Autotransformers

An autotransformer, also known as a step-down transformer, is an electrical transformer with only one winding. The winding has at least 3 taps where electrical connections are made. Autotransformers have the benefit of being small, light and cheap compared to dual-winding transformers.

Autotransformers are used to step up or step down voltages in the 110V-115V-120V range and 220V-230V-240...

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RS PRO Enclosed 1000 VA Auto-Transformer, 240 V ac Primary, 115 V ac Secondary
RS PRO Enclosed 1000 VA Auto-Transformer, 240 V ac Primary, 115 V ac Secondary
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RS Stock No.: 504-183Brand: RS PRO

€ 133.03

€ 133.03 Each (Exc. Vat)

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1€ 133.03
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RS Pro
240 V ac
115 V ac
Enclosed
Wall
Terminal Block
-
-
1000VA
105°C
192 mm
115mm
-
8.8kg
AS/NZS 61558.1, AS/NZS 61558.2.13, CE, IEC/BS/EN 61558-1, IEC/BS/EN 61558-2-13, RoHS
137mm
RS PRO Enclosed 1000 VA Auto-Transformer, 240 V ac Primary, 115 V ac Secondary
RS PRO Enclosed 1000 VA Auto-Transformer, 240 V ac Primary, 115 V ac Secondary
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RS Stock No.: 504-199Brand: RS PRO

€ 202.06

€ 202.06 Each (Exc. Vat)

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1€ 202.06
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RS Pro
240 V ac
115 V ac
Enclosed
Wall
Terminal Block
-
-
1000VA
105°C
192 mm
115mm
-
8.8kg
IECBSEN 615581, ASNZS 61558.1, CE, ASNZS 61558..1, RoHS
137mm
RS PRO Enclosed 1000 VA Auto-Transformer, 240 V ac Primary, 115 V ac Secondary
RS PRO Enclosed 1000 VA Auto-Transformer, 240 V ac Primary, 115 V ac Secondary
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RS Stock No.: 504-195Brand: RS PRO

€ 278.61

€ 278.61 Each (Exc. Vat)

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1€ 278.61
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RS Pro
240 V ac
115 V ac
Enclosed
Wall
Terminal Block
-
-
1000VA
105°C
192 mm
115mm
-
8.8kg
ASNZS 61558..1, ASNZS 61558.1, CE, IECBSEN 615581, RoHS
137mm
RS PRO Enclosed 1000 VA Auto-Transformer, 240 V ac Primary, 115 V ac Secondary
RS PRO Enclosed 1000 VA Auto-Transformer, 240 V ac Primary, 115 V ac Secondary
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RS Stock No.: 504-202Brand: RS PRO

€ 116.72

€ 116.72 Each (Exc. Vat)

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1€ 116.72
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RS Pro
240 V ac
115 V ac
Enclosed
Wall
Terminal Block
-
-
1000VA
105°C
192 mm
115mm
-
8.8kg
ASNZS 61558..1, CE, IECBSEN 615581, RoHS, ASNZS 61558.1
137mm
RS PRO Enclosed 1 kVA Auto-Transformer, 220 V ac, 230 V ac, 240 V ac Primary, 115 V ac Secondary
RS PRO Enclosed 1 kVA Auto-Transformer, 220 V ac, 230 V ac, 240 V ac Primary, 115 V ac Secondary
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RS Stock No.: 504-206Brand: RS PRO

€ 484.43

€ 484.43 Each (Exc. Vat)

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1€ 484.43
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RS Pro
220 V ac, 230 V ac, 240 V ac
115 V ac
Enclosed
Chassis, Floor Standing, Wall
-
-
-
1kVA
105°C
192 mm
115mm
10
8.8kg
RoHS
137mm
RS PRO Enclosed 1000 VA Auto-Transformer, 240 V ac Primary, 115 V ac Secondary
RS PRO Enclosed 1000 VA Auto-Transformer, 240 V ac Primary, 115 V ac Secondary
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RS Stock No.: 504-189Brand: RS PRO

€ 159.38

€ 159.38 Each (Exc. Vat)

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1€ 159.38
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RS Pro
240 V ac
115 V ac
Enclosed
Wall
Terminal Block
-
-
1000VA
105°C
192 mm
115mm
-
8.8kg
RoHS, IECBSEN 615581, CE, ASNZS 61558..1, ASNZS 61558.1
137mm
Carroll & Meynell DMC 2 kVA Auto-Transformer, 230 V ac Primary, 115 V ac Secondary
Carroll & Meynell DMC 2 kVA Auto-Transformer, 230 V ac Primary, 115 V ac Secondary
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RS Stock No.: 347-6668Brand: Carroll & MeynellManufacturers Part No.: CM2000/A/US

€ 471.88

€ 471.88 Each (Exc. Vat)

