IDC ribbon assemblies
Specify the IDC connector at each end and its permitted cable construction. Insulation-displacement contacts terminate compatible insulated conductors; not every flat cable suits an IDC connector.
TERMINATED ASSEMBLIES — TRADING & SOURCING PARTNER
Custom Flat Ribbon Cable Assemblies
Source a terminated ribbon assembly around your connector, wiring and installation requirements. Zeakka coordinates specification review, supplier quotations and samples for IDC and other specified terminations.
Specify the terminations first, then the cable route
Other or mixed terminations
Identify each end separately when the build uses different connectors, crimp contacts or another termination. Provide the exact part references for project feasibility review.
Folds, splits and cable exit
Add routing instructions to either termination arrangement. Folds, split lengths and strain relief are installation details that can be combined with the chosen ends, rather than a separate connector type.
Check the cable-to-contact fit before choosing IDC
Check two interfaces: the connector must mate with the equipment, and its contacts must accept the selected cable. Connector contact pitch and cable conductor spacing are separate specifications. Neither position count nor the word “ribbon” confirms both.
Review the connector's permitted conductor construction, wire gauge and insulation dimensions, plus the specified termination method and strain relief. Electrical and temperature limits belong to the selected parts and operating conditions; there is no single rating for all ribbon assemblies.
Is your requirement FFC or FPC?
This page concerns insulated-wire ribbon assemblies. Flexible flat cable (FFC) and flexible printed circuits (FPC) have different constructions and mating requirements. A similar width or pitch does not make them interchangeable with IDC ribbon cable.
If your drawing calls for FFC/FPC, identify it in the inquiry so the scope and feasibility can be reviewed separately.
What to include in your assembly request
Start with what you know. Mark open questions so we can clarify the selected cable, connectors and assembly details before arranging a build.
- 01Connector references and mating parts
- List exact connector references at each end and the mating parts. Specify connector contact pitch separately from cable conductor spacing; include drawings or datasheets where available.
- 02Cable construction
- State conductor count and spacing, wire gauge, solid or stranded construction, insulation dimensions and cable specification. For IDC, these must fit the selected contact and its specified cable range; a matching wire gauge alone is not enough.
- 03Pin-to-pin mapping
- Provide a table linking each connector A cavity to its connector B cavity, using the connector drawing's numbering. Mark unused cavities and unconnected conductors separately. Name any additional end or branch and map its connections too.
- 04Finished length and tolerance
- Give the finished assembly length, its measurement datum and the allowed tolerance. Show whether the dimension is measured between connector faces, cable exits or other identified points.
- 05Routing and available space
- Mark folds, splits, branches and strain-relief positions, plus space constraints. State your minimum bend requirement for assessment against the selected build; there is no universal bend radius for every assembly.
- 06Quantity and application
- Share prototype and production quantities, delivery target, application, electrical and temperature requirements, and requested documents. Tell us which details are unknown so the review can identify what needs clarification.
Make connector orientation unambiguous
Add these views to your drawing or photos so both ends can be reviewed against the same connection definition.
- 01
Label ends and viewing direction
Label the connectors A and B. State whether each view looks at the mating face or the wire-entry side. Use the exact connector drawing's cavity numbering; a view from the opposite side can mirror the apparent order.
- 02
Identify pin 1 at both ends
Locate pin 1 from each selected connector's drawing and identify the corresponding cable conductor. A red edge stripe is a cable reference, not proof of pin 1, polarity or a straight-through connection.
- 03
Confirm keying and cable exit
Show the key or latch, cable-exit direction and any fold or strain relief. Turning a connector or folding the cable does not by itself define the electrical mapping: approve the physical arrangement and the pin table together.
Ribbon assembly and connector details
The whole assembly and close-up views show the cable route, red edge stripe and connector entry. Pin numbering and electrical connections still need the selected connector drawings and an approved pin-to-pin table.
For the drawing conventions, see the cable pinout and polarity guide.
