{"source":"https://padmountsupply.com","sourcePage":"https://padmountsupply.com/data","publisher":"Padmount Supply LLC","asOf":"24 September 2026","licence":"Free to use and cite with a link to the source page.","supplyBase":{"totalManufacturers":172,"taaEligible":32,"taaPercent":19,"countryCount":24,"byCountry":[{"country":"China","code":"CN","manufacturers":71},{"country":"United States","code":"US","manufacturers":39},{"country":"South Korea","code":"KR","manufacturers":13},{"country":"Unstated","code":"XX","manufacturers":8},{"country":"India","code":"IN","manufacturers":5},{"country":"Colombia","code":"CO","manufacturers":4},{"country":"Turkey","code":"TR","manufacturers":4},{"country":"Taiwan","code":"TW","manufacturers":4},{"country":"Italy","code":"IT","manufacturers":3},{"country":"Canada","code":"CA","manufacturers":2},{"country":"Spain","code":"ES","manufacturers":2},{"country":"Mexico","code":"MX","manufacturers":2},{"country":"United Arab Emirates","code":"AE","manufacturers":2},{"country":"Malaysia","code":"MY","manufacturers":2},{"country":"Brazil","code":"BR","manufacturers":1},{"country":"Germany","code":"DE","manufacturers":1},{"country":"Ecuador","code":"EC","manufacturers":1},{"country":"Indonesia","code":"ID","manufacturers":1},{"country":"Saudi Arabia","code":"SA","manufacturers":1},{"country":"FI","code":"FI","manufacturers":1},{"country":"HU","code":"HU","manufacturers":1},{"country":"PL","code":"PL","manufacturers":1},{"country":"Pakistan","code":"PK","manufacturers":1},{"country":"Thailand","code":"TH","manufacturers":1},{"country":"Vietnam","code":"VN","manufacturers":1}]},"findings":["172 companies hold a UL listing to build liquid-filled pad-mounted distribution transformers for the US market.","Only 32 of those 172, about 19 percent, are TAA eligible, which is what federal work requires.","71 of the 172 listed manufacturers are in China, about 41 percent of the global supply base.","Just 39 of the 172 are US manufacturers.","The Section 232 transitional rate on grid equipment, 15 percent rather than 50, expires on 31 December 2027.","DOE 2016 efficiency under 10 CFR Part 431 stays mandatory until April 2029, so stock bought today remains compliant."],"ratings":[{"kva":45,"slug":"45-kva-pad-mounted-transformer","cabinetInches":"48 x 46 x 52","weightLb":"1,350","impedancePercent":"3.5","secondaryAmps480Y277":"54","typicalUse":"Small retail pad, well pump, cell site","url":"https://padmountsupply.com/transformers/45-kva-pad-mounted-transformer"},{"kva":75,"slug":"75-kva-pad-mounted-transformer","cabinetInches":"52 x 50 x 55","weightLb":"1,750","impedancePercent":"4.0","secondaryAmps480Y277":"90","typicalUse":"Strip retail, small office, restaurant","url":"https://padmountsupply.com/transformers/75-kva-pad-mounted-transformer"},{"kva":112,"slug":"112-5-kva-pad-mounted-transformer","cabinetInches":"55 x 52 x 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block","url":"https://padmountsupply.com/transformers/300-kva-pad-mounted-transformer"},{"kva":500,"slug":"500-kva-pad-mounted-transformer","cabinetInches":"72 x 66 x 72","weightLb":"4,900","impedancePercent":"5.5","secondaryAmps480Y277":"601","typicalUse":"Manufacturing plant, large retail","url":"https://padmountsupply.com/transformers/500-kva-pad-mounted-transformer"},{"kva":750,"slug":"750-kva-pad-mounted-transformer","cabinetInches":"80 x 72 x 78","weightLb":"6,600","impedancePercent":"5.75","secondaryAmps480Y277":"902","typicalUse":"Heavy industrial, small data hall","url":"https://padmountsupply.com/transformers/750-kva-pad-mounted-transformer"},{"kva":1000,"slug":"1000-kva-pad-mounted-transformer","cabinetInches":"86 x 76 x 82","weightLb":"8,200","impedancePercent":"5.75","secondaryAmps480Y277":"1,203","typicalUse":"Industrial plant, data centre feed","url":"https://padmountsupply.com/transformers/1000-kva-pad-mounted-transformer"},{"kva":1500,"slug":"1500-kva-pad-mounted-transformer","cabinetInches":"96 x 84 x 90","weightLb":"11,500","impedancePercent":"6.0","secondaryAmps480Y277":"1,804","typicalUse":"Large industrial, campus feed","url":"https://padmountsupply.com/transformers/1500-kva-pad-mounted-transformer"},{"kva":2000,"slug":"2000-kva-pad-mounted-transformer","cabinetInches":"104 