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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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What are required by safety standards applicable to photocouplers? How are they specified in products?

Isolation voltage、Insulation thickness、Creepage distance、Clearance

Photocoupler package shapes and dielectric strength must be in accordance with safety standards. Therefore, there are restrictions on package design of photocouplers, unlike other semiconductor products.

  • Creepage distance: The shortest distance between two conductors (input-output) along the surface of insulator
  • Clearance: The shortest distance between two conductors in the air
  • Insulation thickness: The minimum thickness of the insulator between two conductors
  • Isolation voltage: Isolation voltage between two conductors. The UL standard specifies this voltage as a voltage at which isolation is not destroyed by application of AC for one minute.

For Toshiba photocouplers, data with values to which these are applied are provided to individual technical documents.