Motorola 2N554  
Written by Accutron on 2017-02-09  

Introduced in the late 1950s, the Motorola 2N554 is a germanium PNP power transistor in a gold-plated TO-3 package. The 2N554 was originally intended for automotive applications, and was also the transistor featured in the first published design for a transistorized model train throttle.

Motorola 2N554 germanium PNP power transistor.

2N554 transistor, underside construction.

This article is part of the [Discrete Semiconductors] exhibit.

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