Molex Cable Assembly for
High-Performance Products
WellPCB delivers complete molex cable assembly services including testing and customization using genuine Molex connectors for robust performance in demanding environments.
Get fast turnaround, flexible order volumes and global delivery from our advanced manufacturing facilities.
- ISO 9001 & IPC/WHMA-A-620 Class 3 certified cable assembly manufacturing
- Full DRC checks and custom wire processing
- Sourced from authorized distributors to guarantee genuine Molex connectors
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ISO9001 ISO13485
ISO14001
IATF
16949
IPC-A-610H International
Certification
Fully Automated
AOI Inspection
Molex Cable Assemblies for Reliable Electrical Connectivity
WellPCB manufactures custom molex cable assembly solutions to strict IPC/WHMA-A-620 Class 3 quality standards. Our team builds each assembly using genuine Molex connectors sourced through authorized distributors, guaranteeing a high level of performance and traceability.
We support a wide range of Molex series (including Micro-Fit, Mini-Fit Jr., Mega-Fit, and SL) for both low-voltage signal and high-current power applications. Whether you’re developing a compact embedded system or a rugged industrial controller, our team helps customize your cable assembly from concept through production, delivering reliability, configurability and mechanical retention.
Our Molex Cable Assembly Capabilities
We assemble Molex cable assemblies using genuine Molex parts from various families.
These connectors support board-to-board, wire-to-board and wire-to-wire configurations across a wide range of power and signal applications.
Supports 28 to 10 AWG wire sizes with automatic stripping, crimping and insertion. Every molex cable assembly undergoes crimp force detection to meet IPC/WHMA-A-620 Class 3 standards, ensuring mechanical strength and electrical reliability.
Our Molex cable assemblies accommodate continuous power loads up to 23A and low-voltage signal lines down to 5V. Mixed-load designs are supported through multi-pin configurations for compact, high-current circuits.
We provide heat-shrink, braid and overmolded strain relief options for mechanical protection and environmental sealing. Printed or color-coded labeling supports traceability, orientation and field servicing.
Every assembly undergoes 100% continuity and insulation resistance testing. Optional EMI shield validation, pull-force testing and hipot inspection are available for regulated sectors including medical and industrial.
No MOQ custom cable builds support fast prototyping, while automated tooling allows us to scale to thousands of units per batch.
Rapid lead times range from 3 weeks (prototypes) to 5 weeks for bigger orders, depending on volume and complexity.
We only use Molex terminals and housings from authorized suppliers like Digi-Key, Arrow and Avnet. Full lot traceability and component verification reports are provided with each build.
All cable assemblies ship with labeled packaging and serialized test records. Compliance with ISO 9001, RoHS, and industry standard IPC/WHMA-A-620 Class 3 is documented, with optional PPAP and FAI available.
Why Choose WellPCB for Molex Cable Assemblies?
We have 15+ years of cable assembly experience and consistently exceed industry quality standards. Since we started, we’ve produced over 1 million cable assemblies.
One-Stop Manufacturing
From design checks to final testing, WellPCB handles every stage of your Molex cable assembly under one roof.
This vertical integration eliminates supplier handoffs, reducing risk, lead time and cost for every custom cable or Molex cable assembly project.
Genuine Molex Components
Every assembly uses traceable, authorized Molex connectors. We guarantee no counterfeit parts.
This means consistent electrical performance, mechanical integrity and full compatibility with datasheets and OEM mating parts.
ISO & IPC Certified Facilities and Processes
Our factories are certified to ISO 9001 standards and our team follows Class 3 workmanship standards from IPC/WHMA-A-620.
Whether your application is industrial, automotive, medical or something else, we meet the reliability expectations for your specific project.
Fast Turnaround
With in-house tooling and high-speed crimp lines, we can deliver Molex cable assemblies in as little as 2 weeks for prototypes.
Standard production cycles range from 4 to 5 weeks depending on your batch size and the availability of the necessary parts.
Easily Contactable Support
Our engineers help select the ideal connector, determine proper wire gauge and avoid mismatch or over-spec issues.