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Carroll & Meynell
230 V ac
115 V ac
DMC
-
-
-
-
2kVA
200°C
260 mm
205mm
-
20kg
No
190mm
Block Enclosed Auto-Transformer, 230 V ac Primary, 220 V, 230 V ac, 115 V Secondary
Block Enclosed Auto-Transformer, 230 V ac Primary, 220 V, 230 V ac, 115 V Secondary
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RS Stock No.: 293-2678Brand: BlockManufacturers Part No.: AIM 5.0/2.5

€ 202.06

€ 202.06 Each (Exc. Vat)

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1€ 202.06
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Block
230 V ac
220 V, 230 V ac, 115 V
Enclosed
Panel
Screw
5 A
Autotransformer For Adjustment of The Voltage On The Input and Output Sides
-
40°C
97 mm
223mm
AIM
5.00kg
DIN EN 61558-2-13, IEC 61558-2-13, VDE 0570 part 2-13, EN 61558-2-13
117mm
Carroll & Meynell DMC 3 kVA Auto-Transformer, 230 V Primary, 114.1 V ac Secondary
Carroll & Meynell DMC 3 kVA Auto-Transformer, 230 V Primary, 114.1 V ac Secondary
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RS Stock No.: 436-8883Brand: Carroll & MeynellManufacturers Part No.: CM3000/A/US

€ 486.94

€ 486.94 Each (Exc. Vat)

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1€ 486.94
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Carroll & Meynell
230 V
114.1 V ac
DMC
-
-
-
-
3kVA
140°C
260 mm
205mm
-
20kg
No
190mm
Carroll & Meynell Encapsulated 1 kVA Auto-Transformer, 230 V ac Primary, 114.2 V ac Secondary
Carroll & Meynell Encapsulated 1 kVA Auto-Transformer, 230 V ac Primary, 114.2 V ac Secondary
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RS Stock No.: 347-6652Brand: Carroll & MeynellManufacturers Part No.: CM1000/A/US

€ 436.74

€ 436.74 Each (Exc. Vat)

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1€ 436.74
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Carroll & Meynell
230 V ac
114.2 V ac
Encapsulated
Surface
Plug-In
-
Step Down
1kVA
-
260 mm
205mm
CM
-
RoHS
190mm
Carroll & Meynell 30 kVA Auto-Transformer, 380 V, 415 V, 400 V Primary, 380 V, 400 V, 415 V Secondary
Carroll & Meynell 30 kVA Auto-Transformer, 380 V, 415 V, 400 V Primary, 380 V, 400 V, 415 V Secondary
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RS Stock No.: 436-8877Brand: Carroll & MeynellManufacturers Part No.: CMA30K/FM0

€ 2,070.75

€ 2,070.75 Each (Exc. Vat)

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1€ 2,070.75
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Carroll & Meynell
380 V, 415 V, 400 V
380 V, 400 V, 415 V
-
-
-
-
-
30kVA
200°C
350 mm
420mm
CMA
20kg
BSEN 61558-2-23
260mm
Carroll & Meynell Enclosed 10 kVA Auto-Transformer, 400 V, 415 V, 380 V Primary, 415 V, 400 V, 380 V Secondary
Carroll & Meynell Enclosed 10 kVA Auto-Transformer, 400 V, 415 V, 380 V Primary, 415 V, 400 V, 380 V Secondary
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RS Stock No.: 436-8861Brand: Carroll & MeynellManufacturers Part No.: CMA10K/FM0

€ 1,549.92

€ 1,549.92 Each (Exc. Vat)

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Carroll & Meynell
400 V, 415 V, 380 V
415 V, 400 V, 380 V
Enclosed
Floor Standing
-
-
-
10kVA
-
270 mm
420mm
-
-
RoHS
325mm
Block Open Frame 2 kVA Auto-Transformer, 480 V, 500 V ac Primary, 400 V ac Secondary
Block Open Frame 2 kVA Auto-Transformer, 480 V, 500 V ac Primary, 400 V ac Secondary
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RS Stock No.: 738-7806Brand: BlockManufacturers Part No.: AT3 2-48/50-4

€ 312.50

€ 312.50 Each (Exc. Vat)

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1€ 312.50
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Block
480 V, 500 V ac
400 V ac
Open Frame
Wall, Floor Standing, Chassis
Screw
-
-
2kVA
40°C
110 mm
155mm
AT3
6.1kg
No
155mm
Block Open Type 1000 VA Auto-Transformer, 380 V, 415 V Primary, 3 x 400 V Secondary
Block Open Type 1000 VA Auto-Transformer, 380 V, 415 V Primary, 3 x 400 V Secondary
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RS Stock No.: 738-7852Brand: BlockManufacturers Part No.: AT3 10-38/42-4

€ 341.36

€ 341.36 Each (Exc. Vat)

