Finding a reliable 2 kVA transformer that converts 480V (or similar high-voltage inputs) down to 120V can be essential for sensitive equipment, control systems, and lighting setups. The following selections focus on transformers that handle 480V (and related voltages like 277V/240V/208V) and provide a 120V output. Each entry includes key specs, mounting options, and typical use cases to help you compare quickly.
| Product | Input/Output Notes | Rating | Mounting | Brand |
|---|---|---|---|---|
| TR50VA008 Transformer | 480/277/240/208 to 120 Vac | 50 VA | Foot & Dual Threaded Hub | Functional Devices |
| TR150VA008 Transformer | 480/277/240/208 to 120 Vac | 150 VA | Foot & Dual Threaded Hub | Functional Devices |
| TR40VA013 Transformer | 480/277/240/208 to 120 Vac | 40 VA | Foot & Single Threaded Hub | Functional Devices |
| ELCO ETR-277 Transformer | 277V to 120V Output | 250 VA | Magnetic | ELCO Lighting |
| Three-Phase Dry-Type Transformer | 380V/480V to 220V/120V, 2 kVA | 2 kVA | Industrial enclosure (typical) | RCTCBRZVTW |
Functional Devices TR50VA008 Transformer
The TR50VA008 is a compact control transformer designed for commercial and industrial panels requiring 120V outputs from higher voltage inputs. It supports a 480/277/240/208 V input range and delivers robust power for control circuits, lighting, and small equipment. Mounted on a foot or dual threaded hub, the unit is suitable where space is limited yet reliability matters. It includes a circuit breaker as part of the package, aligning with standard protection practices for control circuits. Typical applications include valve controllers and relay bases in control panels.
Functional Devices TR150VA008 Transformer
The TR150VA008 provides a higher VA rating (150 VA) while supporting the same input range as the smaller TR50VA008. This makes it suitable for larger control circuits, relay banks, or multiple low-power devices fed from a common 480/277/240/208 V source. Like the other TR-series units, it offers foot and dual-threaded hub mounting and includes protection via a circuit breaker. It is well-suited for industrial panels, commercial lighting controls, and HVAC control loops that demand greater current capacity than lower-VA transformers.
Functional Devices TR40VA013 Transformer
The TR40VA013 offers 40 VA capacity, designed for smaller control circuits that require 120V output from 480/277/240/208 inputs. It features a circuit breaker for protection, a compact footprint, and mounting options including foot and hub variants. With detailed specs covering enclosure footprint and dual or single-threaded mounting, this transformer is ideal for panel builders aiming to minimize space while ensuring reliable power for relays, timers, and controllers.
ELCO Lighting ETR-277 Magnetic Transformer
The ELCO ETR-277 Magnetic Transformer is designed for 277V input, delivering 120V output with a magnetic transformer topology. It offers multiple wattage options, including 250W, making it suitable for low-voltage lighting fixtures, display cases, or architectural lighting where 277V is the supply. Magnetic transformers typically generate less heat and respond quickly to voltage changes, though they are heavier than solid-state equivalents. This unit supports flexible installations in commercial lighting projects that rely on 277V feedlines.
Three-Phase Dry-Type Transformer (2 kVA)
This three-phase dry-type transformer is sized for 2 kVA and is designed to step down from a 380V/480V three-phase input to a lower voltage suitable for 120V systems, where applicable. Dry-type construction offers robust durability in industrial environments, straightforward maintenance, and relatively quick installation. Note that applications may require three-phase distribution panels and compatible wiring, with appropriate enclosure and protection strategies for safe operation in industrial settings.
Buying Guide: Key Considerations For 480V To 120V Transformations
- Voltage compatibility: Confirm input voltage options (480V, 277V, 240V, 208V) and whether the transformer can provide a stable 120V output for your load. Some units are specifically 277V-to-120V or 240/480-to-120V variants; choose based on your supply.
- VA rating vs. load: Match the transformer’s VA rating to the cumulative load of devices fed from the 120V side. Overloading a transformer leads to voltage sag, overheating, and potential failure.
- Topology: Magnetic transformers (often heavier but simple) vs. solid-state/encapsulated types (more compact, efficient, and with better regulation). Your environment and maintenance plans influence the choice.
- Mounting and enclosure: Foot mounting, hub options, and enclosure ratings affect installation in control panels or industrial spaces. Ensure compatibility with panel space and IP/rating needs.
- Protection and wiring: Look for built-in circuit breakers or fusing options, and verify secondary wiring (leads, terminal blocks, or lug connections) aligns with your circuit designs.
- Response to inrush and startup: Some transformers handle inrush well, others do not. For large loads or lighting drivers, inrush characteristics can impact performance and wiring sizing.
- Maintenance and durability: Dry-type transformers are durable for industrial use and easier to maintain in harsh environments, while magnetic transformers may require more careful heat management.
- Certifications and origin: UL/CSA listings and country of origin can impact acceptance in building codes and compliance for commercial applications.
- Space and efficiency: Consider the footprint, weight, and heat dissipation. In compact control panels, a high-efficiency unit with a smaller footprint can simplify installation.
In choosing a 2 kVA transformer for 480V (or related high-voltage) to 120V applications, ensure the selected model aligns with your input supply, required 120V load, mounting constraints, and protection needs. The options listed cover a range of VA capacities, mounting styles, and input voltage allowances to support diverse industrial and commercial installations.