THROUGH-HOLE SOLDERING
SOLDERED CONNECTORS
board mounted connector
SOLDERED CONNECTORS

Board-mounted connectors provide an electrical/mechanical solution to the problem of providing reliable input and output of power and signals to the printed wiring assembly (PWA). While the incorporation of connectors into a PWA may increase realiability, bulk and weight concerns, their use facilitates testing and field replacement, without the hardwiring of harnesses and cables to the PWA.

Connectors are considered to be components and the mounting and soldering requirements are identical to those imposed on other through-hole components.

connectors mounted on board connectors keyed

PREFERRED

GENERAL REQUIREMENTS

The connector body shall be parallel to and in full contact with the mounting surface. Standoff steps on all leads shall rest on the lands, and lead protrusion shall meet requirements. Mounting features (i.e.: board lock tabs or fasteners) shall be fully inserted and set.

PREFERRED

KEYING

Connectors should be keyed to prevent incorrect mating/interchanging with similar sized/colored connectors.

Best Workmanship Practice

alternative mechanical mounting component with missing hardware

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

NASA WORKMANSHIP STANDARDS
NASA logo Released:
06.27.2002
Revision:
Revision Date:
Book:
6
Section:
6.07
Page:
1




THROUGH-HOLE SOLDERING
SOLDERED CONNECTORS (cont.)
jumper blocks mechanical damage

UNACCEPTABLE

JUMPER BLOCKS

Jumper/selector blocks are not recommended for use in flight applications, without prior written approval. Provisions shall be made to ensure positive locking of jumper to prevent movement/unauthorized removal.

Best Workmanship Practice

UNACCEPTABLE

MECHANICAL DAMAGE

Connectors exhibiting mechanical damage (i.e.: exposed base metal, dings, bent pins, broken mounts, missing EMI inserts, etc,) shall be rejected. Pins exhibiting minor bending may be reworked with approved tooling and processes.

Best Workmanship Practice
















NASA WORKMANSHIP STANDARDS
NASA logo Released:
06.27.2002
Revision:
Revision Date:
Book:
6
Section:
6.07
Page:
2





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