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About information presented in this cross reference

The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
Please note that this cross reference is based on TOSHIBA's estimate of compatibility with other manufacturers' products, based on other manufacturers' published data, at the time the data was collected.
TOSHIBA is not responsible for any incorrect or incomplete information. Information is subject to change at any time without notice.

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How can I find the resistance values when the photorelay is OFF and when it is ON?

The resistance value when the photorelay is ON is defined in the technical documents as "ON-State Resistance RON". Toshiba has a lineup of products with resistance values in the range of tens of mOhms to tens of Ohms. Note that when it is OFF, nothing is specified as a resistance value. However, it can be found by converting a value of "OFF-State Current IOFF" defined as leakage current into a resistance value (calculated by (VOFF/IOFF). Although it is in a range of several tens of MOhms, you must be aware that as one of the characteristics of semiconductors, the OFF-state current IOFF largely depends on temperature.

Example: Case of photorelay TLP176AM

Coupling characteristics
Electric characteristics