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

€ 103.49

€ 103.49 Each (ex VAT)

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

€ 156.51

€ 156.51 Each (ex VAT)

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

€ 216.30

€ 216.30 Each (ex VAT)

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1€ 216.30
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RS Pro
240 V ac
115 V ac
Enclosed
Wall
Terminal Block
-
1000VA
-
105°C
137mm
ASNZS 61558..1, ASNZS 61558.1, CE, IECBSEN 615581, RoHS
-
192 mm
115mm
8.8kg
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

€ 90.62

€ 90.62 Each (ex VAT)

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1€ 90.62
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RS Pro
240 V ac
115 V ac
Enclosed
Wall
Terminal Block
-
1000VA
-
105°C
137mm
ASNZS 61558..1, CE, IECBSEN 615581, RoHS, ASNZS 61558.1
-
192 mm
115mm
8.8kg
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

€ 375.81

€ 375.81 Each (ex VAT)

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1€ 375.81
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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
RoHS
10
192 mm
115mm
8.8kg
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

€ 123.72

€ 123.72 Each (ex VAT)

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1€ 123.72
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RS Pro
240 V ac
115 V ac
Enclosed
Wall
Terminal Block
-
1000VA
-
105°C
137mm
RoHS, IECBSEN 615581, CE, ASNZS 61558..1, ASNZS 61558.1
-
192 mm
115mm
8.8kg
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

€ 366.46

€ 366.46 Each (ex VAT)

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

€ 156.76

€ 156.76 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
117mm
DIN EN 61558-2-13, IEC 61558-2-13, VDE 0570 part 2-13, EN 61558-2-13
AIM
97 mm
223mm
5.00kg
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

€ 377.62

€ 377.62 Each (ex VAT)

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

€ 338.51

€ 338.51 Each (ex VAT)

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

€ 1,605.84

€ 1,605.84 Each (ex VAT)

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1€ 1,605.84
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Carroll & Meynell
380 V, 415 V, 400 V
380 V, 400 V, 415 V
-
-
-
-
30kVA
-
200°C
260mm
BSEN 61558-2-23
CMA
350 mm
420mm
20kg
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

€ 1,202.43

€ 1,202.43 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
-
-
325mm
RoHS
-
270 mm
420mm
-
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

€ 242.80

€ 242.80 Each (ex VAT)

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1€ 242.80
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Block
480 V, 500 V ac
400 V ac
Open Frame
Wall, Floor Standing, Chassis
Screw
-
2kVA
-
40°C
155mm
No
AT3
110 mm
155mm
6.1kg
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

€ 264.42

€ 264.42 Each (ex VAT)

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1€ 264.42
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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
-
22 mm
-
7.00kg
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

€ 520.37

€ 520.37 Each (ex VAT)

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1€ 520.37
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Block
460 V ac, 440 V
400 V ac
Open Frame
Wall, Chassis, Floor Standing
Screw
-
15kVA
-
40°C
215mm
C-UL-US
-
150 mm
267mm
20.10kg
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

€ 494.02

€ 494.02 Each (ex VAT)

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1€ 494.02
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Block
208 V ac
400 V ac
Open Frame
Wall, Floor Standing, Chassis
Screw
-
3.5kVA
-
40°C
220mm
No
AT3
150 mm
267mm
20kg
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

€ 513.99

€ 513.99 Each (ex VAT)

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1€ 513.99
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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
C-UL-US
-
150 mm
267mm
20.70kg
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

€ 435.75

€ 435.75 Each (ex VAT)

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1€ 435.75
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Block
440 V, 460 V ac
400 V ac
Open Frame
Wall, Floor Standing, Chassis
Screw
-
10kVA
-
40°C
215mm
CSA 22.2, IEC 61558-2-13, VDE 0532, VDE 0570 part 2-13, C-UL-US, UL 506, DIN EN 61558-2-13
AT3 10-44/46-4
125 mm
267mm
14.40kg
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

€ 251.44

€ 251.44 Each (ex VAT)

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1€ 251.44
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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
VDE 0532, DIN EN 61558-2-13, C-UL-US, IEC 61558-2-13, CSA 22.2, UL 506, VDE 0570 part 2-13
AT3
110 mm
155mm
6.10kg
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

€ 317.50

€ 317.50 Each (ex VAT)

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1€ 317.50
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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
DIN EN 61558-2-13, CSA 22.2, VDE 0532, IEC 61558-2-13, C-UL-US, UL 506, VDE 0570 part 2-13
-
115 mm
220mm
8.7kg