EM250S12DC 250W Outdoor Magnetic 12VDC Transformer

EM250S12DC 250W Outdoor Magnetic 12VDC Transformer

The EM250S12DC is a 250W outdoor magnetic DC transformer / LED driver designed for compatible 12VDC low voltage lighting systems. It combines an encapsulated magnetic transformer with a black powder-coated NEMA 3R steel enclosure and manual circuit protection.

Why Choose the EM250S12DC?

✔ 250W 12VDC Capacity
Provides up to 250W of single-circuit DC power for compatible low voltage lighting loads.

✔ Outdoor NEMA 3R Housing
Powder-coated steel enclosure protects the transformer in outdoor installation environments.

✔ Primary & Secondary Protection
Manual reset breakers provide dedicated protection on both sides of the transformer.

✔ 90% Efficiency
Rated for 90% efficiency at the specified operating conditions.

Electrical Specifications

• Input Voltage: 120V 60Hz
• Max. Input Current: 2.5A at full load
• Output Voltage - No Load: 12.7VDC
• Output Voltage - Fully Loaded: 11.5VDC
• Max. Total Wattage: 250W
• Max. Output Current: 20.8A
• Efficiency: 90%

Construction & Certification

• Enclosure: Black powder-coated steel, outdoor NEMA 3R
• Transformer Construction: Encapsulated magnetic transformer with separated primary and secondary windings
• Certification: Conforms to UL 2108; certified to CSA C22.2 No. 250.0
• Primary Breaker: 4A manually reset
• Secondary Breaker: 25A manually reset
• Dimensions: 8 × 4.15 × 3.41 in

How to Select the 250W 12VDC outdoor magnetic transformer

Choose the EM250S12DC when a project requires a 250W 12VDC outdoor magnetic transformer and the available supply matches 120V 60Hz. Confirm that every connected fixture accepts 12VDC and that the planned load fits the transformer’s circuit configuration. Its black powder-coated NEMA 3R steel enclosure is intended for outdoor transformer installations.

This is a single-circuit model, so all connected fixture wattage counts toward the listed 250W maximum. The specifications show 12.7VDC at no load and 11.5VDC at full load, giving installers a reference for expected output as the connected load changes. Final transformer location, wiring, circuit protection and code compliance should be reviewed by a qualified installer before the system is energized.

Frequently Asked Questions

What lighting systems can use the EM250S12DC?
This 250W 12VDC outdoor magnetic transformer is intended for compatible low-voltage landscape or architectural lighting that accepts 12VDC power. The connected load must stay within the listed 250W capacity and 20.8A output-current limit.

Is the EM250S12DC dimmable?
Dimming is not listed as a feature in the supplied product data. Confirm dimmer compatibility in the EMCOD specification sheet before designing a dimming system.

Can this transformer be installed outdoors?
Yes. Its black powder-coated NEMA 3R steel enclosure is specified for outdoor transformer installations. Final placement and wiring must still follow the product instructions and applicable electrical requirements.

Compare voltage, capacity, circuit and enclosure options in our low-voltage landscape lighting transformer collection.

Official EMCOD Specification Sheet: Download PDF