We also have a knowledgeable customer support team who are always happy to help.
Global Delivery
We ship to North America, Europe, Australia, and Asia.
With optimized logistics and transparent tracking, your assemblies arrive on time, whether you’re building in Shenzhen or scaling in Stuttgart.
Technical Specifications for Molex Cable Assemblies
| Specification | Value / Range |
|---|---|
| Rated Voltage | Up to 600V (depending on series) |
| Operating Temperature Range | -40°C to +105°C |
| Mating Durability | 30 to 500+ insertions (series-dependent) |
| Supported Wire Gauges | 28 AWG to 10 AWG |
| Supported Wire Styles | UL 1007, 1015, 1061, 1569 |
| Insulation Resistance | ≥ 1000 MΩ at 500V DC |
| Dielectric Withstanding Voltage | ≥ 1500V AC/minute |
| Contact Resistance | ≤ 10 mΩ (initial) |
Note that values vary by connector family. Datasheets for each Molex series are available upon request.
Molex Connector Families We Support
WellPCB supports a wide variety of Molex connector families, making it easy to select the right one to match your application’s electrical, mechanical or environmental requirements.
These families cover both power and signal roles, offering design flexibility across industries including automotive, industrial and consumer electronics.
Mini-Fit Jr. (4.2 mm pitch):
High-density power up to 9.0A per circuit when using 16 AWG wire. A versatile choice for compact system power distribution and embedded applications. Available with polarization and latching.
Micro-Fit 3.0:
A compact 3.0 mm pitch connector supporting 5.0A per circuit. Ideal for applications requiring space savings without sacrificing current handling. Frequently used in consumer and medical devices.
Mega-Fit
Delivers up to 23A per contact with low contact resistance. This Molex connector is used in power-intensive designs such as motor drives and distribution harnesses. Its rugged build supports long-term performance in industrial environments.
Nano-Fit
A low-profile, high-current (up to 6.5A) connector with integral TPA (Terminal Position Assurance) and 2.5 mm pitch size. Excellent for dense interconnect layouts in compact equipment where space is at a premium.
KK Series
Widely used for board-to-wire signal routing. Available in single- or dual-row formats, it’s an industry standard in control panels and embedded cable assemblies with moderate current needs.
Sabre Series
Designed for harsh conditions, with 7.5 mm pitch and 18A per circuit. Features include high vibration resistance, EMI shielding options and secure locking.
Applications of Molex Cable Assemblies
Molex cable assemblies are used across industries where compact size, high current capacity and dependable data and power transmission are required. We support custom cable assemblies depending on volume, environment and design intent.
Automotive
Used in infotainment units, battery harnesses, lighting systems and more. Molex’s vibration-resistant designs and TPA features are ideal for in-vehicle applications where durability and secure contact are important.
Industrial
Connect motor controllers, sensors, PLCs and HMIs in rugged environments. These assemblies support high-current delivery and shielded communication lines in factories, robotics and automation systems.
Medical
Enables low-profile, high-reliability cable routing in imaging systems, diagnostic equipment and patient monitoring devices. Molex cable assemblies offer performance under repeated connection cycles and sterilization protocols.
Consumer Electronics
Used in power supplies, display modules, wearables and home automation products. Molex’s compact connectors accommodate tight space constraints and low-voltage data paths for modern devices.
Telecom
Integrates into base stations, routers and backhaul networks. High-speed, high-density cable configurations with EMI protection support continuous operation and stable signal integrity in telecom infrastructure.
Molex Connector Selection Guide
Choosing the right Molex connector depends on several factors. Our engineers will help you select the right one based on your needs.
