Toroidal Transformers

Toroidal transformers are magnetic core transformers manufactured within a toroidal (ring or doughnut) shape.

How do Toroidal Transformers they work?


Transformers use the principles of induction to transfer energy in the form of electricity via their internal coli. They make it possible for devices with different requirements to run off the same source of voltage. They are able to step the voltage up or down as needed. They can also increase and decrease current and alter electrical energy in other ways.
Toroidal transformers can be open or encapsulated, and some models are completed with PCB mounting pins.

Benefits of Toroidal Transformers


  • Transformers take up less space than their traditional square counterparts using less real estate. Some manufacturers suggest that fitting a toroidal transformer with flying leads instead of terminal blocks can save you up to 60% space.

  • These transformers are easy to mount, some even just require a single bolt to fix them in place.

  • They have flexible dimensions.

  • Toroidal transformers offer great noise reduction and emit less EMI (electromagnetic interference) than standard transformers.

  • They have a low stray field.

  • They are quieter to run than standard transformers and create less hum noise.

  • They present excellent value for money. Toroidal cores take less energy to maintain a magnetic field, and therefore use less power.

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Description Price Primary Voltage Rating Secondary Voltage Rating Power Rating Number of Outputs Secondary Current Height Weight Diameter Dimensions Minimum Operating Frequency Maximum Operating Frequency Mounting Type Termination Type Fixing Hole Diameter
RS Stock No. 752-9393
Mfr. Part No.RKD 400/2x18
BrandBlock
$111.86
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units
115V ac, 230V ac 2 x 18V ac 400VA 2 - - 4.1kg 128mm - 50Hz 60Hz - Leads -
RS Stock No. 752-9292
Mfr. Part No.RKD 20/2x12
BrandBlock
$63.53
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115 V ac, 230 V ac 2 x 12V ac 20VA 2 - - 350g 61mm - 50Hz 60Hz - Leads -
RS Stock No. 752-9233
Mfr. Part No.RKD 100/2x12
BrandBlock
$55.90
Each
units
115V ac, 230V ac 2 x 12V ac 100VA 2 - - 1.2kg 92mm - 50Hz 60Hz - Leads -
RS Stock No. 758-1042
Mfr. Part No.RKD 100/2x30
BrandBlock
$65.38
Each
units
2 x 115V ac 2 x 30V ac 100VA 2 - 45mm 1.2kg 94mm 94 (Dia.) x 45mm 50Hz 60Hz Screw Mount Leads 92mm
RS Stock No. 752-9369
Mfr. Part No.RKD 300/2x18
BrandBlock
$72.87
Each
units
115V ac, 230V ac 2 x 18V ac 300VA 2 - - 3kg 125mm - 50Hz 60Hz - Leads -
RS Stock No. 123-3103
Mfr. Part No.RKD 160/2x35
BrandBlock
$124.15
Each
units
2 x 115V ac 2 x 35V ac 160VA - - - - - 107 (Dia.) x 50mm 50Hz 60Hz Surface Mount Lead Wire -
RS Stock No. 123-3098
Mfr. Part No.RKD 60/2x30
BrandBlock
$62.13
Each
units
2 x 115V ac 2 x 30V ac 60VA - - - - - 83 (Dia) x 38mm 50Hz 60Hz Surface Mount Lead Wire -
RS Stock No. 752-9410
Mfr. Part No.RKD 500/2x24
BrandBlock
$178.98
Each
units
115V ac, 230V ac 2 x 24V ac 500VA 2 - - 4.8kg 140mm - 50Hz 60Hz - Leads -
RS Stock No. 752-9375
Mfr. Part No.RKD 330/2x18
BrandBlock
$146.19
Each
units
115V ac, 230V ac 2 x 18V ac 330VA 2 - - 3.3kg 124mm - 50Hz 60Hz - Leads -
RS Stock No. 752-9356
Mfr. Part No.RKD 30/2x12
BrandBlock
$57.57
Each
units
115 V ac, 230 V ac 2 x 12V ac 30VA 2 - - 470g 68mm - 50Hz 60Hz - Leads -
RS Stock No. 752-9249
Mfr. Part No.RKD 100/2x24
BrandBlock
$85.02
Each
units
115V ac, 230V ac 2 x 24V ac 100VA 2 - - 1.2kg 92mm - 50Hz 60Hz - Leads -
RS Stock No. 752-9397
Mfr. Part No.RKD 400/2x24
BrandBlock
$157.62
Each
units
115V ac, 230V ac 2 x 24V ac 400VA 2 - - 4.1kg 128mm - 50Hz 60Hz - Leads -
RS Stock No. 752-9378
Mfr. Part No.RKD 300/2x24
BrandBlock
$89.97
Each
units
115V ac, 230V ac 2 x 24V ac 300VA 2 - - 3kg 125mm - 50Hz 60Hz - Leads -
RS Stock No. 752-9416
Mfr. Part No.RKD 50/2x24
BrandBlock
$57.56
Each
units
115 V ac, 230 V ac 2 x 24V ac 50VA 2 - - 700g 77mm - 50Hz 60Hz - Leads -
RS Stock No. 123-3093
Mfr. Part No.RKD 30/2x9
BrandBlock
$61.45
Each
units
2 x 115V ac 2 x 9V ac 30VA - - - - - 71 (Dia.) x 31mm 50Hz 60Hz Surface Mount Lead Wire -
RS Stock No. 752-9384
Mfr. Part No.RKD 40/2x12
BrandBlock
$39.79
Each
units
115 V ac, 230 V ac 2 x 12V ac 40VA 2 - - 560g 75mm - 50Hz 60Hz - Leads -
RS Stock No. 752-9286
Mfr. Part No.RKD 160/2x18
BrandBlock
$101.31
Each
units
115V ac, 230V ac 2 x 18V ac 160VA 2 - - 1.7kg 105mm - 50Hz 60Hz - Leads -
RS Stock No. 752-9365
Mfr. Part No.RKD 300/2x12
BrandBlock
$123.81
Each
units
115V ac, 230V ac 2 x 12V ac 300VA 2 - - 3kg 125mm - 50Hz 60Hz - Leads -
RS Stock No. 752-9426
Mfr. Part No.RKD 60/2x12
BrandBlock
$71.10
Each
units
115 V ac, 230 V ac 2 x 12V ac 60VA 2 - - 750g 80mm - 50Hz 60Hz - Leads -
RS Stock No. 752-9347
Mfr. Part No.RKD 250/2x30
BrandBlock
$90.86
Each
units
115V ac, 230V ac 2 x 30V ac 250VA 2 - 54mm 2.5kg 114mm - 50Hz 60Hz - Leads -