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Sidac neon tube starter

Sidac neon tube starter
The sidac from Motorola is best compared with a triac of which the gate connection is missing. lt switches on whenever the voltage across it exceeds a certain level. The polarity of that potential is immaterial: like a triac, the sidac works equally well with direct and alternating voltages. Furthermore, when the sidac is on, it resembles a short -circuit and remains in that state until the level of the current drops below a certain value (the holding current), where upon it switches off.
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