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1€ 341.36
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Block
380 V, 415 V
3 x 400 V
Open Type
Bracket
Screw
-
-
1000VA
40°C
22 mm
-
-
7.00kg
DIN EN 61558-2-13, UL 506, C-UL-US, CSA 22.2, IEC 61558-2-13, VDE 0570 part 2-13, VDE 0532
-
Block Open Frame 15 kVA Auto-Transformer, 460 V ac, 440 V Primary, 400 V ac Secondary
Block Open Frame 15 kVA Auto-Transformer, 460 V ac, 440 V Primary, 400 V ac Secondary
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RS Stock No.: 738-7880Brand: BlockManufacturers Part No.: AT3 15-44/46-4

€ 671.42

€ 671.42 Each (Exc. Vat)

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1€ 671.42
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Block
460 V ac, 440 V
400 V ac
Open Frame
Wall, Chassis, Floor Standing
Screw
-
-
15kVA
40°C
150 mm
267mm
-
20.10kg
C-UL-US
215mm
Block Open Frame 3.5 kVA Auto-Transformer, 208 V ac Primary, 400 V ac Secondary
Block Open Frame 3.5 kVA Auto-Transformer, 208 V ac Primary, 400 V ac Secondary
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RS Stock No.: 738-7812Brand: BlockManufacturers Part No.: AT3 3,5-20/21-4

€ 633.78

€ 633.78 Each (Exc. Vat)

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1€ 633.78
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Block
208 V ac
400 V ac
Open Frame
Wall, Floor Standing, Chassis
Screw
-
-
3.5kVA
40°C
150 mm
267mm
AT3
20kg
No
220mm
Block Open Frame 3.5 kVA Auto-Transformer, 230 V ac, 220 V Primary, 400 V ac Secondary
Block Open Frame 3.5 kVA Auto-Transformer, 230 V ac, 220 V Primary, 400 V ac Secondary
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RS Stock No.: 738-7821Brand: BlockManufacturers Part No.: AT3 3,5-22/23-4

€ 665.15

€ 665.15 Each (Exc. Vat)

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1€ 665.15
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Block
230 V ac, 220 V
400 V ac
Open Frame
Wall, Chassis, Floor Standing
Screw
-
-
3.5kVA
40°C
150 mm
267mm
-
20.70kg
C-UL-US
220mm
Block Open Frame 10 kVA Auto-Transformer, 440 V, 460 V ac Primary, 400 V ac Secondary
Block Open Frame 10 kVA Auto-Transformer, 440 V, 460 V ac Primary, 400 V ac Secondary
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RS Stock No.: 738-7856Brand: BlockManufacturers Part No.: AT3 10-44/46-4

€ 562.24

€ 562.24 Each (Exc. Vat)

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1€ 562.24
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Block
440 V, 460 V ac
400 V ac
Open Frame
Wall, Floor Standing, Chassis
Screw
-
-
10kVA
40°C
125 mm
267mm
AT3 10-44/46-4
14.40kg
CSA 22.2, IEC 61558-2-13, VDE 0532, VDE 0570 part 2-13, C-UL-US, UL 506, DIN EN 61558-2-13
215mm
Block Open Frame 3.5 kVA Auto-Transformer, 3 x 440 V ac, 460 V ac Primary, 400 V ac Secondary
Block Open Frame 3.5 kVA Auto-Transformer, 3 x 440 V ac, 460 V ac Primary, 400 V ac Secondary
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RS Stock No.: 738-7837Brand: BlockManufacturers Part No.: AT3 3,5-44/46-4

€ 323.79

€ 323.79 Each (Exc. Vat)

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1€ 323.79
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Block
3 x 440 V ac, 460 V ac
400 V ac
Open Frame
Wall, Chassis, Floor Standing
Screw
-
-
3.5kVA
40°C
110 mm
155mm
AT3
6.10kg
VDE 0532, DIN EN 61558-2-13, C-UL-US, IEC 61558-2-13, CSA 22.2, UL 506, VDE 0570 part 2-13
155mm
Block Open Frame 3.5 kVA Auto-Transformer, 500 V ac, 480 V Primary, 400 V ac Secondary
Block Open Frame 3.5 kVA Auto-Transformer, 500 V ac, 480 V Primary, 400 V ac Secondary
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RS Stock No.: 738-7830Brand: BlockManufacturers Part No.: AT3 3,5-48/50-4

€ 409.13

€ 409.13 Each (Exc. Vat)

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1€ 409.13
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Block
500 V ac, 480 V
400 V ac
Open Frame
Chassis, Floor Standing, Wall
Screw
-
-
3.5kVA
40°C
115 mm
220mm
-
8.7kg
DIN EN 61558-2-13, CSA 22.2, VDE 0532, IEC 61558-2-13, C-UL-US, UL 506, VDE 0570 part 2-13
175mm