Do you need UL qualification for your conformal coating?

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What is UL and how does it relate to conformal coating?

UL stands for Underwriter Laboratories. They are a global safety certification body for consumer electronics.

When a conformal coating states that it has a UL qualification, it means that the material has been independently tested by UL in one of their laboratories and passed a particular standard.

UL carry out the testing. It is independent. There is no self-certification available.

UL qualified conformal coatings are used in all areas of electronics protection including aerospace, industrial controls, automotive and telecommunication sectors.


What UL standard tests are used with conformal coating?

For conformal coating materials there are two standard tests typically used.

These are UL94 and UL 746E.

UL 94 Standard for Safety of Flammability of Plastic Materials for Parts in Devices and Appliances testing.

UL 94 is a plastic material flammability standard. It classifies plastics according to how they burn in various orientations and thicknesses.

UL 94 measures a conformal coating material’s ability to extinguish or to spread the flame once a test specimen has been ignited.

This ability is ranked as a classification as below.

Classifications

For conformal coatings the coupons are normally tested Horizontally (HB).

Tests are normally conducted on coupons of the minimum approved thickness with different types of laminate.

The conformal coating thickness range also is normally specified.

  • V-2 burning stops within 30 seconds on a vertical specimen; drips of flaming particles are allowed.
  • V-1: burning stops within 30 seconds on a vertical specimen; drips of particles allowed as long as they are not inflamed.
  • V-0: burning stops within 10 seconds on a vertical specimen; drips of particles allowed as long as they are not inflamed.

Most conformal coatings aim to achieve V-0 status.

UL 746E Standard Polymeric Materials: Industrial Laminates, Filament Wound Tubing, Vulcanized Fiber and Materials Used in Printed-Wiring Boards

The UL 746 test measures the resistance of the conformal coating to electrical ignition sources.

The conformal coating material’s resistance to ignition and surface tracking characteristics is described in UL 746E.


Need to find out more?

Click UL standards and conformal coating for further information on whether you need UL qualified conformal coatings or contact us directly and we can help you.

If you are new to Nexus and our work on conformal coatings then a good place to go is our Start Here page or our free conformal coating eBook.

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Why Sign Up For Nexus?

Conformal Coated Circuit BoardNexus is operated by consultants who act independently of any major conformal coating material and robotic equipment suppliers. Our aim is to support customers in all of their coating needs whether that is through direct support, knowledge transfer, training packages or consultancy.

Nexus offers outstanding value for money for the services that we offer. See how we can help you. Click Why Sign Up For Nexus?

New Associate Conformal Coating Experts Section for Nexus

Nexus has created an “associate” expert section for industry leaders in conformal coating allowing them to express their views on key areas.
Each Month Nexus examine an important issue in conformal coating that is relevant to users, suppliers and distributors alike.  The Experts will examine various areas of conformal coating and express their views covering key areas of interest which will be reviewed within a jargon busting area.

Nexus is open to all associate consultants and experts from companies who can offer advice to users of the service on any areas of conformal coating, cleaning and long term reliability.

Click New Associate Conformal Coating Experts Section to find an expert to help you.

Join here and work with Nexus as a conformal coating associate expert.

Nexus3C Conformal Coating Resource Exhibiting at Electronica India in Bangalore in September and are offering FREE Conformal Coating Support Packages to Visitors

Nexus3C, the Global Conformal Coating Resource, will be exhibiting at the Electronica India Show on the 11-13th September and would like to invite you to our Stand Number 3507 to discuss how Nexus can help you.

Nexus brings together the accumulated knowledge of independent conformal coating and electronics material consultants focused on helping electronics manufacturing users with their processes. We operate across North America, Europe & Asia and provide expertise in liquid & parylene conformal coatings, equipment, benchmarking, process specification, troubleshooting and training.

Nexus offer a full range of services around conformal coating and reliability including

  • Fundamental Research into the best conformal coating materials and equipment
  • Workshops, Exhibitions and online training webinars across the globe
  • Monthly Newsletter covering all areas of the conformal coating industry
  • How To guides providing technical details on conformal coating processing
  • Contributions from Associate Experts
  • Supplier Databases for easy reference
  •  Support packages, consultancy, troubleshooting
  • Spotlights on industry developments

Registration is free to users through our easy to use Nexus Registration portal at www.conformalcoatingconsultancy.com/cms/register or you can join at the show at our booth.

IMPORTANT NOTICE!

FREE CONFORMAL COATING SUPPORT PACKAGES FOR NEPCON VISITORS

To celebrate our first visit to Electronica India, Nexus will be offeringFREE Conformal Coating Support Packages from Nexus to visitors at the Electronica show. Ensure you have full protection and apply for your Support Package from Nexus at our stand.

We look forward to meeting you at the show.

Nexus3C Conformal Coating Resource Exhibiting at Nepcon Shenzhen next week and are offering FREE Conformal Coating Support Packages to Visitors

Nexus3C, the Global Conformal Coating Resource, will be exhibiting at the Nepcon Shenzhen Show on the 28-30th August and would like to invite you to our stand 1B83 to discuss how Nexus can help you.

Nexus brings together the accumulated knowledge of independent conformal coating and electronics material consultants focused on helping electronics manufacturing users with their processes. We operate across North America, Europe & Asia and provide expertise in liquid & parylene conformal coatings, equipment, benchmarking, process specification, troubleshooting and training.

Nexus offer a full range of services around conformal coating and reliability including

Registration is free to users through our easy to use Nexus Registration portal at www.conformalcoatingconsultancy.com/cms/register or you can join at the show at our booth.

IMPORTANT NOTICE!

FREE CONFORMAL COATING SUPPORT PACKAGES FOR NEPCON VISITORS

To celebrate our first visit to Nepcon Shenzhen, Nexus will be offering FREE Conformal Coating Support Packages from Nexus to visitors at the Nepcon Shenzhen show. Ensure you have full protection and apply for your Support Package from Nexus at our stand.

We look forward to meeting you at the show.

Just how good are the new environmentally friendly conformal coatings? Nexus Can answer this….

In an effort to answer this question and many more Nexus will begin Phase 1 of a full ongoing Conformal Coating Research Program in August.

This Research will identify the best conformal coating materials, conformal coating application processes and ultimately value for money for customers in the world of electronics printed circuit board protection.

The First Phase of the Research will:

  • Compare and rank the protective capability of a number new and well established conformal coatings including both liquid and parylene based materials, against single aggressive environments as well as the sequential load to provide a reliability enhancement index.
  • Compare and rank the performance capability of the commercial application methods including selective spraying, batch spraying, dipping and brushing.
  • Provide a cost comparison of coated assemblies and determine cost-benefit comparisons between coating materials and application processes combinations.

This research will be open to join by users and suppliers alike who wish to access the full unabridged data.

For further information on how to join the Program visit Nexus

Use Nexus Conformal Coating Buying Service and Use our Expertise to Save Money

PROCUREMENT SERVICE

The Nexus consultants can provide a partial or full purchasing service for conformal coating equipment, materials or subcontract coating service and achieve the best prices and processes.

Our consultants have many years experience working in the conformal coating market both in the commercial and technical areas so can identify the best technical process, material, subcontract service or equipment at the optimum price for the customer.

Example:

Customer A requires a Conformal Coating Material to protect his PCB product in the field.

Nexus can offer the following:

  • Identify the right type of conformal coating material for the product
  • Ensure that the conformal coating material type selected is compatible with the customers current and / or future equipment processes
  • Negotiate with a large selection of conformal coating material suppliers to obtain the best commercial price for the materials based upon technical support, length of contract, volume, global needs etc

Contact Nexus for your buying needs