The Genie 110846.0001.S is the factory replacement 120V primary control transformer for Genie commercial door operators in the MT (medium-duty trolley), MJ (jackshaft), and MH (hoist) product family. It steps down the 120VAC line input to the 24VAC required by the operator control circuit board and low-voltage accessory wiring. This transformer is specific to 120V installations and is not interchangeable with the 220V variant (110846.0002.S); installing the wrong voltage transformer will damage the operator. The MT/MJ/MH family represents Genie's established medium-duty commercial operator line, and this transformer is a direct OEM-specification replacement. Proper transformer sizing and voltage matching are critical to reliable operator control circuit performance.
A: No. The 110846.0001.S has a 120V primary winding and the 110846.0002.S has a 220V primary winding. These transformers are not interchangeable. Installing the wrong variant will result in incorrect secondary output voltage and may cause damage to the control board or operator.
A: The transformer steps down the 120V AC line voltage to 24VAC for use by the low-voltage control circuit inside the MT, MJ, or MH operator.
A: This transformer is designed for the older MT (medium-duty trolley), MJ (jackshaft), and MH (hoist) family of Genie commercial door operators. Confirm your operator model and primary line voltage before ordering.
A: The secondary output is 24VAC, which powers the control circuit of the operator.
A: The suffix .S typically denotes a service or replacement part designation used by Genie for their aftermarket replacement component catalog. It does not indicate a change in the electrical specification of the transformer.
