell) featuring a distinctive large stud-mount or tabbed solder-lug metal package, engineered with high current capability for heavy-duty DC-to-DC power converters and switching relays. Equivalents: 2N574, 2N574B, 2N675A, NTE121. Real-Life Examples: Legacy high-power military communications gear, early airborne tracking instrumentation frames, and vintage industrial power conversion grids.