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Maddox 3-phase 480V delta to 208Y/120V step-down transformer, 300 kVA (MIT-DRY-107)

Model: MIT-DRY-107 · SKU: MIT-DRY-107

Prepared Nov 12, 2026

Find a specification

Common specifications

Device type	Step-down transformerSource [1, 2]
Input voltage	480 V deltaSource [1]
Output voltage	208Y/120 VSource [1]
Power	Not documented
Maximum output current	833 ASource [1]
Isolation	Not documented
Rated power (VA)	300,000 VACalculatedSource [1, 2]
AC configuration	3-phaseSource [1]
AC frequency	60 HzSource [1]
Battery voltage	Not documented
Balance current	Not documented
Connection	Not documented
Efficiency	Not documented
Communications	Not documented
Enclosure	Not documented
Safety listing	Not documented
Mounting	Not documented
Operating temperature	Not documented
Weight	855.02 kg1,885 lb convertedCalculatedSource [1]
Dimensions	939.8 D × 965.2 W × 1,320.8 H mm37 D × 38 W × 52 H inCalculatedSource [1]
Enclosure volume	1,198.09 L** Calculated from recorded external dimensions
Warranty term	5 yearsSource [1]

All recorded specifications

AC configuration	3-phaseDocumented claim Conditions Printed as "convert 3-phase 480v to 3-phase 208v/120" and in the product name "3-Phase 480V Delta - 208 Y 120". Location: Overview Printed as "convert 3-phase 480v to 3-phase 208v/120" and in the product name "3-Phase 480V Delta - 208 Y 120". Location: Overview Official product page · Maddox store product page: 3-Phase 480V Delta - 208 Y 120 (October 30, 2026 capture) [1]
AC frequency	60 HzDocumented claim Conditions Printed once for every size as "60 Hz Frequency". Location: Overview, Transformer Specifications Printed once for every size as "60 Hz Frequency". Location: Overview, Transformer Specifications Official product page · Maddox store product page: 3-Phase 480V Delta - 208 Y 120 (October 30, 2026 capture) [1]
Device type	Step-down transformerDocumented claim Conditions Maddox's store data tags the product's type as "Step down"; the page's overview says "This transformer is designed to convert 3-phase 480v to 3-phase 208v/120". Location: Store product data, tags; product page, Overview Maddox's store data tags the product's type as "Step down"; the page's overview says "This transformer is designed to convert 3-phase 480v to 3-phase 208v/120". Location: Store product data, tags; product page, Overview Official product feed · Maddox store product data: 3-Phase 480V Delta - 208 Y 120 (October 30, 2026 capture)Official product page · Maddox store product page: 3-Phase 480V Delta - 208 Y 120 (October 30, 2026 capture) [1, 2]
Dimensions	939.8 D × 965.2 W × 1,320.8 H mm37 D × 38 W × 52 H inCalculated52 x 38 x 37 in x 25.4 mm/in, rounded to 0.1 mm Conditions Printed as "300 52"x38"x37" 1885" under "Dimensions & Weights kVA Dimensions (HxWxD) Weight (lbs)", in inches, in a table Maddox labels "Approximate Enclosure Dimensions & Weights"; approximate enclosure figures. Location: Dimensions & Weights, 300 kVA row Printed as "300 52"x38"x37" 1885" under "Dimensions & Weights kVA Dimensions (HxWxD) Weight (lbs)", in inches, in a table Maddox labels "Approximate Enclosure Dimensions & Weights"; approximate enclosure figures. Location: Dimensions & Weights, 300 kVA row Official product page · Maddox store product page: 3-Phase 480V Delta - 208 Y 120 (October 30, 2026 capture) [1]
Input voltage	480 V deltaDocumented claim Conditions Printed once for every size as "Primary Voltage: 480 Delta". Location: Overview, Primary Voltage Printed once for every size as "Primary Voltage: 480 Delta". Location: Overview, Primary Voltage Official product page · Maddox store product page: 3-Phase 480V Delta - 208 Y 120 (October 30, 2026 capture) [1]
Maximum output current	833 ADocumented claim Conditions The size guide prints "300 361 833" under the headings "Size Guide kVA Amps at 480v Amps at 208 Y 120": 833 A at 208 Y 120 (the secondary) and 361 A at 480 V (the primary) for 300 kVA. It is the rated current of the size; Maddox prints no separate maximum. Location: Size Guide, 300 kVA row, Amps at 208 Y 120 The size guide prints "300 361 833" under the headings "Size Guide kVA Amps at 480v Amps at 208 Y 120": 833 A at 208 Y 120 (the secondary) and 361 A at 480 V (the primary) for 300 kVA. It is the rated current of the size; Maddox prints no separate maximum. Location: Size Guide, 300 kVA row, Amps at 208 Y 120 Official product page · Maddox store product page: 3-Phase 480V Delta - 208 Y 120 (October 30, 2026 capture) [1]
Output voltage	208Y/120 VDocumented claim Conditions Printed once for every size as "Secondary Voltage: 208 Y 120". Location: Overview, Secondary Voltage Printed once for every size as "Secondary Voltage: 208 Y 120". Location: Overview, Secondary Voltage Official product page · Maddox store product page: 3-Phase 480V Delta - 208 Y 120 (October 30, 2026 capture) [1]
Rated power (VA)	300,000 VACalculated300 kVA x 1000 VA/kVA = 300000 VA Conditions Printed as the size option "300 kVA" whose new, aluminum-winding variant carries SKU MIT-DRY-107. Location: Store product data, variant "300 kVA / New / Aluminum (standard)" (SKU MIT-DRY-107); product page, Size Guide Printed as the size option "300 kVA" whose new, aluminum-winding variant carries SKU MIT-DRY-107. Location: Store product data, variant "300 kVA / New / Aluminum (standard)" (SKU MIT-DRY-107); product page, Size Guide Official product feed · Maddox store product data: 3-Phase 480V Delta - 208 Y 120 (October 30, 2026 capture)Official product page · Maddox store product page: 3-Phase 480V Delta - 208 Y 120 (October 30, 2026 capture) [1, 2]
Weight	855.02 kg1,885 lb convertedCalculated1885 lb x 0.45359237 kg/lb, rounded to 0.01 kg Conditions Printed as 1885 lbs in the row "300 52"x38"x37" 1885" of a table Maddox labels "Approximate Enclosure Dimensions & Weights"; an approximate weight, printed in pounds only and converted. Location: Dimensions & Weights, 300 kVA row, Weight (lbs) Printed as 1885 lbs in the row "300 52"x38"x37" 1885" of a table Maddox labels "Approximate Enclosure Dimensions & Weights"; an approximate weight, printed in pounds only and converted. Location: Dimensions & Weights, 300 kVA row, Weight (lbs) Official product page · Maddox store product page: 3-Phase 480V Delta - 208 Y 120 (October 30, 2026 capture) [1]

