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SSR exhibits longer 'survivability' in harsh environment

Posted: 13 Jun 2008 ?? ?Print Version ?Bookmark and Share

Keywords:solid-state relay? PCB? MOSFET?

Clare Inc., a wholly owned subsidiary of IXYS Corp., recently released a fast-actuating, current-limiting, optically isolated solid-state relay (SSR). The 1-Form-A, normally open CPC1560 SSR incorporates active current limit and thermal shutdown circuitry for improved survivability in harsh environments. Applications include general industrial control and instrumentation switching applications as well as peripherals, security and medical equipment.

The CPC1560 is designed to pass regulatory voltage surge requirements when provided with appropriate overvoltage protection circuitry. The device provides 3750Vrms of I/O isolation. The OptoMOS SSR is designed specifically for environmentally demanding AC or DC applications, where PCB space is at a premium and additional power supplies are not available.

The 60V CPC1560 also features fast turn-on of loads up to 600mA DC in a DC-only configuration or 300mA rms in an AC/DC configuration. Fast turn-on (100?s) and turn-off (400?s) is accomplished with the use of an external charge storage capacitor that provides the necessary charge required by the internal switching MOSFETs. "The CPC1560 charges this capacitor through bootstrap diodes from the load voltage, thereby alleviating the need for an additional power supply," Clare said.

- Gina Roos

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