Custom Cable Assembly Manufacturing in Mexico
Shelmex is a custom cable assembly manufacturer in Mexico. We build cable assemblies and cordsets to your drawings and specifications: a single cable or a bundle of conductors, cut, terminated, and tested as one finished part ready to install.
We cover cable manufacturing and assembly end to end, so you work with a single cable manufacturer in Mexico from drawing to tested part. We serve data, power, communication, and industrial equipment brands across the United States and worldwide, so you get a build made for your product instead of a generic part that almost fits.
What a Cable Assembly Is
A cable assembly is a cable, or a group of conductors, enclosed in a single jacket or sleeve and finished with connectors or terminals on the ends, built to carry power or signals from one point to another. It is usually a point-to-point run.
A wire harness, by contrast, is a branched network that routes many wires and connectors through a whole product. If your build branches to several connection points, see our wire harness service.
Cable Assembly Types We Build
Multi-conductor cable assemblies
Several conductors in one jacket for power and signal runs.
Power cords and power cable assemblies
Line cords and power runs that carry primary current to the equipment.
Data and communication cable assemblies
Coaxial and RF cable assemblies
Semi-rigid coaxial and RF runs for high-frequency signals.
Fiber optic cable assemblies
Ribbon cable assemblies
Don't See Your Cable Here?
Industries and Products We Serve
We build cable assemblies for a range of industries, led by data and communication equipment:
- Data and servers: power and data runs for servers, data centers, and networking hardware.
- Communications and networking: communication and signal links for connected equipment.
- Industrial equipment: durable assemblies for machinery and equipment in demanding settings.
- HVAC and climate systems: power and control runs for air conditioning and climate equipment.
- Home and commercial appliances: cordsets and internal cable runs for appliances.
- Solar and renewable energy: power and interconnect cables for solar and renewable energy equipment.
Cable Assembly Capabilities and Specifications
Every cable assembly is cut, terminated, and tested in house to the specification on your drawing:
- Wire gauge and conductors: from fine AWG 32 wire up to 535 MCM power cable, in single or multi-conductor builds.
- Cable types: multi-conductor, power, ribbon, semi-rigid coaxial, and fiber optic cable.
- Jacket and insulation: PVC, Teflon, Kynar, X-Link, Fiberglass, or DMD (Dacron/Mylar/Dacron), selected to suit your application.
- Cut length and termination: cables cut and stripped to the length on your drawing, then crimped or soldered to the connectors you specify.
- Testing: every assembly is continuity tested before it ships.
- Quality and compliance: new launches run through APQP, PFMEA, SPC, and PPAP, under ISO 9001, C-TPAT, SAT IVA/IEPS, and IMMEX.
Why Brands Choose Shelmex for Cable Assemblies
- Built to your print or your sample: send a drawing, or a cable you already use, and we build to match it.
- Your lengths, your quantities: small, specialized batches or full production runs, built to your numbers.
- One partner from cut to test: cutting, termination, and testing all happen under one roof at our plant in Mexico.
- Close to the United States: our plant sits about two hours from the Texas border, which keeps lead times short.
Frequently Asked Questions
Can you copy a cable we already use?
Yes. Send us a sample or reference cable along with any drawings you have, and we will build to match it, confirming the cable, connectors, and lengths with you before production.
Do you build coaxial and fiber optic cable assemblies?
Yes. Along with multi-conductor, power, and ribbon assemblies, we build semi-rigid coaxial and fiber optic cable assemblies, among others. If your cable is not listed, send the spec and we will confirm.
Can you handle small runs as well as volume production?
Yes. We take small, specialized batches and scale up to full production runs, so the build fits your program at every stage.
How quickly can cables reach the United States?
Shipping from northern Mexico keeps transit to U.S. customers short, and USMCA rules simplify cross-border trade. We also ship to customers worldwide.