EMS300S12AC 300W Outdoor Stainless Steel 12VAC Transformer

EMS300S12AC 300W Outdoor Stainless Steel 12VAC Transformer

The EMS300S12AC is a 300W outdoor magnetic transformer designed to provide 12VAC power for compatible low-voltage lighting systems. It uses a stainless steel outdoor enclosure for durable power distribution in landscape and architectural lighting applications.

Why Choose the EMS300S12AC?

✔ 300W Capacity
Provides up to 300W of power for compatible low-voltage lighting loads.

✔ 12VAC Output
Designed around a 12VAC output configuration.

✔ Outdoor NEMA 3R Enclosure
Stainless steel, NEMA 3R construction is intended for outdoor transformer installations.

Electrical Specifications

• Model: EMS300S12AC
• Input Voltage: 120V 60Hz
• Output Configuration: 12VAC
• Output Voltage - No Load: 12.8VAC
• Output Voltage - Fully Loaded: 11.8VAC
• Maximum Wattage: 300W
• Maximum Output Current: 25A
• Efficiency: 93%
• Circuit Configuration: Single circuit

Construction & Certification

• Enclosure: Stainless steel, NEMA 3R
• Certification: UL 2108 / CSA C22.2 No. 250.0
• Dimensions: 8 x 4.1 x 3.24 in

How to Select the 300W 12VAC stainless steel transformer

Choose the EMS300S12AC when a project requires a 300W 12VAC stainless steel transformer and the available supply matches 120V 60Hz. Confirm that every connected fixture accepts 12VAC and that the planned load fits the transformer’s circuit configuration. Its stainless steel NEMA 3R enclosure is intended for outdoor transformer installations.

This is a single-circuit model, so all connected fixture wattage counts toward the listed 300W maximum. The specifications show 12.8VAC at no load and 11.8VAC 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 EMS300S12AC?
This 300W 12VAC stainless steel transformer is intended for compatible low-voltage landscape or architectural lighting that accepts 12VAC power. The connected load must stay within the listed 300W capacity and 25A output-current limit.

Is the EMS300S12AC 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 stainless steel NEMA 3R 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