Input Voltage Input Voltage |
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Power Output Power Output |
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Input Wire Connection Type Input Wire Connection Type |
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Width Width |
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Depth Depth |
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Output Wire Connection Type Output WireConnection Type |
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Height Height |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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About AC to AC Voltage Transformers
For single-phase equipment, use this formula to find power output: VA = Volts × Amps
For three-phase equipment, use this formula to find power output: VA = Volts × Amps × 1.73
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Enclosed Isolating AC to AC Transformers
Single Phase with Plug and Socket
Single Phase
Three Phase
These transformers have isolated primary and secondary coils to protect your sensitive equipment from input voltage spikes.
Three phase transformers have Wye wiring for output voltage.
Sealed coils and cores prevent corrosion and insulation damage.
When wired as constant voltage transformers, they filter out voltage spikes and electrical noise.
Transformers that cannot be sold to California are restricted by local energy efficiency regulations.
Single Phase—Plug Input and Socket Output
NEMA 5-15 Plug
NEMA 5-15 Socket
NEMA 6-15 Plug
Voltage | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Input | Output | Power Output, VA | Input Plug Type (NEMA Style) | Output Socket Type (NEMA Style) | Ht. | Wd. | Dp. | Features | Each | |
Constant Voltage | ||||||||||
| 115V AC | 115V AC | 150 | Three Prong (5-15) | Three Slot (5-15) | 3.9" | 3.1" | 4.2" | Isolated Coils | 00000000 | 0000000 |
| 115V AC | 115V AC | 250 | Three Prong (5-15) | Three Slot (5-15) | 4.7" | 3.8" | 4.4" | Isolated Coils | 00000000 | 000000 |
| 115V AC | 115V AC | 500 | Three Prong (5-15) | Three Slot (5-15) | 4.7" | 3.8" | 6" | Isolated Coils | 00000000 | 000000 |
| 115V AC | 115V AC | 1,000 | Three Prong (5-15) | Three Slot (5-15) | 5.4" | 4.4" | 8.1" | Isolated Coils | 00000000 | 000000 |
Step Down Voltage | ||||||||||
| 230V AC | 115V AC | 100 | Three Prong (6-15) | Three Slot (5-15) | 3 1/2" | 2.8" | 3.6" | Isolated Coils | 00000000 | 000000 |
| 230V AC | 115V AC | 250 | Three Prong (6-15) | Three Slot (5-15) | 4.7" | 3.8" | 4.4" | Isolated Coils | 00000000 | 000000 |
| 230V AC | 115V AC | 500 | Three Prong (6-15) | Three Slot (5-15) | 4.7" | 3.8" | 6" | Isolated Coils | 00000000 | 000000 |
| 230V AC | 115V AC | 1,000 | Three Prong (6-15) | Three Slot (5-15) | 5.4" | 4.4" | 8.1" | Isolated Coils | 00000000 | 000000 |
Single Phase—Wire Leads Input and Output
Voltage | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Input | Output | Power Output, VA | Ht. | Wd. | Dp. | Features | Environment | Environmental Rating | Specifications Met | Each | |
Step Up/Step Down/Constant Voltage | |||||||||||
| 120V AC, 240V AC | 120V AC, 240V AC | 1,000 | 10 1/2" | 5 1/2" | 5.1" | Isolated Coils, Sealed Coils, Sealed Cores | Outdoor | NEMA 3R | UL Listed, C-UL Listed | 0000000 | 0000000 |
| 120V AC, 240V AC | 120V AC, 240V AC | 2,000 | 13" | 5 1/2" | 5.1" | Isolated Coils, Sealed Coils, Sealed Cores | Outdoor | NEMA 3R | UL Listed, C-UL Listed | 0000000 | 000000 |
| 120V AC, 240V AC | 120V AC, 240V AC | 3,000 | 11 1/2" | 10.3" | 7.1" | Isolated Coils, Sealed Coils, Sealed Cores | Outdoor | NEMA 3R | UL Listed, C-UL Listed | 0000000 | 000000 |
| 120V AC, 240V AC | 120V AC, 240V AC | 5,000 | 14.4" | 10.3" | 7.1" | Isolated Coils, Sealed Coils, Sealed Cores | Outdoor | NEMA 3R | UL Listed, C-UL Listed | 0000000 | 000000 |
Step Down/Constant Voltage | |||||||||||
