SOLDERLESS (PRESS-FIT) CONNECTORS
The use of high-density, high pin-count connectors (i.e.: backplane connectors, PC104, etc.) in multi-layer boards presents a technical challenge to the designer. The close pin geometries and thermal mass make reliable soldering extremely difficult.
Press-fit technology offers a "solderless" alternative, with spring-pin terminations that produce a reliable electrical termination with a gas-tight, mechanical fit to the plated-through hole.
Press-fit technology shall not be specified for flight applications without prior NASA approval.
PREFERRED
GENERAL REQUIREMENTS
The connector has been properly installed, parallel to, and in full contact with the mounting surface. Pins are fully inserted, even, and meet minimum protrusion requirements. Mounting features (i.e.: board lock tabs or fasteners) have been fully inserted and set.
PREFERRED
KEYED
Connectors should be keyed to prevent incorrect mating/interchanging with similar sized/colored connectors.
Best Workmanship Practice
ACCEPTABLE
ALTERNATIVE MECHANICAL MOUNTING
Connectors not supplied with a locking tab or fastener system shall be secured with staking compound. Staking compound shall not be applied over conductive surfaces.
Best Workmanship Practice
UNACCEPTABLE
MISSING MOUNTING/CONNECTING
HARDWARE
Missing mounting/connecting hardware can interfere with the proper mating of the connector.
Best Workmanship Practice
