General Application of Connectors

Precautions for Proper Connector Use

1. Ambient operating temperature range

The ambient operating temperature range includes the self temperature rise due to energization of the connector. This is described below.

Ambient operating temperature + Self-temperature rise of connector ≤ Upper temperature range

2. Ambient storage temperature range

The ambient storage temperature range is the condition when storing the packed connector. The ambient operating temperature range is applied when storing, without energizing, the connector which has been mounted on a printed circuit board.

3. The specifications of the wire and printed circuit board to be used for the connector

Please use wires and printed circuit boards whose wire specifications (size, material etc.) and printed circuit board specifications (substrate thickness, board through hole specifications, etc.) conform to the connector to be used. In addition, please use appropriate tools and equipment for connecting.

4. Connector insertion / removal

  • Insert and remove connectors straight
  • Insert deeply
  • If there is a lock, please make sure that the lock is secure
  • When removing please make sure that it has been unlocked

There are some other points to be aware. Please refer to the catalog and specifications before use.

Failure of Connector

Connector Failures

There are three major failures of the connector.

1. Initial failure

Connectors have been broken before being used as applications.

  • Contact failure due to excessive fluxing or adhesion of cleaning liquid on contact
  • Contact failure due to solidified substrate coating liquid adhered to the contact

2. Accidental failure

Sudden failure mainly due to mechanical stress

  • Dropping / hitting products
  • Corrupt connector due to pulling cable
  • Corrupt connector due to reverse insertion

3.Friction failure

Failures that occur while using as application

  • The plating on the contact part is peeled off due to insertion and removal exceeding the limit and become eroded, and this causes conduction failure.
  • By using the connector in a high temperature environment exceeding the limit to guarantee the performance, the contact portion of the contact wears out, and then conduction failure occurs due to insufficient contact pressure caused by lowering of a insertion and removal force.
  • Lock breaks down due to friction caused by locking more than the number of times of limit to guarantee the performance.

Please observe the precautions to avoid these failures.

Life of Connector

Life of Connector

Contact failures and breakages are judged as the life of the connector, but regarding such a lifetime, connectors do not have life by operation time.

The connectors' life is judged by mechanical deterioration, environmental deterioration, and electric deterioration, etc. .
However, in either case, the judgment will change depending on which condition is judged as life.
It depends on the environment in which the connector is used, the deteriorated state, the required level for the connector of the application being used, and so on.

Life of the connector itself is judged by contact resistance and the number of insertion and removal since the connector is a mechanical part (connection part) and is not a part that operates something (an active part) or a part that operates with something (a passive part).

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