| 240V AC, 480V AC | 120V AC, 240V AC | 750 | 11.3" | 5.3" | 6 1/2" | Isolated Coils, Sealed Coils, Sealed Cores | Outdoor | NEMA 3R | UL Listed, C-UL Listed | 0000000 | 000000 |
| 240V AC, 480V AC | 120V AC, 240V AC | 1,000 | 11.3" | 5.3" | 6 1/2" | Isolated Coils, Sealed Coils, Sealed Cores | Outdoor | NEMA 3R | UL Listed, C-UL Listed | 0000000 | 000000 |
| 240V AC, 480V AC | 120V AC, 240V AC | 1,500 | 13.3" | 6.3" | 7.8" | Isolated Coils, Sealed Coils, Sealed Cores | Outdoor | NEMA 3R | UL Listed, C-UL Listed | 0000000 | 000000 |
| 240V AC, 480V AC | 120V AC, 240V AC | 3,000 | 13.3" | 6.3" | 7.8" | Isolated Coils, Sealed Coils, Sealed Cores | Outdoor | NEMA 3R | UL Listed, C-UL Listed | 0000000 | 000000 |
| 240V AC, 480V AC | 120V AC, 240V AC | 5,000 | 15" | 10.2" | 10.6" | Isolated Coils, Sealed Coils, Sealed Cores | Outdoor | NEMA 3R | UL Listed, C-UL Listed | 0000000 | 000000 |
| 240V AC, 480V AC | 120V AC, 240V AC | 7,500 | 15.2" | 13 1/2" | 10.8" | Isolated Coils, Sealed Coils, Sealed Cores | Outdoor | NEMA 3R | UL Listed, CSA Certified | 0000000 | 000000 |
| 240V AC, 480V AC | 120V AC, 240V AC | 10,000 | 15.2" | 13 1/2" | 10.8" | Isolated Coils, Sealed Coils, Sealed Cores | Outdoor | NEMA 3R | UL Listed, CSA Certified | 0000000 | 000000 |
| 240V AC, 480V AC | 120V AC, 240V AC | 15,000 | 16.9" | 14.1" | 11.6" | Isolated Coils, Sealed Coils, Sealed Cores | Outdoor | NEMA 3R | UL Listed, CSA Certified | 0000000 | 000000 |
| 240V AC, 480V AC | 120V AC, 240V AC | 25,000 | 18.4" | 16.1" | 13.3" | Isolated Coils, Sealed Coils, Sealed Cores | Outdoor | NEMA 3R | UL Listed, CSA Certified | 0000000 | 00000000 |
Three Phase—Wire Leads Input and Output
Voltage | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Input | Output | Power Output, VA | Ht. | Wd. | Dp. | Features | Environment | Environmental Rating | Specifications Met | Each | |
Step Down Voltage | |||||||||||
| 480V AC | 120V AC, 208V AC | 3,000 | 10.4" | 12.4" | 7 1/2" | Isolated Coils, Sealed Coils, Sealed Cores | Outdoor | NEMA 3R | UL Listed, CSA Certified | 0000000 | 0000000 |
| 480V AC | 120V AC, 208V AC | 6,000 | 11.8" | 14.2" | 8.8" | Isolated Coils, Sealed Coils, Sealed Cores | Outdoor | NEMA 3R | UL Listed, CSA Certified | 0000000 | 000000 |
| 480V AC | 120V AC, 208V AC | 9,000 | 14" | 17.8" | 11 1/2" | Isolated Coils, Sealed Coils, Sealed Cores | Outdoor | NEMA 3R | UL Listed, CSA Certified | 0000000 | 00000000 |
| 480V AC | 120V AC, 208V AC | 15,000 | 18.9" | 20.3" | 9" | Isolated Coils, Sealed Coils, Sealed Cores | Outdoor | NEMA 3R | UL Listed, CSA Certified | 0000000 | 00000000 |
Three Phase—Bus Bar Input and Output
Voltage | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Input | Output | Power Output, VA | Ht. | Wd. | Dp. | Features | Environment | Environmental Rating | Specifications Met | Cannot Be Sold To | Each | |
Step Down Voltage | ||||||||||||
| 480V AC | 120V AC, 208V AC | 30,000 | 25 1/2" | 24.4" | 19.4" | Isolated Coils, Sealed Coils, Sealed Cores | Outdoor | NEMA 3R | UL Listed, CSA Certified | CA | 0000000 | 000000000 |
| 480V AC | 120V AC, 208V AC | 45,000 | 25 1/2" | 24.4" | 19.4" | Isolated Coils, Sealed Coils, Sealed Cores | Outdoor | NEMA 3R | UL Listed, CSA Certified | CA | 0000000 | 00000000 |
| 480V AC | 120V AC, 208V AC | 75,000 | 29.4" | 28.2" | 22.4" | Isolated Coils, Sealed Coils, Sealed Cores | Outdoor | NEMA 3R | UL Listed, CSA Certified | CA | 0000000 | 00000000 |
Enclosed Step-Up/Step-Down AC to AC Transformers
Improve the efficiency of your equipment—wire these transformers to step your input voltage up or down by as much as 20%. Choose an input/output voltage combination that comes closest to matching your application, then choose the power output (in VA) of the equipment you want to operate. You probably won’t find the exact value you need; choose the next highest rating. Three-phase applications require two transformers.
