Best 480 to 240 Single-Phase Transformers for 120/240 v Applications
Choosing the right 480 to 240 single-phase transformer involves assessing primary and secondary voltages, VA rating, mounting style, and efficiency. This guide highlights five suitable options from trusted brands, with quick references to their capabilities and typical use cases. Whether you’re updating an industrial panel, upgrading equipment, or integrating legacy hardware, the right transformer can improve performance and reliability.
| Product | Primary | Secondary | VA Rating | Mounting |
|---|---|---|---|---|
| Hubbell Acme Electric .050 kVA | 240 x 480 | 120 x 240 | 50 VA | Factory mounted 2-pole |
| Functional Devices TR50VA008 | 480/277/240/208 | 120 Vac | 50 VA | Foot and dual threaded hub |
| Functional Devices TR150VA008 | 480/277/240/208 | 120 Vac | 150 VA | Foot and dual threaded hub |
| Acme Electric T153004 | 240 x 480 | 120/240 | 50 VA | Standard enclosure |
| Siemens MT0200A | 240 x 480 (and variants) | 120/115/110 | 200 VA | Compact industrial |
Hubbell Acme Electric .050 kVA Transformer
The Hubbell Acme Electric transformer offers a compact 0.05 kVA rating with a 240 x 480 V primary and 120 x 240 V secondary. It uses an epoxy encapsulated construction to protect the core and coil from contaminants, making it suitable for dusty or harsh environments. The unit employs high-quality silicon steel laminations to reduce core losses and improve efficiency. Ideal for panel upgrades or control circuits requiring reliable, small-scale voltage conversion.
Functional Devices TR50VA008 Transformer
The TR50VA008 from Functional Devices is a 50 VA transformer designed for 480/277/240/208 to 120 Vac conversion. It comes with both foot and dual threaded hub mounting, supporting flexible installation in control cabinets or on equipment frames. Package weights and dimensions are compact, making it a practical choice for projects requiring incremental voltage stepping without large footprint or weight. Useful for small control circuits and accessory power supplies.
Functional Devices TR150VA008 Transformer
The TR150VA008 is a 150 VA transformer that handles 480/277/240/208 to 120 Vac. It features robust mounting options with a foot and dual threaded hub for secure installation in industrial panels. This higher VA rating makes it suitable for powering medium-load control devices or multiple low-voltage circuits from a single primary source, while maintaining stable output across varying loads.
Acme Electric T153004 Transformer
The Acme Electric T153004 is a low-voltage distribution transformer rated at 0.05 kVA with a primary of 240 x 480 and a 120/240 V secondary. It features quiet operation and an electrostatic shield for enhanced protection, along with chopper lead wire terminations for reliable connections. Its compact size and shielded design suit small to mid-sized control panels and equipment that require clean, stable low-voltage power.
Siemens MT0200A Industrial Power Transformer
The Siemens MT0200A is an industrial power transformer with a 240 x 480 primary and a 120/115/110 secondary, rated up to 200 VA. It uses a silicon steel-laminated core and copper magnet wire to boost efficiency and reduce losses, supporting reliable power conversion in industrial or commercial settings. The design emphasizes durability and consistent performance under varying loads and environmental conditions.
Siemens MT0075A Industrial Transformer
The MT0075A is a 75 VA transformer from Siemens with a 240 x 480 primary and a 120/110/115 V secondary. It features a silicon steel-laminated core and copper magnet wire for efficiency. This unit is suitable for light to medium-duty control circuits, spares cabinets, or equipment that requires dependable power conversion in a compact footprint.
Siemens Industrial Power Transformer 500 VA
This Siemens 500 VA transformer offers robust performance with a 240 x 480 primary, stepping down to 120 x 240 secondary. Built for reliability, it uses a silicon steel-laminated core and copper magnet wire to boost efficiency and reduce heat. It suits industrial panel upgrades and applications demanding higher power with compact form factors.
Buying Guide: Key Purchase Considerations
- Voltage compatibility: Ensure the 480V primary and 120/240V secondary match your equipment and regional voltage standards.
- VA rating: Select a transformer with sufficient VA (apparent power) to power the intended load without overheating or voltage drop.
- Mounting and enclosure: Choose mounting options (foot, hub, or factory-mounted) that fit your panel or equipment space and environmental conditions.
- Efficiency and protection: Look for silicon steel laminations and copper windings for efficiency; an electrostatic shield or encapsulation helps withstand contaminants in harsh environments.
- Reliability and size: Consider the operating environment, noise levels, and duty cycle. Smaller units are suitable for compact panels, while higher VA units support multiple loads.
- Maintenance and serviceability: Access to windings, terminals, and compatibility with existing wiring simplifies maintenance and future upgrades.
- Standards and certifications: Verify compliance with applicable electrical standards for safety and performance in your region.
Comparisons and Perspectives
- Lower VA options (50–75 VA) are ideal for small control circuits and signaling devices, with compact footprints and easy installation.
- Mid-range (150–200 VA) transformers balance power and size, suitable for multiple low-power loads or more demanding control systems.
- Higher VA units (500 VA and above) support more extensive panels and equipment clusters but may require larger enclosures and dedicated cooling.
- Quality considerations include core material, winding type, contamination resistance, and mounting versatility.