Precision Cable Assembly & Wire Harness Manufacturing
HMLV Specialist | 300% Inspection | 5-15 Day Samples | In-House Lab

Our Company
Romtronic is a premier ODM/OEM factory based in China, specializing in precision cable assemblies and wire harnesses. With 29 years of industry expertise, we provide high-quality interconnect solutions precisely tailored to your technical requirements.
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 get in touch with 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 precision 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, DVI, SATA, IEEE 1394, RCA, RS232, VGA, and various other cable configurations. We deliver tailored solutions for automotive, trailer, medical device, appliance, robotics, and heavy-duty industrial machinery applications.
Why Choose Us?
Certified for High-Compliance Industries: IATF 16949 | ISO 13485 | EN 45545 | USB4 TID.
300% Inspection & Zero Defects
Every product undergoes rigorous multi-stage testing, ensuring zero defects and uncompromising quality for high-reliability applications.
Independent, Fully Equipped Laboratory
Our in-house lab validation includes TDR, salt spray, tensile, andbending tests for advanced signal integrity and durabilityverification.
Small Quantity Orders Accepted (HMLV)
Specializing in High-Mix Low-Volume production. Flexible MOQs start from just 10 pieces or a total order value over $100.
28Y OEM/ODM Experience
Partners with global brands like Siemens, Bosch, and Samsung.
Professional Engineering Team
12 experienced engineers proficient in CAD and Pro-E drafting.
Advanced Automation Equipment
Laser wire stripping and fully automated production lines.
Service Response within 24 Hours
24/7 online support and rapid technical expert feedback.
Expert Sales Team
18 sales professionals with 10+ years of global industry experience.
Operational Flexibility
Operations designed to meet diverse customer needs and business models.
What Our Customer Say
As a customer of custom automotive wire harnesses from Romtronic, my experience has been outstanding thanks to their commitment to prompt responses and professional service, especially from Emily. The structure and detailing of their products are well thought out and precise.
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.

