Selenium rectifier

Selenium rectifiers used in 1950s MADDIDA computer.

Selenium rectifier from 1960s. Each plate is 1 inch square.

A selenium rectifier is a type of metal rectifier, invented in 1933. They were used in power supplies for electronic equipment, and in high current battery charger applications until they were superseded by silicon diode rectifiers in the late 1960s. The arrival of the alternator in some automobiles was the result of compact, low cost, high current silicon rectifiers. These units were small enough to be inside the alternator case, unlike the selenium units that preceded silicon devices.

单词	Selenium rectifier
释义	Selenium rectifier 英语百科 Selenium rectifier A selenium rectifier is a type of metal rectifier, invented in 1933. They were used in power supplies for electronic equipment, and in high current battery charger applications until they were superseded by silicon diode rectifiers in the late 1960s. The arrival of the alternator in some automobiles was the result of compact, low cost, high current silicon rectifiers. These units were small enough to be inside the alternator case, unlike the selenium units that preceded silicon devices.
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