Medium voltage photorelay for industrial applications

Posted By : Enaie Azambuja
Medium voltage photorelay for industrial applications

Toshiba Electronics Europe has released a photorelay in a small 4-pin SO6 package, for factory automation and other industrial applications including semiconductor test, security systems and building automation. The TLP176AM incorporates MOSFETs fabricated with the latest U-MOS IX process. It has a rated on-state output terminal voltage (VON) of 60V and a constant on-state current (ION) of 0.7A with pulse operation up to 2.1 A. At 3.75 kVrms, the device provides higher ESD immunity than the current TLP172AM.

The new photorelay is upwards compatible with the earlier TLP172A, in terms of both performance and footprint. As the TLP176AM is normally-open, it is suitable for use as a replacement for 1-Form-A mechanical relays.

By replacing mechanical relays with photorelays system reliability is improved and the space required for relays and relay drivers is reduced. As TLP176AM has a rated operating temperature between -40°C and 110°C it is suitable for industrial applications and easier to allow a temperature margin in system-level thermal design.

The device offers fast switching times of 3 ms (tON) and 0.5 ms (tOFF) with an isolation voltage of 3750 Vrms. It is housed in a small 4-pin SO6 package and fully approved to UL1577 for safety-critical applications.

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