Overview
The MagneTek Triad N-5M 250VA autotransformer is a single-phase, non-isolated step-down transformer designed for industrial and commercial applications requiring 230V to 115V AC conversion. Unlike isolation transformers, autotransformers share a common primary and secondary winding, making them more compact and efficient for voltage conversion tasks. This unit operates at both 50Hz and 60Hz frequencies, delivering consistent performance in North American and international electrical systems.
Key Features
- 250VA Power Rating: Suitable for moderate-load 115V equipment operating from 230V primary supply
- Non-Isolated Step-Down Design: Efficient autotransformer topology for direct voltage conversion
- Dual-Frequency Operation: Rated for both 50Hz and 60Hz, enabling use in multiple electrical standards
- Bracket Mount Style: Robust mechanical mounting for secure installation in industrial enclosures or control panels
- No Plug/Outlet Configuration: Hardwired connection terminals for permanent installation
Technical Specifications
- Power Rating: 250 VA
- Primary Voltage: 230V AC
- Secondary Voltage: 115V AC
- Voltage Ratio: Step-down (2:1)
- Frequency: 50/60 Hz
- Transformer Type: Autotransformer (non-isolated)
- Mounting Style: Bracket mount
- Connection Type: Hardwired terminals
- Manufacturer: MagneTek/Triad
Typical Applications
- Voltage conversion for industrial equipment designed for 115V operation
- Control circuit power supply in manufacturing and process equipment
- Machine tool and CNC equipment voltage adaptation
- HVAC system control transformer applications
- Commercial facility equipment power conditioning
- Test and measurement equipment voltage scaling
Compatibility & Replacements
Compatible With
- Industrial motor control systems and variable frequency drives
- Manufacturing equipment and machine tools
- HVAC control circuits
- Automation and control panel installations
- Equipment designed for 115V AC single-phase power
Replaces / Drop-In Replacement For
- Other Triad 250VA step-down autotransformers with identical voltage and frequency ratings
- OEM replacement for equipment originally specified with MagneTek Triad N-5M
Works With
- Any 230V AC, 50/60Hz single-phase power source
- Standard hardwired power distribution systems
- Industrial electrical panels and control enclosures
- Equipment with hardwired, non-plug power connections