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| Current & Voltage: | Mini-Fit Jr. and Mega-Fit support higher power and Micro-Fit or Nano-Fit fit compact or low-current systems. |
| Mating Cycles: | Select high-cycle versions for maintenance-heavy applications. |
| Class 3 Compliance: | Required for aerospace, medical and military builds. We build to IPC/WHMA-A-620 Class 3, which defines workmanship standards for high-reliability assemblies. |
| Wire Gauge: | 28 to 10 AWG range supported. Thicker wire accommodates higher current, but increases bend radius and space requirements. |
| Environmental Conditions: | Use sealed or overmolded types for dust, vibration, or outdoor exposure. |
How to Order Your Molex Cable Assembly
Submit Your Design
Send us your design details (Drawing or Detailed Specifications).
Get a Fast Quote
Once your design and specs are received, a fast quote will be sent to you within 24 hours.
Confirm Order & Make Payment
When the quotation is approved, please send the PO or order confirmation, we will proceed with the production after receiving your payment.
Arrange Production & Inspection
Before production, our technical team will review all details of the drawing/specs again. If everything is OK, the order will start. We'll keep you updated throughout the manufacturing process. After the production is completed, the products will be 100% inspected.
Packaging & Delivery
When completed, your order will be carefully packed and shipped to you, with shipping documents and tracking information provided.
WellPCB is trusted by millions of
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Why Choose WellPCB as Your Wire Harness Manufacturer?
WellPCB stands out among USA wire harness manufacturers by delivering superior quality, advanced solutions, and unmatched reliability. With years of experience serving global markets, WellPCB has earned a reputation as one of the top wire harness manufacturers in the USA.
WellPCB specializes in custom wire harnesses for complex electronic and industrial applications. You can order these assemblies with $100 off using our special offer—delivering high-quality, tailor-made harnesses at competitive rates for your most demanding projects.
Hommer Zhao
Founder and Chief Editor – Hommer Zhao
Welcome! I’m Hommer Zhao, the founder and Chief Editor of WellPCB. With years of experience in the PCB industry, I’m committed to making sure our content is both accurate and helpful. We’re proud to serve a growing community of over 4,000 customers worldwide, and our goal is to provide you with the best resources and support. Your satisfaction is our top priority, and we’re here to help you every step of the way!
Jesse Holland
Technical Manager – Jesse Holland
Hi, I’m Jesse Holland, an Engineer and Technical Manager at WellPCB. With years of experience in PCB design and engineering, I’m here to ensure that every project we work on meets the highest technical standards. I lead our team, focusing on precision and innovation, collaborating closely with clients to provide tailored solutions and expert guidance. Whether you’re facing a complex design challenge or need advice on technical aspects, I’m here to ensure your project is a success from start to finish.
Nathan Jensen
Purchasing Manager – Nathan Jensen
Hi, I’m Nathan Jenson, the Purchasing Manager at WellPCB. I’m responsible for sourcing the best materials and components to ensure our products meet the highest quality standards. With my extensive experience in procurement, I work closely with suppliers to secure reliable and cost-effective solutions while maintaining strong relationships to support our operations. I aim to ensure every project runs smoothly by providing the resources needed to deliver on time and to your satisfaction.
Emma
Sales Manager – Emma
Hey, I am Emma, sales manager at WellPCB. I studied electronic science and technology at university and have served customers for PCB and PCB Assembly service for several years.

I enjoy communicating with customers and our technicians to solve problems, and customers always say, "It's great to have you onboard".

It is my pleasure and honour to be helpful. Contact me now, and you'll know.
Bella and Cassiel
Sales Representatives – Bella and Cassiel
We’re Bella and Cassiel, your dedicated sales representatives at WellPCB. With our extensive knowledge of the PCB industry, we’re here to provide exceptional service and support. We take the time to understand your unique needs and are always ready to offer tailored solutions and advice. Whether you need product recommendations, assistance with your orders, or simply have a question, we’re here to ensure your experience is smooth and seamless at every step.
Mandy and Wendy
Sales Representatives – Mandy and Wendy
We’re Mandy and Wendy, your friendly sales representatives at WellPCB. Passionate about helping our customers, we bring a wealth of experience in the PCB industry to provide you with the best solutions and service. We take pride in building strong relationships with our clients, understanding their specific needs, and offering personalised support to ensure their satisfaction. Whether you’re looking for advice, product information, or assistance with any part of your order, we’re here to make your experience as smooth and efficient as possible.
