Description
The Siemens MT0150J is a 150 VA control transformer engineered for dependable power conversion in commercial and industrial HVAC control circuits. With a multi-tap primary and dual secondary output, this transformer provides the flexibility needed to power a wide range of control components across varying supply voltages.
Overview
Designed for demanding HVAC applications, the MT0150J steps down higher line voltages to the low-voltage levels required by thermostats, relays, contactors, and other control devices. Its robust construction and Siemens engineering ensure long-lasting, stable performance in both new installations and retrofit applications.
Electrical Specifications
- VA Rating: 150 VA
- Primary Voltage: 208 / 230 / 460V (multi-tap)
- Secondary Voltage: 24V / 115V (dual secondary)
- Brand: Siemens
- Model / SKU: MT0150J
Key Features
- Multi-tap primary accommodates 208V, 230V, and 460V supply voltages for installation flexibility
- Dual secondary outputs (24V and 115V) power a variety of control circuit components simultaneously
- 150 VA capacity supports multiple loads in commercial HVAC control panels
- Siemens quality construction for reliable, long-term operation
- Suitable for use in new construction and retrofit/replacement applications
Typical Applications
- Commercial HVAC control panels and air handling units
- Rooftop units (RTUs) requiring multi-voltage primary supply
- Building automation and control systems
- Industrial control circuits requiring 24V or 115V secondary power
- Replacement transformer for existing Siemens MT-series installations







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