Precision-Built High Temperature
Wire Harness Solutions
As a trusted high temperature wire harness supplier, WellPCB provides reliable heat resistant wiring designed for demanding applications in automotive, industrial and commercial environments.
Our harness products withstand extreme heat, maintain electrical performance and meet strict specification requirements for heavy duty use.
- Engineered with high temp wiring and durable insulation materials
- Built to suit your custom application with fast quote and turnaround
- Proven performance in high temperature environments and harsh conditions
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ISO9001 ISO13485
ISO14001
IATF
16949
IPC-A-610H International
Certification
Fully Automated
AOI Inspection
Durable High Temperature Wire Harness Manufacturing
Our high temperature wiring harness manufacturing supports applications that require stable performance under continuous heat exposure. We build each harness using rugged cable, heat resistant wiring and insulation materials selected to match your specific temperature, electrical and environmental requirements.
Engineered for demanding applications across automotive, industrial, commercial, and aerospace markets, our high temperature cable assemblies use proven materials, controlled manufacturing processes and precise terminations to ensure long service life in harsh environments.
Our High Temperature Wire Harness Capabilities
We evaluate your design, temperature requirements, insulation needs and application conditions to ensure each wire harness meets performance expectations in harsh environments.
We integrate customer-specified cable and heat resistant wiring materials into each harness design, selecting the correct insulation and jacket type based on your application requirements.
Our harness construction methods include secure terminations, protected routing and durable jackets to withstand extreme heat, vibration, and chemical exposure.
Controlled crimping, soldering and routing processes maintain consistency during manufacturing and ensure stable performance at elevated temperatures.
We work with proven high temperature materials, heat resistant insulation types, chemical resistant jackets and connectors rated for industrial and military environments.
Every harness is tested to confirm its ability to withstand harsh environments, mechanical stress and environmental exposure throughout its service life.
Our manufacturing processes adhere to IPC/WHMA-A-620 standards, with capabilities to meet specific automotive (IATF 16949), industrial, and OEM requirements for high-temperature harness performance.
We support fast turnaround for prototypes and full production volumes, delivering custom harnesses for specific project needs and environmental conditions.
Why Choose WellPCB as Your High Temperature Wire Harness Supplier?
As a high temperature wire harness supplier with proven experience in demanding applications, WellPCB delivers reliable performance, precise manufacturing and controlled processes tailored for extreme heat and harsh environments.
Manufactured Based On Your Specs
Each harness is built to your exact temperature rating, insulation type, routing design and application requirements to ensure reliable performance in high temperature environments.
Reliable Sourcing of High-Performance Materials
We source the heat resistant wiring, high temp cable constructions, insulation and components specified in your design, ensuring all materials meet your project and industry standards.
Fast Custom Prototyping
Quick quote turnaround and efficient manufacturing allow you to validate designs, materials and terminations without delays.
Complete Traceability from Start to End
Every material, process step and inspection result is documented, supporting OEM requirements and long term reliability tracking.
Decades of Industry Expertise
Our team has extensive experience producing high temperature cable and wire harness assemblies for automotive, industrial and commercial applications.
Global Delivery
We ship custom harness products domestically and worldwide with reliable packaging and consistent delivery times.
Technical Specifications for High Temp Cable and Wire Harnesses
| Specification | Value / Range |
|---|---|
| Temperature Rating | 125°C to 300°C depending on insulation and jacket material |
| Voltage Rating | Up to 600 V depending on construction |
| Impedence | 50 ohm or application-specific |
| Cable Types | Silicone-insulated wire, polytetrafluoroethylene (PTFE) wire, fiberglass-braided cable, cross-linked polyethylene (XLPE) insulated wire |
| Insulation Materials | PTFE, silicone rubber, fiberglass, XLPE |
| Jacket Materials | Silicone, fiberglass braid, high-temperature protective sleeving |
| Wire Gauge Range | 10 AWG to 28 AWG |
| Termination Methods | Crimped terminals, soldered joints, high temperature connectors |
Types of High Temperature Wire Harnesses We Build
We manufacture a wide range of wire harness solutions designed for heat intensive, chemical resistant and heavy duty applications across multiple industries.
Automotive Wire Harnesses
Built for engine compartments, exhaust zones and under hood areas where heat, vibration and fluid exposure demand durable high temp cable integration and reliable insulation.
Industrial Cables
Integrated into machinery, robotics and equipment that operate under continuous heat conditions and require heat resistant wiring to maintain performance.
Aerospace Heat Resistant Wiring
Engineered for extreme environments using wire, insulation and materials compatible with critical aerospace performance requirements.
Commercial Wire Harnesses
Used in appliances, HVAC systems, lighting and electrical products that operate in elevated temperature environments and require long term reliability.
How to Order Your High Temperature Wire Harness
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
businesses and innovators.
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
Prototype Wire Harness 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.
High Temperature Wire Harness Supplier 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
High Temperature Wire Harness Supplier FAQs
How do I request a quote?
You can submit your design files, drawings, material requirements or a sample for review. Our team provides a quick quote with recommendations based on your application and temperature conditions.
Can you support multi-branch harness designs?
Yes, we can manufacture multi-branch, multi-connector or multi-layer harness structures designed to manage routing, insulation spacing and mechanical protection in elevated temperature conditions.
Do high temperature harnesses require special handling during installation?
In some cases, yes. Certain insulation and jacket materials are optimized for heat but may require specific bend radius, strain relief or routing considerations to ensure long term performance.
Are high temperature wire harnesses suitable for confined or enclosed spaces?
Yes, we select materials with the appropriate heat rating, chemical resistance and airflow considerations to ensure reliable operation inside enclosed housings, engine compartments or industrial equipment cabinets.
Durable, Heavy-Duty Cable Assemblies from a High Temperature Wire Harness Supplier
Get $100 Off Your First Order!
Whether your project requires heat resistant wiring for automotive systems, industrial equipment or commercial products, we deliver high performance high temp cable assemblies manufactured to your exact specifications with dependable quality and fast turnaround.