x 90 x 96","weightLb":"14,500","impedancePercent":"6.0","secondaryAmps480Y277":"2,406","typicalUse":"Large data centre, heavy plant","url":"https://padmountsupply.com/transformers/2000-kva-pad-mounted-transformer"},{"kva":2500,"slug":"2500-kva-pad-mounted-transformer","cabinetInches":"112 x 96 x 102","weightLb":"17,500","impedancePercent":"6.0","secondaryAmps480Y277":"3,007","typicalUse":"Top of the C57.12.34 range","url":"https://padmountsupply.com/transformers/2500-kva-pad-mounted-transformer"}],"manufacturers":[{"name":"Maddox Industrial Transformer","slug":"maddox-transformer","country":"US","kind":"stocking","url":"https://padmountsupply.com/manufacturers/maddox-transformer"},{"name":"Virginia Transformer Corp","slug":"virginia-transformer","country":"US","kind":"factory","url":"https://padmountsupply.com/manufacturers/virginia-transformer"},{"name":"ERMCO","slug":"ermco","country":"US","kind":"factory","url":"https://padmountsupply.com/manufacturers/ermco"},{"name":"Central Moloney","slug":"central-moloney","country":"US","kind":"factory","url":"https://padmountsupply.com/manufacturers/central-moloney"},{"name":"Sunbelt Solomon Services","slug":"sunbelt-solomon","country":"US","kind":"stocking","url":"https://padmountsupply.com/manufacturers/sunbelt-solomon"},{"name":"Prolec GE","slug":"prolec-ge","country":"MX","kind":"factory","url":"https://padmountsupply.com/manufacturers/prolec-ge"},{"name":"Hammond Power Solutions","slug":"hammond-power-solutions","country":"CA","kind":"factory","url":"https://padmountsupply.com/manufacturers/hammond-power-solutions"},{"name":"Howard Industries","slug":"howard-industries","country":"US","kind":"factory","url":"https://padmountsupply.com/manufacturers/howard-industries"},{"name":"GE Transformer","slug":"ge-transformer","country":"US","kind":"factory","url":"https://padmountsupply.com/manufacturers/ge-transformer"},{"name":"ABB","slug":"abb-transformer","country":"XX","kind":"oem","url":"https://padmountsupply.com/manufacturers/abb-transformer"},{"name":"Hitachi Energy USA","slug":"hitachi-energy","country":"US","kind":"oem","url":"https://padmountsupply.com/manufacturers/hitachi-energy"},{"name":"Eaton","slug":"eaton-transformer","country":"US","kind":"oem","url":"https://padmountsupply.com/manufacturers/eaton-transformer"},{"name":"Cooper Power Systems","slug":"cooper-power-systems","country":"US","kind":"oem","url":"https://padmountsupply.com/manufacturers/cooper-power-systems"},{"name":"Siemens","slug":"siemens-transformer","country":"XX","kind":"oem","url":"https://padmountsupply.com/manufacturers/siemens-transformer"},{"name":"Schneider Electric USA","slug":"schneider-electric","country":"US","kind":"oem","url":"https://padmountsupply.com/manufacturers/schneider-electric"},{"name":"T&R Electric Supply","slug":"t-and-r-electric","country":"US","kind":"stocking","url":"https://padmountsupply.com/manufacturers/t-and-r-electric"},{"name":"Solomon Corporation","slug":"solomon-corporation","country":"US","kind":"stocking","url":"https://padmountsupply.com/manufacturers/solomon-corporation"},{"name":"MGM Transformer Company","slug":"mgm-transformer","country":"US","kind":"factory","url":"https://padmountsupply.com/manufacturers/mgm-transformer"},{"name":"Vantran Industries","slug":"vantran","country":"US","kind":"factory","url":"https://padmountsupply.com/manufacturers/vantran"},{"name":"Niagara Transformer","slug":"niagara-transformer","country":"US","kind":"factory","url":"https://padmountsupply.com/manufacturers/niagara-transformer"},{"name":"Jefferson Electric","slug":"jefferson-electric","country":"US","kind":"factory","url":"https://padmountsupply.com/manufacturers/jefferson-electric"},{"name":"Federal Pacific Transformer","slug":"federal-pacific","country":"US","kind":"factory","url":"https://padmountsupply.com/manufacturers/federal-pacific"},{"name":"Delta Star","slug":"delta-star","country":"US","kind":"factory","url":"https://padmountsupply.com/manufacturers/delta-star"},{"name":"CORE Transformers","slug":"core-transformers","country":"US","kind":"factory","url":"https://padmountsupply.com/manufacturers/core-transformers"},{"name":"Olsun 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