Note: Transfomers are labeled with a prewired power output and pre-wired primary and secondary voltages. Single phase transformers are labeled as 120/240V AC primary voltage and 12/24V AC secondary voltage.Three phase transformers are labeled as 120/240V AC primary voltage and 16/32V AC secondary voltage. All possible input voltage and output voltage wiring combinations are listed.
Prewired | ||||||||
|---|---|---|---|---|---|---|---|---|
| Input/Output Voltage— Power Output | Power Output Label, VA | Primary Voltage Label | Secondary Voltage Label | Ht. | Wd. | Dp. | Each | |
Single Phase—Wire Leads Input and Output | ||||||||
Step Up/Step Down Voltage | ||||||||
| 100V AC/120V AC—250VA 110V AC/120V AC—500VA 125V AC/113V AC—520VA 132V AC/120V AC—540VA 189V AC/208V AC—430VA 208V AC/230V AC—480VA 220V AC/242V AC—500VA 230V AC/208V AC—470VA 245V AC/222V AC—500VA 252V AC/240V AC—1,020VA | 50 | 120V AC/240V AC | 12V AC/24V AC | 6.4" | 3.1" | 3.1" | 00000000 | 000000 |
| 100V AC/120V AC—500VA 110V AC/120V AC—1,010VA 125V AC/113V AC—1,040VA 132V AC/120V AC—1,080VA 189V AC/208V AC—870VA 208V AC/230V AC—960VA 220V AC/242V AC—1,010VA 230V AC/208V AC—950VA 245V AC/222V AC—1,000VA 252V AC/240V AC—2,040VA | 100 | 120V AC/240V AC | 12V AC/24V AC | 7.2" | 3.9" | 3.7" | 00000000 | 00000 |
| 100V AC/120V AC—750VA 110V AC/120V AC—1,510VA 125V AC/113V AC—1,560VA 132V AC/120V AC—1,620VA 189V AC/208V AC—1,300VA 208V AC/230V AC—1,430VA 220V AC/242V AC—1,510VA 230V AC/208V AC—1,420VA 245V AC/222V AC—1,500VA 252V AC/240V AC—3,000VA | 150 | 120V AC/240V AC | 12V AC/24V AC | 7.2" | 3.9" | 3.7" | 00000000 | 000000 |
| 100V AC/120V AC—1,250VA 110V AC/120V AC—2,500VA 125V AC/113V AC—2,600VA 132V AC/120V AC—2,750VA 189V AC/208V AC—2,160VA 208V AC/230V AC—2,390VA 220V AC/242V AC—2,520VA 230V AC/208V AC—2,370VA 245V AC/222V AC—2,500VA 252V AC/240V AC—5,100VA | 250 | 120V AC/240V AC | 12V AC/24V AC | 8.7" | 4.1" | 3.9" | 00000000 | 000000 |
| 100V AC/120V AC—2,500VA 110V AC/120V AC—5,000VA 125V AC/113V AC—5,200VA 132V AC/120V AC—5,400VA 189V AC/208V AC—4,330VA 208V AC/230V AC—4,790VA 220V AC/242V AC—5,040VA 230V AC/208V AC—4,470VA 245V AC/222V AC—5,000VA 252V AC/240V AC—10,200VA | 500 | 120V AC/240V AC | 12V AC/24V AC | 9.1" | 4.4" | 4.2" | 00000000 | 000000 |
| 100V AC/120V AC—3,750VA 110V AC/120V AC—7,560VA 125V AC/113V AC—7,800VA 132V AC/120V AC—8,150VA 189V AC/208V AC—6,500VA 208V AC/230V AC—7,190VA 220V AC/242V AC—7,560VA 230V AC/208V AC—7,100VA 245V AC/222V AC—7,500VA 252V AC/240V AC—15,300VA | 750 | 120V AC/240V AC | 12V AC/24V AC | 9.7" | 4.8" | 4.5" | 00000000 | 000000 |
| 100V AC/120V AC—5,000VA 110V AC/120V AC—10,000VA 125V AC/113V AC—10,400VA 132V AC/120V AC—10,800VA 189V AC/208V AC—8,660VA 208V AC/230V AC—9,580VA 220V AC/242V AC—10,000VA 230V AC/208V AC—9,500VA 245V AC/222V AC—10,000VA 252V AC/240V AC—20,400VA | 1,000 | 120V AC/240V AC | 12V AC/24V AC | 10.5" | 5.5" | 5.1" | 00000000 | 000000 |
