Custom Cable Assembly & Wire Harness Manufacturer
28 Years ODM/OEM Expertise | Rapid Custom Wiring Harness Factory | One-Stop Solutions | Replies Within 12 Hours

Our Company
Romtronic is a professional cable assembly and wire harness manufacturer based in China. It specializes in OEM and ODM production services.
Our factory is certified to ISO 9001, ISO 13485:2016, IATF 16949 and other industry standards; you can view our certifications here.
Our custom wire harnesses and cable assemblies are sold in over 80 countries, including the United States, Germany, Japan, the United Kingdom, and more. Our commitment to quality and service has helped us build a loyal customer base worldwide.
Please contact us if you need custom cable assembly or wire harness services. Our team is available seven days a week to assist you.
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Our Products
As a specialist in custom cable assemblies and wire harnesses, we are your top choice for high-quality solutions across various commercial and industrial sectors. Our product offerings include DisplayPort, LVDS, USB, HDMI, DVI, SATA, IEEE 1394, RCA, RS232, VGA, and various other cable configurations. We deliver tailored solutions for applications in automotive, trailers, medical devices, appliances, robotics, and heavy-duty industrial machinery.
Why Choose Us?
The capacity of custom production
With 28 years of OEM/ODM production experience, our factory partners with some of the world’s leading brands, including Siemens, Mettler Toledo, Bosch, Samsung, RAFI, TE, Amphenol, and more.
Accept small quantity orders
We accept small custom orders for various cable assemblies and wire harnesses, with a minimum order quantity of 10 pieces or a total order value of over $100.
Conformity and delivery rate 100%
All our products undergo rigorous testing to ensure 300% inspection and zero defects. We guarantee 100% on-time delivery and have a late penalty agreement.
Operational Flexibility
Our flexible operations are designed to accommodate all business models, enabling us to meet our customers’ diverse needs.
Professional Sales Team
We have 17 sales professionals with over 10 years of experience serving OEM and ODM customers in the global cabling industry. Working with us will be easy and seamless, ensuring a comfortable experience.
Service Response
Professional Engineering Team
Our engineering team, equipped with CAD and Pro-E drawing capabilities, provides end-to-end support—from concept and design to wiring and final mechanical assembly.
Automation Equipment
Independent Laboratory
Our factory features a fully equipped lab with various testing equipment, including a TDR network analyzer, salt spray tester, cable bending tester, tensile tester, LCR tester, and more. ➙View our independent laboratories.
What Our Customer Say
Als Kunde von maßgeschneiderten Auto-Kabelbäumen bei Romtronic war meine Erfahrung ausgezeichnet, dank ihrer Verpflichtung zu schnellen Reaktionen und der Professionalität des Service, insbesondere durch Emily. Die Struktur und Detaillierung der Produkte sind durchdacht und präzise.
Anne hathaway
Happy working with Romtronic. Their medical wire harnesses are consistently impeccable, and they deliver with impressive speed. In a demaniding medical dield, it’s rare to find such a company that perfectly balances workmanship and efficiency.
Steffen Neumann
For my industrial automation projects, Romtronic cables are perfect! Their team is highly responsive and consistently delivers top-notch, marine-grade products. Every one of my projects benefits from their fast, dependable, and high-quality solutions.
Connor Pasley
Romtronic has always been our go-to for automotive wiring harnesses, and they’ve never let us down. Their products are meticulously crafted, reflecting exceptional attention to detail. As a leading automotive supplier, their professionalism and reliability truly set them apart.
Marie Caron
Contact Us
Feel free to contact us by filling out the form to request a quote for cable assemblies or wire harnesses or to schedule a factory tour. You can also take a live video tour of our company at your convenience.
