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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.
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What precautions should be taken when replacing mechanical relays with triac couplers?

A triac coupler is a semiconductor device; even when it is OFF, leakage current IDRM occurs, and especially at a high temperature, a larger leakage current occurs. Whether or not this can cause malfunction to a device or load at the second-half state must be checked. Also, even if it is equal to or less than the maximum rating, if a suddenly rising voltage (dV/dt) is applied, malfunction may occur. Care should be taken.
Refer to Toshiba Application Note "Triac couplers-basic properties and application design", sections 10.7 to 10.9.