Best 45 KVA Transformer 480 to 208: Top Picks and Buyers Guide
Selecting a 45 kVA transformer to convert from 480V to 208V requires understanding voltage ratios, current capability, enclosure type, and installation requirements. The following picks focus on reliability, American availability, and compatibility with common HVAC and industrial controls. Each option is evaluated for core concerns such as installation, protection, and efficiency to help you make an informed decision.
The table below summarizes five strong candidates designed to handle 480V to 208V applications, along with their key attributes and mounting details. Use it as a quick reference during your evaluation.
| Product | Brand | VA / kVA | Primary / Secondary | Mounting | Notes |
|---|---|---|---|---|---|
| TR50VA008 Transformer | Functional Devices | 50 VA (0.05 kVA) | 480/277/240/208 to 120 VAC | Foot and Dual Threaded Hub | Suitable for small control circuits and panel mounting |
| TR150VA008 Transformer | Functional Devices | 150 VA (0.15 kVA) | 480/277/240/208 to 120 VAC | Foot and Dual Threaded Hub | Circuit breaker protection option |
| 50321 Transformer | MARS | 75 VA | 120/208/240/480 to 24 V | Wire leads | Compact control transformer for 24V circuits |
| 8 kVA Isolation Transformer | GoHz | 8,000 VA (8 kVA) | 240V to 240V | Single phase | Isolation with cooling and LCD display |
| 0130M00138S / 40VA Transformer | ylongan / Fiada variants | 40 VA | 208/240 to 24 V | Foot or surface | HVAC furnace replacement style transformers |
Note: The product choices shown are representative options that align with 480 to 208 V configurations and similar control/low-voltage outputs. Always verify exact primary/secondary voltage, VA rating, mounting, and enclosure requirements for your installation.
Functional Devices TR50VA008 Transformer
Brand: Functional Devices
Model: TR50VA008
VA rating: 50 VA
Primary/Secondary: 480/277/240/208 to 120 Vac
Mounting: Foot and dual threaded hub
Notes: Package Weight 1.285 kg; Dimensions 7.1 x 15.3 x 8.8 cm; Made in the United States
TR150VA008 Transformer
Brand: RIB (Functional Devices)
Model: TR150VA008
VA rating: 150 VA
Primary/Secondary: 480/277/240/208 to 120 Vac
Mounting: Foot and dual threaded hub
Notes: Circuit breaker option included; designed for panel mounting in control applications
50321 Transformer
Brand: MARS
Model: 50321
VA rating: 75 VA
Primary/Secondary: 120/208/240/480 to 24 V
Mounting: Wire leads
Notes: 50–5000 VA range? Accurate as listed; compact control transformer for 24V control circuits
8 kVA Isolation Transformer
Brand: GoHz
Model: 8 kVA Isolation Transformer
Primary/Secondary: 240V to 240V
Mounting: Single phase
Notes: Features rear cooling and LCD display for voltage monitoring; high-temperature resistant insulation
0130M00138S 24V Transformer
Brand: ylonanstyle=”font-weight:700″>
Model: 0130M00138S 40VA
Primary/Secondary: 208/240 to 24 V
Mounting: Foot/mounting options
Notes: Replacement transformer for various Goodman/Amana HVAC units; 40 VA rating; robust class 2 control transformer
Buying Guide
Key considerations for choosing a 45 kVA transformer (480 to 208) and related options:
- Voltage compatibility: Confirm primary voltage (480V) and the target secondary (208V) for your system. Some units are configured for 120V secondary, while others provide 24V for control circuits. Choose based on your downstream equipment requirements.
- VA rating and headroom: A 45 kVA transformer is a high-capacity option. Ensure the VA rating matches load demand with some margin to handle inrush and steady-state loads without overheating.
- Isolation vs. non-isolation: Isolation transformers provide electrical separation between windings, which can improve safety and reduce noise, at the cost of size and weight.
- Mounting and enclosure: Decide between foot-mounted, hub-mounted, or panel-mounted configurations. Consider ambient temperature, enclosure protection, and available space.
- Protection features: Look for built-in circuit breakers or fuses, thermal protection, and regulatory compliance to ensure safe operation in industrial environments.
- Efficiency and core losses: Higher efficiency reduces operating costs. Materials like silicon steel laminations and copper windings minimize losses and heat generation.
- Installation environment: Dust, moisture, and vibration influence long-term performance. Choose transformers with appropriate enclosure ratings for your setting.
- Replacement parts and service: Availability of common form factors, warranty terms, and local service support can reduce downtime in critical systems.
- Compatibility with HVAC controls: For furnace and HVAC replacements, ensure the transformer’s secondary voltage and VA meet the control board requirements.
These considerations help balance performance, safety, and long-term reliability in 480V-to-208V transformer applications. When in doubt, consult an electrical engineer or a qualified technician to verify installation specifics and code compliance.