Need a shielded ribbon cable assembly?
Submit shielding as a separate construction requirement for review. A standard flat ribbon cable photo or an IDC connector selection does not confirm that a shielded version is available or that it will meet an EMI requirement.
Define the cable and termination
Provide the cable construction or reference drawing, conductor count and pitch, required shield coverage or construction, drain-wire requirement, and the connector at each end. Show where the shield must terminate and identify any enclosure or chassis bond.
Define the installation and acceptance
Include routing space, bend or flex conditions, length datums and the required inspection or test criteria. If an EMC test is required, state its method and acceptance limits; shield continuity alone does not establish system-level EMC performance.
Availability, connector compatibility and the termination method must be confirmed for the proposed construction before quotation or sample approval. Use the ribbon cable specification worksheet to record the base assembly and attach the shielding requirements.
For an unshielded IDC assembly, the same worksheet helps connect your connector references to a defined pin map. Check the IDC ribbon cable orientation guide before using stripe position or connector appearance to infer cavity assignments.
Do you need an assembly or bulk flat ribbon cable?
Choose the page that matches what you are buying; this avoids quoting the wrong scope.
Terminated cable assembly
Choose this page when connectors, pinout, pin-1 orientation, length or routing are part of the requirement.
Bulk flat ribbon cable
Choose bulk cable when you need cable by reel or length without a completed terminated assembly.
Bulk flat ribbon cableReview before sample or production
We use the stated assembly details to clarify the project and compare suitable supplier options.
1. Read the interfaces
Review connector, pitch, conductor count, pinout and orientation.
2. Clarify the cable path
Confirm length, tolerance, fold, split and routing details that affect the finished assembly.
3. Compare project options
Match and compare suitable suppliers based on the confirmed scope.
4. Coordinate the next stage
Coordinate samples, revisions and production follow-up after the specification is confirmed.
Testing and project controls
The approved pin table and assembly drawing define the inspection target. Every assembly receives continuity and short-circuit testing; acceptance limits and any requested records are confirmed for the project.
- Check intended connections against the agreed pin map and detect unintended connections between separate circuits
- Review connector identity, pin-1 reference, cable exit and finished dimensions against the approved drawing
- Pull-force testing is sampled and defined for the project
- Continuity testing does not by itself verify the equipment's polarity, signal performance or operation; state any additional acceptance requirements
Commercial starting points
- Custom harness MOQ is commonly 200–1,000 pieces after project confirmation
- A valid custom project normally has potential order value of at least USD 200
- Quotes are typically provided 1–5 business days after requirements are clear
- Samples are typically 3–7 days after specifications and materials are confirmed; tooling or special materials can take longer
Flat ribbon assembly RFQ questions
Is cable conductor spacing the same as connector pitch?
Not necessarily. Specify cable conductor spacing and connector contact pitch separately. Check both against the selected cable and connector documentation; one value alone does not define a suitable assembly.
Does the same conductor count guarantee an IDC termination?
No. The exact cable construction must be checked against the selected terminal specification and its permitted cable range. Matching conductor count alone is insufficient.
Why do you ask for pin-1 orientation?
Pin-1 and connector orientation affect the finished terminated assembly. Providing them in the drawing, photo or written instruction reduces ambiguity before sampling.
Can a photo be enough to start?
Yes. Send clear photos of both ends, viewing direction, required length and quantity. We can start the review and clarify any unresolved pin mapping before arranging the build.
What is tested?
Every cable assembly receives continuity and short-circuit testing. Pull-force testing is sampled and defined for the project.
Can you quote ribbon cable by itself?
Yes. If you need cable by reel or length without terminations, use the bulk flat ribbon cable page so the request is scoped correctly.
Send the drawing or sample details for a scoped quote
Include both connector references, cable construction, a pin-to-pin table, labeled end views, finished length and quantity. If a detail is unknown, mark it for review rather than guessing.