EM500S12AC 500W Dual-Circuit Outdoor Magnetic 12/24VAC Transformer

EM500S12AC 500W Dual-Circuit Outdoor Magnetic 12/24VAC Transformer

The EM500S12AC is a 500W outdoor magnetic AC transformer designed for higher-capacity low voltage lighting systems. Its dual-circuit 12/24VAC configuration provides up to 250W per circuit, allowing power to be distributed across two protected lighting circuits inside a durable NEMA 3R steel enclosure.

Why Choose the EM500S12AC?

✔ 500W Total Capacity
Supports up to 500W total load, with a maximum of 250W per circuit.

✔ Dual 12/24VAC Circuits
Provides two protected output circuits for flexible load distribution in larger lighting systems.

✔ Outdoor NEMA 3R Enclosure
Black powder-coated steel housing protects the encapsulated transformer.

✔ Dedicated Circuit Protection
A manually reset primary breaker and separate 25A secondary breakers protect the two output circuits.

Electrical Specifications

• Input Voltage: 120V 60Hz
• Max. Input Current: 5A at full load
• Output Voltage - No Load: 12.4 / 24.8VAC
• Output Voltage - Fully Loaded: 11.8 / 23.8VAC
• Max. Total Wattage: 500W total
• Max. Wattage Per Circuit: 250W
• Max. Output Current: 20.8 / 10.4A per circuit
• Efficiency: 93%
• Load Regulation: 0.05%

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: 7A manually reset
• Secondary Breakers: 25A per circuit, manually reset
• Dimensions: 9.4 × 4.6 × 4.1 in

How to Select the 500W dual-circuit 12/24VAC outdoor magnetic transformer

Choose the EM500S12AC when a project requires a 500W dual-circuit 12/24VAC outdoor magnetic transformer and the available supply matches 120V 60Hz. Confirm that every connected fixture accepts 12/24VAC 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 model uses a dual-circuit configuration with a listed limit of 250W per circuit; distribute fixture loads so each circuit and the total system remain within their listed limits. The specifications show 12.4 / 24.8VAC at no load and 11.8 / 23.8VAC 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 EM500S12AC?
This 500W dual-circuit 12/24VAC outdoor magnetic transformer is intended for compatible low-voltage landscape or architectural lighting that accepts 12/24VAC power. The connected load must stay within the listed 500W capacity and 20.8 / 10.4A per circuit output-current limit.

Is the EM500S12AC 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