Single-phase transformer 220 V / 110 V
Isolated 230 V → 115 V, for 110 to 120 V equipment · 63 VA to 20 kVA · IP00, IP23 or IP54 · made in France
5.0 · 5 reviews63 VA0.55 A at 115 V
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- 2-year warranty · wound and tested in Gailhan
Key features
This 220V to 110V transformer steps the 230 V mains — formerly 220 V — down to 115 volts AC, isolated from the supply: the voltage of devices designed for 110 to 120 V, such as American or Canadian equipment, tools, amplifiers and imported machines. The primary and secondary are two separate windings. From 63 VA to 20 kVA, open frame (IP00), with a ventilated cover (IP23) or in a sealed housing (IP54): it is wound and tested in our workshop in Gailhan, in the Gard (southern France).
A transformer changes the voltage, not the frequency: your equipment receives 115 V at 50 Hz. A device marked 50/60 Hz works; a device designed for 60 Hz only (clocks, some motors) may run more slowly or heat up.
This transformer isolates the 115 V from the mains. To plug in an everyday appliance that does not need isolation, the reversible 230 V ↔ 120 V autotransformer is enough, from €37.42 ex VAT.
A compressor or a motor-driven tool draws several times its power at start-up: leave some margin on the rating; the calculator above the table already applies 25 %.
When should you use a 220V to 110V transformer?
- American or Canadian equipment rated 110 to 120 V: tools, household appliances, amplifiers.
- Imported industrial machines and equipment designed for 115 V.
- 110-115 V control circuits in the cabinets of imported machines.
- Test benches and equipment that need 115 V isolated from the mains.
It works on 50 and 60 Hz supplies, does not change the frequency and delivers AC.
Specifications of the 220 V / 110 V transformer (230 V / 115 V)
Values for the selected configuration: 63 VA · IP00.
- Voltage
- 230 V AC (formerly 220 V)
- Rated current
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- Terminals
- 1 (0 V) · 2 (230 V) · earth
- Recommended protection
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- On-load voltage
- 115 V AC
- No-load voltage
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- Rated current
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- Terminals
- 3 (0 V) · 4 (115 V)
- Recommended protection
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- Type
- Dry-type transformer, two separate windings
- Core
- EI laminations, flux density 1.2 T
- Insulation class
- H (180 °C)
- Temperature rise
- 50 °C, 40 °C maximum ambient
- Standards
- EN 61558-2-4 (isolating transformers)
- Electrostatic shield
- Fitted as standard, earthed
- Thermal protection
- On request
- IP rating
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- Overall dimensions L × W × H
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- Weight
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- Mounting
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- Altitude
- 3,000 m maximum
- Connection
- Screw terminals up to 55 A (6.3 kVA on this model), lugs above
From 10 to 20 kVA, losses and efficiency are available on request.
Ratings and prices
From 63 VA to 20 kVA. Above that, or for another voltage, on request.
| Rating | 115 V current | Primary fuse | 115 V protection | No-load / load losses | Efficiency | Weight | Dimensions (mm) | Price ex VAT |
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| 63 VA | 0.5 A | aM 2 A | aM 2 A | 2 / 3.4 W | 92.1 % | 1.5 kg | 75 × 68 × 73 | €47.42 |
| 100 VA | 0.9 A | aM 2 A | aM 2 A | 3 / 5.3 W | 92.0 % | 2 kg | 84 × 82 × 78 | €57.42 |
| 160 VA | 1.4 A | aM 2 A | aM 2 A | 4 / 7.5 W | 92.5 % | 2.5 kg | 96 × 89 × 87 | €63.25 |
| 200 VA | 1.7 A | aM 2 A | aM 2 A | 5 / 9.4 W | 93.0 % | 2.6 kg | 118 × 97 × 97 | €66.58 |
| 250 VA | 2.2 A | aM 2 A | aM 4 A | 6 / 9.9 W | 93.6 % | 3.9 kg | 108 × 95 × 100 | €78.25 |
| 300 VA | 2.6 A | aM 2 A | aM 4 A | 6 / 14.3 W | 93.3 % | 4 kg | 108 × 103 × 94 | €80.75 |
| 400 VA | 3.5 A | aM 2 A | aM 4 A | 8 / 15.3 W | 94.2 % | 6 kg | 126 × 122 × 108 | €102.42 |
| 500 VA | 4.3 A | aM 4 A | aM 6 A | 9 / 15.2 W | 95.2 % | 6.8 kg | 126 × 110 × 115 | €112.42 |
| 630 VA | 5.5 A | aM 4 A | aM 6 A | 11 / 24.1 W | 94.4 % | 9 kg | 150 × 124 × 126 | €132.42 |
| 750 VA | 6.5 A | aM 4 A | aM 8 A | 15 / 24.1 W | 94.8 % | 10.3 kg | 150 × 120 × 135 | €144.92 |
| 1 kVA | 8.7 A | aM 6 A | aM 10 A | 18 / 28.7 W | 95.3 % | 14 kg | 150 × 144 × 127 | €175.75 |
| 1.6 kVA | 13.9 A | aM 8 A | aM 16 A | 19 / 47.7 W | 95.8 % | 16.4 kg | 180 × 140 × 160 | €219.92 |
| 2 kVA | 17.4 A | aM 10 A | aM 20 A | 19 / 58.5 W | 96.1 % | 20 kg | 180 × 160 × 160 | €243.25 |
