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

€ 132.79

€ 132.79 Each (ex VAT)

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RS Pro
240 V ac
115 V ac
Enclosed
Wall
Terminal Block
-
1000VA
-
105°C
8.8kg
115mm
-
192 mm
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

€ 200.81

€ 200.81 Each (ex VAT)

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RS Pro
240 V ac
115 V ac
Enclosed
Wall
Terminal Block
-
1000VA
-
105°C
8.8kg
115mm
-
192 mm
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

€ 277.52

€ 277.52 Each (ex VAT)

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RS Pro
240 V ac
115 V ac
Enclosed
Wall
Terminal Block
-
1000VA
-
105°C
8.8kg
115mm
-
192 mm
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

€ 116.27

€ 116.27 Each (ex VAT)

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RS Pro
240 V ac
115 V ac
Enclosed
Wall
Terminal Block
-
1000VA
-
105°C
8.8kg
115mm
-
192 mm
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

€ 482.18

€ 482.18 Each (ex VAT)

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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
8.8kg
115mm
10
192 mm
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

€ 158.73

€ 158.73 Each (ex VAT)

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1€ 158.73
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RS Pro
240 V ac
115 V ac
Enclosed
Wall
Terminal Block
-
1000VA
-
105°C
8.8kg
115mm
-
192 mm
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

€ 470.18

€ 470.18 Each (ex VAT)

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Carroll & Meynell
230 V ac
115 V ac
DMC
-
-
-
2kVA
-
200°C
20kg
205mm
-
260 mm
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

€ 201.14

€ 201.14 Each (ex VAT)

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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
5.00kg
223mm
AIM
97 mm
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

€ 484.50

€ 484.50 Each (ex VAT)

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Carroll & Meynell
230 V
114.1 V ac
DMC
-
-
-
3kVA
-
140°C
20kg
205mm
-
260 mm
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

€ 434.31

€ 434.31 Each (ex VAT)

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

€ 2,060.35

€ 2,060.35 Each (ex VAT)

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1€ 2,060.35
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Carroll & Meynell
380 V, 415 V, 400 V
380 V, 400 V, 415 V
-
-
-
-
30kVA
-
200°C
20kg
420mm
CMA
350 mm
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

€ 1,542.78

€ 1,542.78 Each (ex VAT)

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Carroll & Meynell
400 V, 415 V, 380 V
415 V, 400 V, 380 V
Enclosed
Floor Standing
-
-
10kVA
-
-
-
420mm
-
270 mm
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

€ 311.53

€ 311.53 Each (ex VAT)

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1€ 311.53
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Block
480 V, 500 V ac
400 V ac
Open Frame
Wall, Floor Standing, Chassis
Screw
-
2kVA
-
40°C
6.1kg
155mm
AT3
110 mm
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

€ 339.26

€ 339.26 Each (ex VAT)

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1€ 339.26
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Block
380 V, 415 V
3 x 400 V
Open Type
Bracket
Screw
-
1000VA
-
40°C
7.00kg
-
-
22 mm
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

€ 667.66

€ 667.66 Each (ex VAT)

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Block
460 V ac, 440 V
400 V ac
Open Frame
Wall, Chassis, Floor Standing
Screw
-
15kVA
-
40°C
20.10kg
267mm
-
150 mm
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

€ 633.86

€ 633.86 Each (ex VAT)

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1€ 633.86
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Block
208 V ac
400 V ac
Open Frame
Wall, Floor Standing, Chassis
Screw
-
3.5kVA
-
40°C
20kg
267mm
AT3
150 mm
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

€ 659.47

€ 659.47 Each (ex VAT)

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1€ 659.47
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Block
230 V ac, 220 V
400 V ac
Open Frame
Wall, Chassis, Floor Standing
Screw
-
3.5kVA
-
40°C
20.70kg
267mm
-
150 mm
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

€ 559.08

€ 559.08 Each (ex VAT)

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1€ 559.08
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Block
440 V, 460 V ac
400 V ac
Open Frame
Wall, Floor Standing, Chassis
Screw
-
10kVA
-
40°C
14.40kg
267mm
AT3 10-44/46-4
125 mm
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

€ 322.61

€ 322.61 Each (ex VAT)

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1€ 322.61
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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
6.10kg
155mm
AT3
110 mm
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

€ 407.37

€ 407.37 Each (ex VAT)

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1€ 407.37
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Block
500 V ac, 480 V
400 V ac
Open Frame
Chassis, Floor Standing, Wall
Screw
-
3.5kVA
-
40°C
8.7kg
220mm
-
115 mm
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