What is the difference between single contact, twin contacts and crossbar twin contacts in the contact mechanism for relays?

ID: FAQE10001E



Contact configurations are classified into three types according to the reliability level: Single contact, Twin contact and Cross-bar Twin contact. Refer to Explanation.


The following table shows typical contacts of our relays.

Typical contacts of relays
  • We have a double (or twin) break contacts type relay in our single contact relays. Double break contacts are suitable for opening and closing large-capacity loads that require breaking capability due to the large gap between the same polarity contacts.
  • Crossbar single contact has the advantage of providing good contact matching even with slight contact misalignment, and is used for relatively small current capacities.
  • The crossbar twin contacts have two contact points and have the advantage of a crossbar shape, making it suitable for opening and closing microloads.

For more information, see Relay Basics:Technoligy.

Quick tips

Select a signal relay (communication) for microload switching.

Product category Relays Signal Relays Power Relays
Classification Selection, Characteristics
Related keywords
  • Signal Relays
  • Power Relays
  • Single Contact
  • Twin Contacts
  • Crossbar Twin Contacts

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