Best 480 to 240 Transformer Single Phase Options for Your Electrical Needs
If you need reliable single‑phase transformers that convert 480 V to 240 V, you want models that balance safety, efficiency, and ease of use. The following selections cover common applications from small controls to distribution and automation needs. Each product is suitable for specific buyers—industrial hobbyists, facilities engineers, or integration specialists—depending on voltage, VA rating, and mounting style. The summary table below helps compare core specs at a glance.
| Product | VA / kVA | Primary Voltage | Secondary Voltage | ||
|---|---|---|---|---|---|
| Acme Electric T153004 | 0.05 kVA | 240/480 V | 120/240 V | Chassis, low-noise design | Small controls and low-power applications |
| 1-Phase Buck/Boost Step-Up | 23.4/40/70 A options | 208 V | 240 V | Inline transformer, wall or rack mount | Electrical loads needing voltage adjustment |
| Functional Devices TR50VA015 | 50 VA | 480/277/240/208/120 V | 24 V AC | Foot and single-threaded hub mount | Control circuits and low-voltage needs |
| Functional Devices TR40VA013 | 40 VA | 480/277/240/208 V | 120 V AC | Foot or hub mounting | Low-voltage control and signaling |
| SolaHD HS1F500B | 0.5 kVA | 240/480 V | 120/240 V | UL listed NEMA 3R enclosure | Industrial automation with outdoor suitability |
Acme Electric T153004 Low Voltage Transformer
- Primary: 240/480 V; Secondary: 120/240 V
- Rated 0.05 kVA; compact for tight spaces
- Quiet operation with sound levels below NEMA standards
- Electrostatic shield for enhanced protection
- Chopper lead wire terminations for secure connections
Best for: Small control panels or localized power supply needs where space is limited and noise must be minimized. Choose this when you need a straightforward step-down from a 480/240 V primary to 120/240 V secondary without bulk.
Limitations: Lower VA rating makes it unsuitable for high-power loads or expansive automation circuits.
1-Phase Buck/Boost Step-Up Transformer
- 1P operation; converts 208 V to 240 V
- Handles up to 23.4 A loads; options for 40 or 70 A
- Includes safety note: returns on transformers, phase, or frequency converters are restricted
- Conveys safety with factory-sealed status for reliability
Best for: Scenarios where a precise 208 V supply must be boosted to 240 V for compatible equipment, such as certain industrial controls or motors operating at 240 V. Better for intermittent or mission-critical loads that require a stable step-up.
Limitations: Not designed for broad distribution; the product’s return policy and end-of-life handling may affect long-term planning.
Functional Devices TR50VA015 Transformer
- 50 VA rating; multi-volt primary options including 480/277/240/208/120
- Output 24 VAC; designed for circuit protection integration
- Mounting: feet and single-threaded hub; convenient for panel setups
- Product type listed as electronic component; USA origin noted in specs
Best for: Control circuits where a compact, low-voltage 24 VAC output is needed from multiple high-voltage inputs. It’s a flexible choice when panel space is a factor and a simple 24 V control rail is required.
Limitations: VA rating is relatively modest; better suited for low-power signaling rather than heavy load distribution.
Functional Devices TR40VA013 Transformer
- 40 VA rating; 480/277/240/208 V primary to 120 V secondary
- UL5085-2 or UL5085-3 standards alignment; includes circuit breaker
- Mounts via feet or 1/2″ NPT hub; compact enclosure footprint
- Input voltage options include 208/240/277/480 VAC
Best for: Applications requiring a robust, code-compliant control transformer with easy mounting in compact panel spaces. Choose this when 120 VAC output is needed for relays, sensors, or small actuators.
Limitations: Slightly higher complexity due to multiple primary options; plan wiring accordingly to avoid misconnection.
SolaHD HS1F500B Non-Ventilated Transformer
- Non-ventilated, encapsulated design; 0.5 kVA
- Input: 240/480 V; Output: 120/240 V; 60 Hz
- UL listed; NEMA type 3R enclosure suitable for indoor/outdoor use
- Chopper lead wire terminations; side conduit knockouts
Best for: Industrial automation and field installations where outdoor or rugged environments require a weatherproof enclosure and clear separation between primary and secondary wiring. It suits medium-duty control panels that demand reliable isolation.
Limitations: Higher VA rating means larger physical footprint; plan rack or wall space accordingly.
Buying Guide
What is your required VA and current draw?
Match the transformer’s VA rating to the peak load you expect on the 24 V, 120 V, or other secondary circuits. Overestimating VA provides headroom, while underestimating risks overheating and nuisance trips.
What is the primary voltage availability?
Check whether your site has 208 V, 240 V, or 480 V service. Some units support multiple primaries; others are fixed. A transformer with flexible primary options can simplify installation in evolving systems.
enclosure and mounting considerations
Consider enclosure type (UL/NEMA rating) and mounting style (foot, hub, or inline). Outdoor or damp environments benefit from NEMA 3R or higher enclosures and protective features such as chopper terminations and shields.
Reliability and safety features
Electrostatic shields, circuit breakers, and UL/R rating influence long-term safety and service life. If a system requires quick maintenance or frequent rewiring, a transformer with accessible terminations and robust mounting is advantageous.
Compatibility with control circuits
For relays, sensors, and PLC inputs, ensure the secondary voltage matches control equipment requirements. Some units provide 24 VAC outputs suitable for low-voltage control circuits, while others focus on 120 VAC or 240 VAC secondary rails.
Installation practicality
Look for transformers with straightforward wiring, clear labeling, and compatible lead lengths. Units with integrated protection or easier access for service can reduce commissioning time in complex control environments.
Longevity and environmental fit
Indoor versus outdoor service, temperature rise ratings, and insulation class affect lifespan. Higher temperature ratings and rugged enclosures support harsher environments or longer duty cycles.
FAQ
- What does VA rating indicate for a transformer? VA rating indicates the maximum apparent power the transformer can handle, which relates to the load it can support on the secondary side without overheating.
- Can I use a 480 V to 240 V transformer for 208 V service? Some transformers support multiple primary inputs; verify the unit’s acceptable input voltages before connecting to 208 V to avoid misoperation.
- Is outdoor use allowed for these transformers? Outdoor use depends on enclosure rating. Units with NEMA 3R or equivalent are designed for outdoor or damp environments.
- What safety features should I look for? Electrostatic shields, circuit breakers, UL listings, and proper insulation classes contribute to safer operation and easier compliance.
- What is the best option for a compact panel? For tight spaces, select a transformer with a small footprint, chassis mounting, and a low-profile enclosure that still provides required electrical isolation.
- How do I choose between 24 VAC and 120 VAC outputs? Choose based on the control devices in your system. Relays and sensors often use 24 VAC, while some actuators and drives require 120 VAC.