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

€ 131.78

€ 131.78 Each (Exc. Vat)

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1€ 131.78
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RS Pro
240 V ac
115 V ac
Enclosed
Wall
Terminal Block
-
1000VA
-
105°C
137mm
-
115mm
AS/NZS 61558.1, AS/NZS 61558.2.13, CE, IEC/BS/EN 61558-1, IEC/BS/EN 61558-2-13, RoHS
8.8kg
192 mm
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

€ 199.54

€ 199.54 Each (Exc. Vat)

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1€ 199.54
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RS Pro
240 V ac
115 V ac
Enclosed
Wall
Terminal Block
-
1000VA
-
105°C
137mm
-
115mm
IECBSEN 615581, ASNZS 61558.1, CE, ASNZS 61558..1, RoHS
8.8kg
192 mm
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

€ 276.10

€ 276.10 Each (Exc. Vat)

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1€ 276.10
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RS Pro
240 V ac
115 V ac
Enclosed
Wall
Terminal Block
-
1000VA
-
105°C
137mm
-
115mm
ASNZS 61558..1, ASNZS 61558.1, CE, IECBSEN 615581, RoHS
8.8kg
192 mm
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

€ 115.46

€ 115.46 Each (Exc. Vat)

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1€ 115.46
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RS Pro
240 V ac
115 V ac
Enclosed
Wall
Terminal Block
-
1000VA
-
105°C
137mm
-
115mm
ASNZS 61558..1, CE, IECBSEN 615581, RoHS, ASNZS 61558.1
8.8kg
192 mm
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

€ 479.41

€ 479.41 Each (Exc. Vat)

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1€ 479.41
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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
137mm
10
115mm
RoHS
8.8kg
192 mm
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

€ 158.13

€ 158.13 Each (Exc. Vat)

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1€ 158.13
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RS Pro
240 V ac
115 V ac
Enclosed
Wall
Terminal Block
-
1000VA
-
105°C
137mm
-
115mm
RoHS, IECBSEN 615581, CE, ASNZS 61558..1, ASNZS 61558.1
8.8kg
192 mm
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

€ 468.12

€ 468.12 Each (Exc. Vat)

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1€ 468.12
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Carroll & Meynell
230 V ac
115 V ac
DMC
-
-
-
2kVA
-
200°C
190mm
-
205mm
No
20kg
260 mm
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

€ 200.80

€ 200.80 Each (Exc. Vat)

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1€ 200.80
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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
117mm
AIM
223mm
DIN EN 61558-2-13, IEC 61558-2-13, VDE 0570 part 2-13, EN 61558-2-13
5.00kg
97 mm
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

€ 481.92

€ 481.92 Each (Exc. Vat)

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1€ 481.92
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Carroll & Meynell
230 V
114.1 V ac
DMC
-
-
-
3kVA
-
140°C
190mm
-
205mm
No
20kg
260 mm
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

€ 432.98

€ 432.98 Each (Exc. Vat)

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1€ 432.98
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Carroll & Meynell
230 V ac
114.2 V ac
Encapsulated
Surface
Plug-In
-
1kVA
Step Down
-
190mm
CM
205mm
RoHS
-
260 mm
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

€ 2,051.92

€ 2,051.92 Each (Exc. Vat)

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1€ 2,051.92
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Carroll & Meynell
380 V, 415 V, 400 V
380 V, 400 V, 415 V
-
-
-
-
30kVA
-
200°C
260mm
CMA
420mm
BSEN 61558-2-23
20kg
350 mm
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

€ 1,537.38

€ 1,537.38 Each (Exc. Vat)

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1€ 1,537.38
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Carroll & Meynell
400 V, 415 V, 380 V
415 V, 400 V, 380 V
Enclosed
Floor Standing
-
-
10kVA
-
-
325mm
-
420mm
RoHS
-
270 mm
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

€ 309.98

€ 309.98 Each (Exc. Vat)

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1€ 309.98
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Block
480 V, 500 V ac
400 V ac
Open Frame
Wall, Floor Standing, Chassis
Screw
-
2kVA
-
40°C
155mm
AT3
155mm
No
6.1kg
110 mm
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

€ 337.60

€ 337.60 Each (Exc. Vat)

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1€ 337.60
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Block
380 V, 415 V
3 x 400 V
Open Type
Bracket
Screw
-
1000VA
-
40°C
-
-
-
DIN EN 61558-2-13, UL 506, C-UL-US, CSA 22.2, IEC 61558-2-13, VDE 0570 part 2-13, VDE 0532
7.00kg
22 mm
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

€ 665.15

€ 665.15 Each (Exc. Vat)

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1€ 665.15
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Block
460 V ac, 440 V
400 V ac
Open Frame
Wall, Chassis, Floor Standing
Screw
-
15kVA
-
40°C
215mm
-
267mm
C-UL-US
20.10kg
150 mm
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
220mm
AT3
267mm
No
20kg
150 mm
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

€ 658.88

€ 658.88 Each (Exc. Vat)

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1€ 658.88
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Block
230 V ac, 220 V
400 V ac
Open Frame
Wall, Chassis, Floor Standing
Screw
-
3.5kVA
-
40°C
220mm
-
267mm
C-UL-US
20.70kg
150 mm
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

€ 555.96

€ 555.96 Each (Exc. Vat)

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1€ 555.96
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Block
440 V, 460 V ac
400 V ac
Open Frame
Wall, Floor Standing, Chassis
Screw
-
10kVA
-
40°C
215mm
AT3 10-44/46-4
267mm
CSA 22.2, IEC 61558-2-13, VDE 0532, VDE 0570 part 2-13, C-UL-US, UL 506, DIN EN 61558-2-13
14.40kg
125 mm
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

€ 321.28

€ 321.28 Each (Exc. Vat)

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1€ 321.28
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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
155mm
AT3
155mm
VDE 0532, DIN EN 61558-2-13, C-UL-US, IEC 61558-2-13, CSA 22.2, UL 506, VDE 0570 part 2-13
6.10kg
110 mm
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

€ 405.36

€ 405.36 Each (Exc. Vat)

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1€ 405.36
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Block
500 V ac, 480 V
400 V ac
Open Frame
Chassis, Floor Standing, Wall
Screw
-
3.5kVA
-
40°C
175mm
-
220mm
DIN EN 61558-2-13, CSA 22.2, VDE 0532, IEC 61558-2-13, C-UL-US, UL 506, VDE 0570 part 2-13
8.7kg
115 mm