Warranty

Warranty term	5 yearsDocumented claim Conditions Printed as "All new and used Maddox transformers are tested and come with a full 5 year warranty against defects." Location: Warranty Printed as "All new and used Maddox transformers are tested and come with a full 5 year warranty against defects." Location: Warranty Official product page · Maddox store product page: 3-Phase 480V Delta - 208 Y 120 (October 30, 2026 capture) [1]

Warranty term

5 yearsDocumented claim

Conditions

Printed as "All new and used Maddox transformers are tested and come with a full 5 year warranty against defects."

Location: Warranty

Printed as "All new and used Maddox transformers are tested and come with a full 5 year warranty against defects."

Location: Warranty

Official product page · Maddox store product page: 3-Phase 480V Delta - 208 Y 120 (October 30, 2026 capture)

[1]

Certificate records

No records documented.

Sources and revisions

Maddox store product page: 3-Phase 480V Delta - 208 Y 120 (October 30, 2026 capture)Official product page · Checked Oct 30, 2026https://store.maddox.com/products/3-phase-480v-delta-208-y-120
Maddox store product data: 3-Phase 480V Delta - 208 Y 120 (October 30, 2026 capture)Official product feed · Checked Oct 30, 2026https://store.maddox.com/products/3-phase-480v-delta-208-y-120.json