1. Home
  2. Press Center
  3. knowledge
  4. UL 810 Certification Specifications


UL 810 Certification Specifications


The UL 810 standard specifies general-purpose capacitors, which are mainly used as auxiliary devices for starting or operating various American AC motors, such as household or electrical motor equipment. The most common applications are for starting or operating air conditioner/refrigerator/fan motors; Some will be used in fluorescent or halogen lamps and electrical equipment power factor correction loads.

According to this standard, capacitors can be distinguished according to their performance and structure, and are mainly divided into three categories:

  • Structural audit type (UL product category code CZDS2) ─ does not test the protection capability when internal abnormal short circuit occurs, and shall not declare the maximum effective fault current protection capability, but the maximum declared operating voltage is 7.2KV.

  • Internally protected type (UL Product Category Code CYWT2) - AFC maximum effective fault current (short circuit) protection capability needs to be declared, the maximum AFC is marked as 10000A.

  • Electrolytic Capacitors (UL Product Category Code CZEH2) – 600V maximum, subject to overvoltage and pressure relief testing.

After establishing the above-mentioned normative context, relevant manufacturers can then enter several key requirements of our specially extracted standards so that the product can conduct self-testing within the company before officially entering the certification stage, thereby improving the success and success of the product in testing. Probability of evidence collection.

Enclosure requirements – different for metals and non-metal
Metal housing: steel at least 0.25 mm thick; aluminum or copper at least 0.41 mm thick. All-metal sealed enclosures can only apply for the UL product category code CYWT2 product series.
Non-metal casing: The plastic used in the capacitor's casing needs to be UL certified and meet the requirements of a flame class (Flame Class) greater than V-2 and a dielectric strength (Dielectric Strength) greater than 5KV.

Insulating Material Requirements
For internal insulation materials, UL 810 generally requires that the fire rating is greater than HB. However, once there is a risk of exposure of the insulation material, such as the structure shown below, testing must be performed in accordance with UL's requirements for plastic enclosures.

In addition, according to the requirements of UL 810 4.3.4, the temperature resistance of the shell and epoxy resin (Epoxy) needs to be higher than 70°C or the declared temperature of the capacitor, whichever is greater.