Design & Materials
Flat Ribbon Cable Assembly Design Guide
A flat ribbon cable assembly RFQ should identify the cable construction, conductor count and pitch, finished length, split or tear layout, connector or terminal details, orientation, strain relief, and drawing-based inspection or test criteria.
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Decision summary
What to carry into the decision
- Identify ribbon construction, conductor count, pitch, reference edge, split or tear points, and final length.
- Control connector orientation and conductor numbering from one marked view.
- Show where separated conductors route and where strain relief begins so processing does not create an undefined flex zone.
In this guide
- 1Direct answer
- 2Drawing inputs
- 3Processing and inspection table
- 4Connector and routing review
- 5RFQ checklist
- 6Define cable and connector details
- 7Flat‑cable control table
- 8Prevent mirrored or shifted builds
Use the sections in sequence, then turn the open items into one controlled build or sourcing package.
Direct answer
Send the flat-cable part or construction, conductor count, pitch, overall width, finished length, split or tear start and end points, connector or terminal part numbers, orientation, pinout, strain relief, quantity, and inspection or test criteria. Mark the dimension reference edge so the processing layout is unambiguous.
Drawing inputs
Use one drawing or marked reference package to connect the cable construction, processing dimensions, end treatment, and checks.
- Cable part or construction, conductor count, pitch, overall width, conductor identification, and reference edge.
- Finished length, joined length, separated conductor lanes, split or tear start and end points, end preparation, and tolerances.
- Connector or terminal part numbers, accepted equivalents, mating orientation, keying, pinout, labels, and strain relief.
- Appearance, dimensional, continuity, polarity, fit, functional, packing, and record requirements when specified.
Processing and inspection table
Each processing step should have a matching drawing input and inspection point.
| Cable baseline | Identify the supplied cable before setting split, tear, or cut dimensions. |
|---|---|
| Split and tear layout | Show which conductors remain joined, which are separated, and where each section begins and ends. |
| Cut and end dimensions | State the finished length, end-preparation dimensions, orientation, tolerances, and measurement references. |
| Connector interface | List the connector or terminal, pinout, mating direction, strain relief, and any no-substitution requirement. |
| Verification | Define appearance, dimensions, continuity, polarity, connector fit, or other checks with pass/fail limits. |
Connector and routing review
Identify the actual flat-cable construction and connector or terminal data so pitch, conductor count, orientation, and end treatment can be checked together.
Show the intended bend area, separated-conductor routing, and strain-relief location when they affect the assembly. If a functional or durability check is required, supply the method, fixture, and pass/fail limits.
RFQ checklist
A compact RFQ package should let quotation, processing, assembly, and inspection use the same references.
- Latest drawing revision and marked sample photos when the cable exit or connector orientation is difficult to describe.
- Cable identification, connector and terminal data, pinout, dimensions, tolerances, labels, and accepted equivalents.
- Quantity, sample requirement, inspection frequency, test method, record format, packing, and delivery destination.
- Any open item that still needs confirmation before sample or production planning.
Define cable and connector details
Use the supplied component data, drawing, and test method to specify the cable construction, connector series, required documents, and finished-assembly checks.
Flat-cable control table
Keep processing and inspection dimensions on the same revision.
| Cable | Part or construction, conductor count, pitch, width, conductor identification, and reference edge. |
|---|---|
| Processing | Final length, joined and separated zones, tear or split limits, cut geometry, and end preparation. |
| Connector | Housing and terminal identity, pin 1, mating orientation, keying, pinout, and strain relief. |
| Verification | Appearance, dimensions, continuity, polarity, fit, function, labels, packaging, and records. |
Prevent mirrored or shifted builds
Mark conductor 1 and the dimensional reference edge in every relevant view. Use the same convention in the wiring table, connector view, fixture, inspection record, and any reference photo.
