What does ULH mean in ELECTRONICS

ULH stands for "Underwriters Laboratory-approved, Inductive resistor, Horizontal." This is a designation for electrical components that have been tested and certified by the Underwriters Laboratory as being safe for use in circuits.

Look for the UL Logo on the product or packaging. This indicates it has been tested and certified by Underwriters Laboratories. Additionally, a ULH should have an inductive resistor and be suitable for horizontal mounting.

Any type of electrical or electronic components that are installed in commercial or residential buildings typically require certification from Underwriters Laboratories. This includes wire connectors, power adapters, cable extensions, fuses and other similar items.

In addition to ULH there are other safety certifications such as CSA (Canadian Standards Association), ETL (Intertek Testing Services), CE (European Conformity) and others depending on where you live and what type of product you are looking to buy. These certifications indicate that the product meets certain safety criteria set forth by their respective organization.

Not all products will have the same level of testing done on them in order to receive UL approval. Certain products may receive partial approval or go through additional levels of testing before receiving complete approval from Underwriter Laboratories. It's always important to check with the manufacturer or seller if a specific product has been fully certified before making any purchases.