What are the possible causes of malfunction for a relay?

ID: FAQE10088E



If the contact does not operate (conduct electricity) even though voltage is applied to the coil, it is possible that the relay drive system (coil) is defective or the contact that opens and closes the load is defective.


The causes of the malfunction may be the following problems with the drive or contact.

Causes of the malfunction

Regarding to malfunction examples and countermeasure for relays, refer to The SOLUTIONS [General-purpose Relay Edition].

Quick tips

If it is difficult to analyze the conduction failure caused by environmental factors, contact us for analysis. When removing the relay from the PCB, be careful not to bend the terminals, cause shock, or cause damage with solder heat.

Product category Relays Signal Relays Power Relays
Classification Trouble shootings
Related keywords
  • Signal relay
  • Power relay
  • Malfunction
  • Drive system(coil)
  • Contact

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