Vishay announced the release of two new series of 4-pin, low AC input current optocouplers with phototransistor output. The VOS628A and VOS627A are offered in the compact SSOP-4 mini-flat package with a double-moulded construction, which saves more than 60% on board space compared to a DIP-4 package and claims to improve high-voltage performance compared to co-planar constructions from other suppliers.
With low AC input currents of ±1 mA (VOS628A) and ±5 mA (VOS627A), the devces are designed for programmable logic controllers, industrial control systems and office automation applications. They protect equipment users from electrical shocks and protect microprocessors within these systems from being damaged by voltage spikes.
The VOS628A and VOS627A are available with a variety of current transfer ratio (CTR) ranges from 50% to 600%. They feature GaAs infrared emitting diodes that are optically coupled to a silicon planar phototransistor detector. Their SSOP-4 package provides a 3750 VRMS isolation voltage rating, a half lead pitch of 1,27 mm, and creepage and clearance distance of 5 mm.
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