Best 50 VA to 0.5 kVA Transformers for 480 to 240 Volt Applications
Looking for a reliable transformer to convert 480V primary to 240V secondary? This guide highlights five practical options that cover a range from 50 VA up to about 0.15 kVA, with clear considerations for each use. These units are suitable for control circuits, HVAC controls, and low-voltage equipment in industrial and commercial settings. The selections emphasize accessibility, core efficiency, and mounting versatility to help buyers identify which model fits their installation needs.
Industrial Control Transformer .100 kVA 240 X 480 Primary Volts – 120 X 240 Secondary Volts
Brand: Hubbell Acme Electric (HUBDX)
Primary/Secondary: 240 x 480 V to 120 x 240 V
Features: 50 – 5000 VA, 50/60 Hz; epoxy encapsulated design protects core & coil from contaminants; silicon steel lamination minimizes core losses and increases efficiency.
- Best for mid-range control panels that require robust, compact isolation while handling common control voltages.
- Caution: Data emphasizes efficiency and contamination protection; verify mounting and enclosure compatibility for outdoor or harsh environments.
Industrial Control Transformer .050 kVA, 240 X 480 Primary Volts – 120 Secondary Volts
Brand: Hubbell Acme Electric (HUBDX)
Primary/Secondary: 240 x 480 V to 120 V
Features: 50 – 5000 VA, 50/60 Hz; epoxy encapsulated for contaminant protection; silicon steel lamination to reduce core losses and boost efficiency.
- Best for smaller control circuits needing stable 120V outputs from 480V/240V sources.
- Caution: Lower VA rating means limited load; ensure your circuit power stays within 50 VA to avoid overload.
Industrial Power Transformer, Domestic, 240 X 480 Primary Volts 50/60Hz
Brand: SIEMENS
Primary/Secondary: 240 x 480 V to 120 x 240 V
Features: Rated up to 100 VA; silicon steel-laminated core and copper magnet wire for improved transformer efficiency.
- Best for traditional 120V secondary loads in smaller industrial or commercial equipment setups.
- Caution: Ensure compatibility with 50/60 Hz service and enclosure ratings for your installation.
Industrial Control Transformer .150 kVA, 240 X 480 Primary Volts
Brand: Hubbell Acme Electric (HUBDX)
Primary/Secondary: 240 x 480 V to 120 V
Features: 50 – 5000 VA, 50/60 Hz; epoxy encapsulated design; silicon steel lamination to minimize core losses and improve efficiency.
- Best for mid-to-high load control applications needing a compact 120V secondary from a 480V source.
- Caution: The higher VA rating requires careful wiring and enclosure space planning to prevent overheating.
TR50VA008 Transformer 480/277/240/208V to 120V 50VA Transformer with Circuit Breaker Foot
Brand: GUSUUI
Primary/Secondary: 480/277/240/208 V to 120 V
Features: 50 VA output; integrated circuit breaker; dual threaded hub mount and foot mount.
- Best for HVAC or industrial control tasks requiring flexible input voltages and built-in protection.
- Caution: 50 VA limits sustained loads; verify actual load current to avoid circuit breaker nuisance tripping.
Buying Guide
Key considerations when selecting a 480V-to-240V transformer:
- Voltage compatibility: Confirm primary input voltages (480, 277, 240, 208) and the required secondary (120V) for your application.
- Power rating: Choose VA/kVA to match or exceed your load. Higher VA offers more headroom for future upgrades.
- Mounting and enclosure: Assess whether foot mount, hub mount, or integrally mounted primary blocks fit your panel or cabinet.
- Efficiency and core design: Epoxy encapsulation and silicon steel laminations reduce losses and improve reliability in harsh or dirty environments.
- Protection features: Built-in breakers or fuses provide overload protection but must be sized for expected loads.
- Environmental suitability: Consider ambient temperature, humidity, and potential exposure to contaminants when selecting an enclosure type.
Frequently Asked Questions
- What does 480/240V to 120V mean in these transformers?
These transformers step down a high-voltage primary (480V or related variants) to a standard 120V secondary for control circuits and low-voltage equipment. - Is 50 VA enough for most HVAC control panels?
For small control devices, 50 VA can be sufficient, but larger panels may require 100 VA or more depending on loads. - Do these transformers include protective features?
Some models include built-in circuit breakers; others rely on external protection. Check each product’s features. - Should I choose epoxy-encapsulated transformers?
Epoxy encapsulation protects core and windings from contaminants, useful in dirty or damp environments. - What is the difference between foot mount and hub mount?
Foot mount is a base with legs; hub mount uses threaded holes for secure mounting, often suited for panel interiors. - Can I use these transformers outdoors?
Outdoor use depends on enclosure rating and environmental protection; select models rated for outdoor conditions.
Quick Reference: Buying Table
| Product | ||||
|---|---|---|---|---|
| Industrial Control Transformer .100 kVA 240 X 480 | 100 VA | 240×480 to 120×240 | Factory installed 2-Pole Primary Block | Mid-range control panels needing reasonable headroom |
| Industrial Control Transformer .050 kVA | 50 VA | 240×480 to 120 | 2-Pole Primary Block | Compact, low-load control circuits |
| Siemens Industrial Power Transformer | 100 VA | 240×480 to 120×240 | Flat mounting (panel-ready) | USB/low-power controls in small cabinets |
| Industrial Control Transformer .150 kVA | 150 VA | 240×480 to 120 | Factory installed 2-Pole Primary Block | Higher-load control panels where headroom is needed |
| TR50VA008 Transformer 480/277/240/208V to 120V | 50 VA | 480/277/240/208 to 120 | Foot and Dual Hub Mount | HVAC controls with multiple input voltages |