Industrial A21125-A Power Supply Board

Industrial A21125-A Power Supply Board is a legacy control-system module described as a power supply board that integrates three transformers and seven relays, a configuration used to distribute power and provide multiple relay contacts within an automation cabinet. Supplier listings specify the A21125-A precisely as a three-transformer, seven-relay power supply board, a hallmark of older industrial control hardware; the part is listed as discontinued by the manufacturer and is commonly offered as stock equipment or surplus. Catalog notes also place the A21125-A alongside related PCB assemblies such as 1-D21231 printed module card circuit boards (A21125A) and 1-D21232 assemblies, signaling its role as a PCB-based power/distribution and interface module within a larger control-system assembly. Because the design is older and discontinued, buyers should verify exact compatibility with their legacy controller and cabinet revision, since the A21125-A is an older design and may require matching pinouts or mounting arrangements. When sourcing this part, rely on reputable surplus suppliers or refurbishers who can confirm revision level and provide documentation for related D21231/D21232 family components.