Three Phase—Wire Leads Input and Output | ||||||||
Step Up/Step Down Voltage | ||||||||
| 195V AC/208V AC—5,630VA 208V AC/240V AC—3,170VA 225V AC/240V AC—6,500VA 240V AC/208V AC—2,810VA 245V AC/230V AC—6,630VA 256V AC/240V AC—6,930VA 265V AC/234V AC—3,590VA 272V AC/240V AC—3,680VA | 250 | 120V AC/240V AC | 16V AC/32V AC | 8.7" | 4.1" | 3.9" | 00000000 | 000000 |
| 195V AC/208V AC—11,260VA 208V AC/240V AC—6,330VA 225V AC/240V AC—12,990VA 240V AC/208V AC—5,630VA 245V AC/230V AC—13,260VA 256V AC/240V AC—13,860VA 265V AC/234V AC—7,170VA 272V AC/240V AC—7,360VA | 500 | 120V AC/240V AC | 16V AC/32V AC | 9.1" | 4.4" | 4.2" | 00000000 | 000000 |
| 195V AC/208V AC—16,890VA 208V AC/240V AC—9,500VA 225V AC/240V AC—19,490VA 240V AC/208V AC—8,440VA 245V AC/230V AC—19,890VA 256V AC/240V AC—20,780VA 265V AC/234V AC—10,760VA 272V AC/240V AC—11,040VA | 750 | 120V AC/240V AC | 16V AC/32V AC | 9.7" | 4.8" | 4.5" | 00000000 | 000000 |
| 195V AC/208V AC—22,520VA 208V AC/240V AC—12,670VA 225V AC/240V AC—25,980VA 240V AC/208V AC—11,260VA 245V AC/230V AC—26,520VA 256V AC/240V AC—27,710VA 265V AC/234V AC—14,340VA 272V AC/240V AC—14,720VA | 1,000 | 120V AC/240V AC | 16V AC/32V AC | 10.5" | 5.5" | 5.1" | 00000000 | 000000 |
Enclosed Voltage-Stabilizing AC to AC Transformers
Protect sensitive equipment from electromagnetic interference and maintain power during three-millisecond power dips. These transformers also isolate output and input voltage (output regulation is ±3% with input voltage fluctuations from +10% to -20%). When wired for constant voltage, transformers filter out voltage spikes and electrical noise.
Voltage | ||||||||
|---|---|---|---|---|---|---|---|---|
| Input | Output | Power Output, VA | Ht. | Wd. | Dp. | Specifications Met | Each | |
Single Phase—Screw Terminals Input and Output | ||||||||
Step Up/Step Down/Constant Voltage | ||||||||
| 120V AC, 208V AC, 240V AC, 480V AC | 120V AC, 208V AC, 240V AC | 140 | 4.4" | 6" | 8 1/2" | UL Listed, CSA Certified | 0000000 | 0000000 |
| 120V AC, 208V AC, 240V AC, 480V AC | 120V AC, 208V AC, 240V AC | 250 | 4.4" | 6" | 9.7" | UL Listed, CSA Certified | 0000000 | 000000 |
| 120V AC, 208V AC, 240V AC, 480V AC | 120V AC, 208V AC, 240V AC | 500 | 6 1/2" | 6.3" | 12.3" | UL Listed, CSA Certified | 0000000 | 000000 |
| 120V AC, 208V AC, 240V AC, 480V AC | 120V AC, 208V AC, 240V AC | 750 | 6 1/2" | 6.3" | 13.3" | UL Listed, CSA Certified | 0000000 | 00000000 |
| 120V AC, 208V AC, 240V AC, 480V AC | 120V AC, 208V AC, 240V AC | 1,000 | 6 1/2" | 6.3" | 14.2" | UL Listed, CSA Certified | 0000000 | 00000000 |
| 120V AC, 208V AC, 240V AC, 480V AC | 120V AC, 208V AC, 240V AC | 1,500 | 9.9" | 9.4" | 17.6" | UL Listed, CSA Certified | 0000000 | 00000000 |
| 120V AC, 208V AC, 240V AC, 480V AC | 120V AC, 208V AC, 240V AC | 3,000 | 9.9" | 9.4" | 19.9" | UL Listed, CSA Certified | 0000000 | 00000000 |