Square D 3-Phase 480V to 208Y/120V Transformer
A Square D 3-Phase 480V to 208Y/120V Transformer is a dry-type electrical transformer designed to reduce 480-volt three-phase power to 208Y/120-volt power for commercial, industrial, and other electrical distribution applications. Square D transformers are widely used where reliable voltage transformation is required for lighting, equipment, machinery, control systems, and building electrical distribution.
Electrical Supplies Unlimited has over 40 years of experience buying and selling electrical equipment. We offer new, used, surplus, obsolete, discontinued, and hard-to-find Square D transformers and can help customers locate the right transformer based on voltage, kVA, phase, enclosure, and application.
Square D 3-Phase 480V to 208Y/120V Transformers for Sale

Electrical Supplies Unlimited buys and sells Square D 480V to 208Y/120V three-phase transformers in a variety of kVA ratings and configurations. Depending on availability, we may have new, surplus, or previously installed transformers available for immediate purchase.
Square D manufactures three-phase dry-type transformers in a range of capacities. For example, Square D models are available with a 480V delta primary and 208Y/120V secondary, including 30 kVA, 45 kVA, 112.5 kVA, 150 kVA, 225 kVA and other ratings. Actual specifications vary by model, so the transformer nameplate and catalog number should always be verified before installation.
If you need a specific Square D transformer, provide us with the model number, kVA rating, primary voltage, secondary voltage, phase, and available nameplate information. We can help locate new or surplus equipment or identify an appropriate replacement.
Common Square D 480V to 208Y/120V Transformer Configurations
Square D three-phase transformers with a 480V primary and 208Y/120V secondary are available in multiple sizes. Common configurations include:
- Square D 15 kVA 480V to 208Y/120V transformer
- Square D 30 kVA 480V to 208Y/120V transformer
- Square D 45 kVA 480V to 208Y/120V transformer
- Square D 75 kVA 480V to 208Y/120V transformer
- Square D 112.5 kVA 480V to 208Y/120V transformer
- Square D 150 kVA 480V to 208Y/120V transformer
- Square D 225 kVA 480V to 208Y/120V transformer
- Square D dry-type and energy-efficient three-phase transformers
The exact transformer required depends on the connected load, available primary power, required secondary voltage, installation environment, and electrical system design.
Square D 480V to 208Y/120V Transformer Specifications
Transformer specifications vary by model and kVA rating. Important specifications to verify when purchasing a Square D three-phase transformer include:
- Manufacturer: Square D / Schneider Electric
- Phase: Three phase
- Primary voltage: 480V delta on applicable models
- Secondary voltage: 208Y/120V
- Frequency: Typically 60 Hz
- Capacity: Available in multiple kVA ratings
- Transformer type: Dry-type
- Cooling: Natural convection on applicable dry-type models
- Enclosure: Varies by model and application
- Temperature rise: Varies by model
- Taps: Varies by model
- Coil material: Aluminum or copper depending on model
For example, Square D model EXN30T3H is a 30 kVA three-phase dry-type transformer with a 480V delta primary and 208Y/120V secondary. It includes multiple full-capacity taps and is designed for low-voltage electrical distribution applications.
Used Square D 3-Phase 480V to 208Y/120V Transformers
Buying a used Square D transformer can be an economical alternative to purchasing a new transformer, particularly when a replacement is needed quickly or when a discontinued transformer must be matched to an existing electrical system.
Electrical Supplies Unlimited buys and sells used and surplus Square D transformers. Used equipment may be available in different kVA ratings, enclosure types, voltage configurations, and manufacturing years.
Before purchasing a used transformer, verify the nameplate information and make sure the primary and secondary voltages, phase, kVA rating, frequency, and other specifications are appropriate for the intended application. A qualified electrician or electrical engineer should determine suitability for installation.
Square D 480V to 208Y/120V Transformer Replacement
When an existing transformer fails or becomes obsolete, finding an exact replacement can sometimes be difficult. Electrical Supplies Unlimited can help locate Square D transformer replacements based on the original manufacturer's part number, kVA rating, voltage configuration, and physical requirements.
If an exact Square D replacement is no longer available, an equivalent transformer may be possible. However, transformer replacement should not be based solely on voltage. The kVA rating, phase, primary and secondary configuration, impedance, taps, enclosure, temperature rise, dimensions, connections, and other specifications may need to be considered.
Obsolete and Hard-to-Find Square D Transformers
Electrical Supplies Unlimited specializes in locating obsolete, discontinued, surplus, and hard-to-find electrical equipment. This is particularly useful when an older Square D transformer needs to be replaced but the original model is no longer manufactured.
We can search our inventory and supplier network for Square D transformers that match the original equipment specifications. If you have an old transformer, send us the model number and nameplate information whenever possible.
We Buy Square D Transformers
Do you have a surplus or unused Square D transformer? Electrical Supplies Unlimited buys Square D transformers from businesses, electrical contractors, industrial facilities, electrical distributors, and other organizations.
We purchase new, used, surplus, discontinued, and obsolete electrical equipment. If your facility has excess transformers that are no longer needed, contact ESU to discuss selling the equipment.
We also buy other electrical equipment including transformers, circuit breakers, electrical panels, disconnects, safety switches, motor controls, fuses, relays, and related electrical distribution equipment.
Why Buy Square D Transformers from ESU?
- Over 40 years of electrical equipment experience
- New, used, surplus, obsolete, and discontinued equipment
- Specialization in hard-to-find electrical equipment
- Square D and Schneider Electric transformer sourcing
- Multiple transformer voltage and kVA configurations
- Equipment available for commercial and industrial applications
- Nationwide sales and equipment sourcing
- Help identifying replacement equipment from transformer nameplates
Find a Square D 3-Phase 480V to 208Y/120V Transformer
If you are looking for a Square D 3-Phase 480V to 208Y/120V Transformer, Electrical Supplies Unlimited can help you locate the equipment you need. Whether you need a new transformer, used transformer, surplus unit, obsolete replacement, or hard-to-find Square D model, contact us with the transformer specifications.
Call Electrical Supplies Unlimited at 858-558-2850 to check availability or discuss your transformer requirements.
More Electrical Transformer Resources
Electrical Supplies Unlimited supplies a wide range of electrical distribution equipment for contractors, electricians, commercial facilities, industrial customers, and businesses. Contact us if you are searching for a specific transformer model, voltage, kVA rating, or obsolete electrical component.