Safety Precautions for All Solid State Relays

Refer to the Safety Precautions section for each SSR for specific precautions applicable to that SSR.

Precautions for Safe Use

OMRON constantly strives to improve quality and reliability. SSRs, however, use semiconductors, and semiconductors may commonly malfunction or fail. In particular, it may not be possible to ensure safety if the SSRs are used outside the rated ranges. Therefore, always use the SSRs within the ratings. When using an SSR, always design the system to ensure safety and prevent human accidents, fires, and social harm in the event of SSR failure. System design must include measures such as system redundancy, measures to prevent fires from spreading, and designs to prevent malfunction.

1. Do not apply voltage or current in excess of the ratings to the terminals of the SSR. Doing so may result in failure or burn damage.

2. Do not use the SSR with loose terminal screws.Doing so may result in burn damage due to abnormal heat produced by the terminals.

3.Do not block the movement of the air surrounding the SSR or heat sink. Abnormal heating of the SSR may result in shorting failures of the elements or burn damage.

4.Follow the Precautions for Correct Use when performing wiring or tightening the screws. If the SSR is used with the wiring or screw tightening performed improperly, burn damage may occur due to abnormal heat generated when the power is being applied.