_"---_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ File No. 304
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Solid State Division
Power Transistors
40542 40543
SILICON N·P·N, MOLDED SILICONE·PLASTIC 1I0MHAXIAL·BASE TRANSISTORS
RCA-40542 and -40543 are hometaxial**-base silicon n-p-n power traDsis~ors employing a new plastic package with formed leads which can be inserted into a TO·3 socket.
These types differ in voltage ratings and in the current at which the parameters are controlled. The 40542 is intended as a complement to p-n-p type 40051 in complementry-symmetry output stages of audio-amplifier circuits. The 40543 was designed specifically for amplifier applications.
*Data for type 40051 appears in File No. 67. ·*"HOMETAXIAL" was coined by RCA from two words,
"homogeneous" and "axial," to provide a name for a transistor structure in which the base region comprises homogeneous resistivity silicon material in the axial direction {emitter...to-collector}. Hometaxial types provide greater power-han.