UL 969 & CSA C22.2 Certified
PGDQ2/8 Marking and Labeling Systems

Type R and Type L labels refer to the two main ways that UL controls the printing and distribution of its certification marks. The difference between the two lies in the control method, traceability, and ordering flexibility for manufacturers.

UL Listed Mark (UL Type L)
This is the most common UL Mark and is applied to complete products such as computers, televisions, appliances, smoke detectors, and industrial products. Products bearing the UL Listed Mark are suitable for standalone use and have been evaluated against UL’s safety standards. UL Type L, or UL Listed Mark labels, often include the UL Listed symbol, product’s model number, electrical ratings, and specific warnings or instructions. The label construction, including the materials, inks, and adhesives must be able to last the product’s lifetime and may need to meet specific environmental conditions such as high heat or outdoor exposure as part of the UL file.

UL Recognized Component Mark (UL Type R)
This mark is applied to components, such as power supplies, circuit boards, switches, wires, certain plastics, or even specific label materials, that are part of a larger product or system which will ultimately be UL Listed. These components are not meant for standalone use and only achieve their UL certification as part of the end product. Labels for UL Recognized Components also bear a distinct symbol. Crucially, the label materials themselves, namely the facestock, adhesive, and ink system, often need to be UL Recognized Components under UL 969 – Marking and Labeling Systems. This ensures that the label itself won’t compromise the safety or performance of the larger product it’s applied to.