Class 2 Circuits are defined by the National Electric Code. According to NEC Article 725.2, a Class 2 circuit is defined as
“The portion of the wiring system between the load side of a Class 2 Power Source and the connected equipment. Due to its power limitations, a Class2 circuit considers safety from a fire initiation standpoint and provides acceptable protection from electrical shock.”
Powering a device using a Class 2 power source can offer significant advantages. Key among these are simplified wiring methods, reduced spacings on printed circuit boards, the possible elimination of over current protection from the load side of the circuit, and enhanced safety. In the United States, Class 2 power sources are evaluated under UL Standard 5085-3 (formerly UL 1585). The Canadian Standard is C22.2 No. 66.1. Internationally, there is no direct equivalent to a Class 2 circuit, but the definition of a LPS (Limited Power Source) circuit in EN 60950-1 and UL 60950-1 is functionally equivalent. Class 2 transformers certified for international use would be evaluated to EN 61558-1 and EN 61558-2-6 as Safety Isolating Transformers.
Foster offers a broad range of UL Recognized and Listed Class 2 transformers. In addition, we have an expanding range of transformers certified to EN 61558-1 and EN 61558-2-6. Depending on your need and application, you will likely find a solution in one of our standard lines. Standard products can be customized for your particular application including custom wire colors and lengths, the application of many AMP and Molex terminals, special mounting brackets and markings. We can also design a custom transformer for you, if nothing else fits.