| 2.5 kVA | 21.7 A | aM 12 A | aM 25 A | 24 / 64.7 W | 96.4 % | 24 kg | 180 × 180 × 150 | €250.75 |
| 3 kVA | 26.1 A | aM 16 A | aM 32 A | 29 / 127.6 W | 94.8 % | 29 kg | 180 × 200 × 160 | €288.25 |
| 4 kVA | 34.8 A | aM 20 A | aM 40 A | 42 / 100.2 W | 96.5 % | 33 kg | 240 × 190 × 220 | €425.75 |
| 5 kVA | 43.5 A | aM 25 A | aM 50 A | 45 / 117.7 W | 96.7 % | 36 kg | 240 × 200 × 220 | €458.25 |
| 6.3 kVA | 54.8 A | aM 32 A | aM 63 A | 56 / 128.2 W | 97.1 % | 40 kg | 240 × 210 × 220 | €483.25 |
| 7.5 kVA | 65.2 A | aM 40 A | aM 80 A | 56 / 156.4 W | 97.2 % | 46 kg | 240 × 230 × 220 | €548.25 |
| 10 kVA | 87.0 A | aM 50 A | aM 100 A | —* | —* | 75 kg | 390 × 150 × 470 | €1,012.42 |
| 15 kVA | 130.4 A | aM 80 A | aM 160 A | —* | —* | 80 kg | 390 × 160 × 470 | €1,145.75 |
| 20 kVA | 173.9 A | aM 100 A | aM 200 A | —* | —* | 95 kg | 390 × 170 × 470 | €1,279.92 |
aM fuses sized for the rated current; alternatively, a type D circuit breaker of the same rating. * 10 to 20 kVA: catalogue weights and dimensions, losses on request.
Connection and dimensions
Extracts from the datasheet: diagram, terminal block and dimensions.
PDF · specifications, ratings and part numbers, protection
Primary protection
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115 V protection
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As close as possible to the transformer, on the 115 V outgoing circuit.
Safety
- Connection with the power off, by a qualified person.
- Earth connected before switching on.
- IP00: inside a closed cabinet or enclosure.
Standards, warranty and options
A standard transformer, made in Gailhan and also available in other voltages.
Frequently asked questions
About the 220 V / 110 V single-phase transformer (230 V / 115 V).
110 V, 115 V or 120 V: is this transformer suitable?
Yes, for equipment designed for 110 to 120 V: it delivers 115 V on load, about 121 V off load on the 63 VA and 118 V on the 1,000 VA. It is not suitable for Japanese 100 V equipment.
220V to 110V or 230V to 115V transformer: is it the same thing?
Yes: 220 V is the former name for the 230 V mains, and 110 V the name used for equipment designed for 110 to 120 V. This 220V to 110V transformer connects to a 230 V socket or circuit and delivers 115 V.
Will my American appliance work at 50 Hz?
The transformer delivers 50 Hz, the frequency of the French mains. Check the rating plate on the appliance: “50/60 Hz” is fine; if it says “60 Hz” only, a motor or a clock may run more slowly or heat up.
Which rating should I choose?
Add up the power of the equipment supplied at 110 V, multiply by 1.25 and take the next rating up: 400 W of equipment needs 500 VA; 1,200 W needs 1,500 VA, so a 1.6 kVA transformer. For a motor, allow a bigger margin.
Transformer or autotransformer?
This transformer separates the 115 V from the mains: it is the right choice for machines, sensitive electronics and professional installations. The 230 V ↔ 120 V autotransformer, without isolation, is more compact and cheaper for a household appliance.
How do I connect a 220V to 110V transformer?
The 230 V supply goes to terminals 1 (0 V) and 2 (230 V), and earth to the primary earth terminal; your 115 V equipment is fed from terminals 3 (0 V) and 4 (115 V). The connection diagram is on the datasheet.
What protection should I install?
On the primary, an aM fuse or a type D circuit breaker rated for the primary current: 2 A for the 63 VA, 6 A for the 1,000 VA. On the secondary, protection rated for the 115 V current: a 2 A aM fuse for the 63 VA, 10 A for the 1,000 VA. At switch-on, the transformer draws about twelve times its rated current; the protection rating for each size is given in the table.
And to go from 110 V to 230 V?
That calls for the reverse transformer, to connect a European appliance to a 110 V supply: the 110 V / 230 V transformer.
IP00, IP23 or IP54: which should I choose?
IP00: open-frame transformer, to be installed in a cabinet or enclosure. IP23: ventilated cover, for a dry room. IP54: moulded housing up to 630 VA, sealed enclosure above that, protected against dust and splashing water. All about IP ratings.
Customer reviews
Reviews posted by customers who bought this transformer (in French).
impeccable, livraison rapide, produit conforme et de qualité, que du bon.
J’attends sa mise en service mais m’a été recommandé
correspond parfaitement à mes attentes !
service client qui m'a guidé dans le bon choix du produit. je ne connaissais pas la "marge de sécurité". très à l'écoute. 5/5
Other 110 V solutions
The reversible autotransformer, the reverse direction (110 V → 230 V) and other voltages.