Our Team
Our skilled engineers and technicians bring expertise and precision to every PCB assembly project. Committed to quality, efficiency, and innovation, our team ensures every order meets the highest UL, IPC, ROHS & REACH standards, delivering reliable solutions tailored to your needs.
- Founder and Chief Editor – Hommer Zhao
- Technical Manager – Jesse Holland
- Purchasing Manager – Nathan Jensen
- Sales Manager – Emma
- Sales Representatives – Bella and Cassiel
- Sales Representatives – Mandy and Wendy
Molex Cable Assembly Case Studies
PCB Assembly
The picture shows an HDMI-to-DVI cable with USB power. It can be used to connect HDMI-enabled devices (such as laptops and TV boxes) to DVI-equipped monitors and other home appliances.
Advantages:
- •Strong Compatibility: Allows connection between devices with different interface standards, expanding their use cases.
- •Stable Transmission: Provides stable video signal transmission, minimizing interference and loss during signal transmission.
- •Convenient Power Supply: No need to find a separate power source, making it more convenient to use.
PCB Assembly
The picture shows an HDMI-to-DVI cable with USB power. It can be used to connect HDMI-enabled devices (such as laptops and TV boxes) to DVI-equipped monitors and other home appliances.
Advantages:
- •Strong Compatibility: Allows connection between devices with different interface standards, expanding their use cases.
- •Stable Transmission: Provides stable video signal transmission, minimizing interference and loss during signal transmission.
- •Convenient Power Supply: No need to find a separate power source, making it more convenient to use.
PCB Assembly
The picture shows an HDMI-to-DVI cable with USB power. It can be used to connect HDMI-enabled devices (such as laptops and TV boxes) to DVI-equipped monitors and other home appliances.
Advantages:
- •Strong Compatibility: Allows connection between devices with different interface standards, expanding their use cases.
- •Stable Transmission: Provides stable video signal transmission, minimizing interference and loss during signal transmission.
- •Convenient Power Supply: No need to find a separate power source, making it more convenient to use.
Molex Cable Assembly Client Feedback
As an R&D manager, I have had an outstanding experience working with WELL-PCB. For many years, our company has entrusted them with the production, assembly, and programming of the boards developed in our R&D unit, and they have consistently exceeded our expectations.
Hamid Reza Moshayedi
R&D Manager
Their work is very impressively perfect. Today, when they check our company PCB board after assemble. They found a fake short point which many engineers has never found in the past years. But that is just designed so. The PCB board quality is excellent. Their service is also excellent.
MikeZ
My friend introduced WellPCB to me, the first try, a little look forward to. I ordered a 47*72 10ps PCB, and I can’t wait to receive my PCB. So I used expedited service and received my PCB in three days. I tested and soldered the PCB, Quality is really good, silkscreen, plating also great.
Warren Cliton
Molex Cable Assembly FAQs
What is Molex, and how long have they been in the industry?
Molex is a US-based connector and cable manufacturer founded in 1938, with over 70 years of innovation in interconnect technology. Their components are now used worldwide in automotive, telecom, medical and consumer applications. WellPCB works with certified Molex parts to deliver legacy-backed performance.
Do you support custom assembly lengths and breakout configurations?
We manufacture to any required length, pinout or wire breakout. Whether you’re building a single drop-in replacement or a complex multi-branch loom, we can accommodate your specific application.
What types of drawings or files do you support for Molex cable assembly orders?
Do you offer digital configurators or datasheet libraries for Molex components?
While we don’t host our own configurators, we reference Molex’s official datasheets and guides to select the best-fit parts. You’ll also receive engineering validation before any build begins to confirm connector series, wire gauge and assembly construction.
Molex Cable Assembly By Trusted Professionals
Get $100 Off Your First Order!
Molex is a global leader born in the USA, with decades of proven success in building high-performance cable assemblies for regulated industries. WellPCB delivers these trusted components with localized support and fast shipping, now with a $100 discount on your first order.
