Do You Need a Class 2 or a Class II LED Driver?

Do You Need a Class 2 or a Class II LED Driver?

You have learned that it is preferable to use the Class 2 LED driver in the LED signage and lighting applications in order to better manage and limit the possible risk of electric shock danger in installing and operating the devices. However, many people confuse the class 2 (Numeric 2) with the class II (Roman Numeral II) strength supply. They are both valid standards, controlled by different organizations, but they are meant to provide different protections in different methods. Here is a fleeting explanation of each designation to help you distinguishing between the two.

Class 2: Class 2 strength supplies are governed by UL (Underwriters Laboratories) 1310 standard. The main focus of UL-1310 is to ensure the output from each channel of the strength supply cannot go beyond 100 Watts (or five times output voltage if is it is lower than 20V) in any given circumstances, such as the rated working temperature, start-up or shut down course of action and the faulty conditions. UL-1310 is applied to supervise the Class 2 LED driver in addition. If you are a US domestic LED sign or lighting application builder, you need a Class 2 LED driver, not a Class II strength supply.

Class II: Class I and Class II are both stated in the EN-60950 (the European standard). The former requires a ground connection – usually done by using the 3-prong AC input, established, so the additional current generated in the fault condition can be quickly shunt to ground without damaging the character or the operator. The latter calls for a double insulation on the dominant and the secondary side of the strength supply if the ground connection is missing. Class II strength supplies are typically used in the telecommunication industry. You can find it resides in many consumer electronics products, such as the Digital Video Recorder, network switch and wireless router.


If your signage or lighting application is made up of LED related illumination technology, be sure to use a Class 2 LED driver to strength your system. A Class 2 LED driver can be make up of consistently several output channels but the maximum output strength of each channel wont go beyond 100 watts. By limiting the absolute maximum output strength to the UL predefined level – 100 watts, the Class 2 LED driver can reduce the chance of producing excessive out-going current, over-heating the cables and creating an electric shock danger. consequently, it can sustain a safer installation and operation experience for your applications.

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