{"product_id":"em300s12ac277-300w-277v-outdoor-magnetic-12vac-transformer","title":"EM300S12AC277 300W 277V Outdoor Magnetic 12VAC Transformer","description":"\u003ch3\u003eEM300S12AC277 300W 277V Outdoor Magnetic 12VAC Transformer\u003c\/h3\u003e\n\u003cp\u003eThe EM300S12AC277 is a 300W outdoor magnetic AC transformer \/ LED driver configured for 277V commercial input and a single 12VAC output circuit. Its encapsulated transformer and black powder-coated NEMA 3R steel enclosure make it suited to compatible professional lighting installations that use 277V supply power.\u003c\/p\u003e\n\u003ch3\u003eWhy Choose the EM300S12AC277?\u003c\/h3\u003e\n\u003cp\u003e✔ \u003cstrong\u003e277V Commercial Input\u003c\/strong\u003e\u003cbr\u003eDesigned for 277V 60Hz input applications where standard 120V transformers are not appropriate.\u003c\/p\u003e\n\u003cp\u003e✔ \u003cstrong\u003e300W 12VAC Output\u003c\/strong\u003e\u003cbr\u003eProvides up to 300W of single-circuit 12VAC low voltage power.\u003c\/p\u003e\n\u003cp\u003e✔ \u003cstrong\u003eOutdoor NEMA 3R Enclosure\u003c\/strong\u003e\u003cbr\u003eBlack powder-coated steel enclosure protects the encapsulated magnetic transformer.\u003c\/p\u003e\n\u003cp\u003e✔ \u003cstrong\u003eCertified Construction\u003c\/strong\u003e\u003cbr\u003eConforms to UL 2108 and is certified to CSA C22.2 No. 250.0.\u003c\/p\u003e\n\u003ch3\u003eElectrical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Voltage:\u003c\/strong\u003e 277V 60Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax. Input Current:\u003c\/strong\u003e 2.8A at full load\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Voltage - No Load:\u003c\/strong\u003e 12.7VAC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Voltage - Fully Loaded:\u003c\/strong\u003e 11.5VAC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax. Total Wattage:\u003c\/strong\u003e 300W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax. Output Current:\u003c\/strong\u003e 25A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency:\u003c\/strong\u003e 93%\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eConstruction \u0026amp; Certification\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnclosure:\u003c\/strong\u003e Black powder-coated steel, outdoor NEMA 3R\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransformer Construction:\u003c\/strong\u003e Encapsulated magnetic transformer with separated primary and secondary windings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertification:\u003c\/strong\u003e Conforms to UL 2108; certified to CSA C22.2 No. 250.0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecondary Breaker:\u003c\/strong\u003e 25A manually reset\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 8 × 4.1 × 3.24 in\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow to Select the 300W 277V 12VAC outdoor magnetic transformer\u003c\/h3\u003e\n\u003cp\u003eChoose the EM300S12AC277 when a project requires a 300W 277V 12VAC outdoor magnetic transformer and the available supply matches 277V 60Hz. Confirm that every connected fixture accepts 12VAC 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.\u003c\/p\u003e\n\u003cp\u003eThis is a single-circuit model, so all connected fixture wattage counts toward the listed 300W maximum. The specifications show 12.7VAC at no load and 11.5VAC 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.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat lighting systems can use the EM300S12AC277?\u003c\/strong\u003e\u003cbr\u003eThis 300W 277V 12VAC outdoor magnetic 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.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the EM300S12AC277 dimmable?\u003c\/strong\u003e\u003cbr\u003eDimming is not listed as a feature in the supplied product data. Confirm dimmer compatibility in the EMCOD specification sheet before designing a dimming system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan this transformer be installed outdoors?\u003c\/strong\u003e\u003cbr\u003eYes. 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.\u003c\/p\u003e\n\u003cp\u003eCompare voltage, capacity, circuit and enclosure options in our \u003ca href=\"\/collections\/transformer\"\u003elow-voltage landscape lighting transformer collection\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOfficial EMCOD Specification Sheet:\u003c\/strong\u003e \u003ca href=\"https:\/\/www.emcod.com\/products\/info\/download?spec_sheet=381\" target=\"_blank\" rel=\"noopener\"\u003eDownload PDF\u003c\/a\u003e\u003c\/p\u003e","brand":"EMCOD","offers":[{"title":"Default Title","offer_id":50902783721715,"sku":"EM300S12AC277","price":189.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/5752\/7795\/files\/Capturadepantalla2026-09-06ala_s_10.35.26p.m..png?v=1788755734","url":"https:\/\/shopluminouslighting.com\/products\/em300s12ac277-300w-277v-outdoor-magnetic-12vac-transformer","provider":"Luminous Landscape LLC","version":"1.0","type":"link"}