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Microelectronic relays

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article image International Rectifier’s PVT212 microelectric relays

INTERNATIONAL Rectifier (IR) has introduced the new PVT212 microelectronic relay (MER). The relay delivers 75% lower on-resistance and up to 37.5% higher load current capacity than similar devices.

The primary applications for the PVT212 include load switching in industrial controls, telecom line switching and power control and distribution in computer peripherals and instrumentation.

The PVT212 photovoltaic relay is a single-pole, normally-open solid-state relay that can replace many electromechanical and reed relays to improve reliability. It uses IR’s HEXFET power MOSFETs as the output switch, driven by an integrated circuit photovoltaic generator. The output switch is controlled by radiation from a light emitting diode, which is optically isolated from the photovoltaic generator.

The PVT212 offers high load current capacity of up to 550mA in ac-dc mode or up to 825mA in dc-only mode at up to 150V. At the same time, it provides extremely low on-resistance of 0.75W maximum in ac-dc mode and 0.25W maximum in dc-only mode.

Like all microelectronic relays offered by IR, the PVT212 delivers bounce-free operation, eliminates contact wear and tear and has as much as 1,000 times longer life compared to reed and electromechanical relays.

In addition, the PVT212 has 4,000V RMS input-to-output isolation and an electro-static discharge (ESD) tolerance of 4,000V using human body model.

The PVT212 is packaged in a 6-pin, moulded DIP (dual-in-line package) with either thru-hole (PVT212) or surface mount, gull-wing leads (PVT212S). The new MER is available in plastic shipping tubes (50 each) or on tape-and-reel (750 each).

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