The Marantec 158869 Transformer Box is an OEM replacement power component designed for select Marantec operator systems. This enclosed transformer assembly supplies the low-voltage power needed by the operator’s control electronics, helping maintain reliable performance of the opener or gate operator. As a genuine Marantec part, it is engineered to integrate with compatible Marantec control boards and harnesses, making it a direct swap when the original transformer box fails or shows signs of power irregularities.
Use this replacement transformer box to restore proper power delivery in applicable Marantec garage door opener or operator installations. For compatibility, match the part number 158869 with the parts list in your operator’s manual or consult Marantec support to confirm fitment by model. Because this is an electrical component, installation should be performed by a qualified technician with power disconnected at the source, following all manufacturer safety instructions and local codes. No performance specifications are provided here beyond its intended role as the OEM low-voltage supply for designated Marantec systems.