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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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In Stock RS PRO 230 V ac 2 x 55 V ac Toroidal Transformer 2 Output 50 VA, UL 506, IEC 61558 Class II, VDE0570 Class II, RoHS, EN RS Stock No. 671-9101 Subtotal (1 unit) £24.88(exc. VAT) £24.88/unit Quantity	230 V ac	-	Toroidal Transformer	2 x 55 V ac	-	-	2	0.455A	33mm	50VA	740g	80mm	-	50Hz	60Hz	-	-	-	-	-	-	-	Copper Conductor	-	-	UL 506, IEC 61558 Class II, VDE0570 Class II, RoHS, EN 61558 Class II
In Stock RS PRO 230 V ac 2 x 25 V ac Toroidal Transformer 2 Output 120 VA RS Stock No. 671-9006 Subtotal (1 unit) £36.66(exc. VAT) £36.66/unit Quantity	230 V ac	-	Toroidal Transformer	2 x 25 V ac	-	-	2	2.4A	48mm	120VA	1.4kg	96mm	-	50Hz	60Hz	-	-	-	-	-	-	-	Copper Conductor	-	-	No
In Stock RS PRO 230 V ac 2 x 18 V ac Toroidal Transformer 2 Output 225 VA, VDE0570 Class II, UL506, IEC61558 Class II, EN61558 RS Stock No. 671-9038 Subtotal (1 unit) £43.78(exc. VAT) £43.78/unit Quantity	230 V ac	-	Toroidal Transformer	2 x 18 V ac	-	-	2	1.0408A	50mm	225VA	2.29kg	120mm	-	50Hz	60Hz	-	-	-	-	-	-	-	Solid Copper Conductor Terminal with PVC Insulation	-	-	VDE0570 Class II, UL506, IEC61558 Class II, EN61558 Class II
In Stock RS PRO 2 x 115 V ac 2 x 55 V ac Toroidal Transformer 2 Output 50 VA, UL506, IEC BS EN 61558-2-6, IEC BS EN 61558-1, RS Stock No. 540-4952 Subtotal (1 unit) £57.25(exc. VAT) £57.25/unit Quantity	2 x 115 V ac	-	Toroidal Transformer	2 x 55 V ac	-	-	2	600mA	34mm	50VA	760g	71mm	-	50Hz	60Hz	-	-	Dual Secondary, Dual Primary	105°C	-	-	-	-	-	-	UL506, IEC BS EN 61558-2-6, IEC BS EN 61558-1, RoHS, AS NZS 61558.2.4, BS EN 61558-1, AS NZS 61558.2.6, AS NZS 61558.1, IEC BS EN 61558-2-4, CE
In Stock RS PRO 230 V ac 2 x 6 V ac Toroidal Transformer 2 Output 30 VA, EN 61558 Class II, VDE0570 Class II, UL 506, RoHS, IEC RS Stock No. 671-8937 Subtotal (1 unit) £21.66(exc. VAT) £21.66/unit Quantity	230 V ac	-	Toroidal Transformer	2 x 6 V ac	-	-	2	2.5A	32mm	30VA	503g	70mm	-	50Hz	60Hz	-	-	-	-	-	-	-	Copper Conductor	-	-	EN 61558 Class II, VDE0570 Class II, UL 506, RoHS, IEC 61558 Class II
Last RS stock RS PRO 2 x 115 V ac 2 x 18 V Toroidal Transformer, REACH, RoHS RS Stock No. 124-3865 Subtotal (1 unit) £15.00(exc. VAT) £15.00/unit Quantity	2 x 115 V ac	-	Toroidal Transformer	2 x 18 V	-	-	-	278mA	26mm	-	252g	-	-	-	50Hz	-	-	Dual Primary, Multiple Secondary	60°C	Through Hole	-	-	-	-	-	REACH, RoHS
In Stock RS PRO 230 V ac 2 x 6 V ac Toroidal Transformer 2 Output 50 VA RS Stock No. 671-8959 Subtotal (1 unit) £39.91(exc. VAT) £39.91/unit Quantity	230 V ac	-	Toroidal Transformer	2 x 6 V ac	-	-	2	4.167A	33mm	50VA	740g	80mm	-	50Hz	60Hz	-	-	-	-	-	-	-	Copper Conductor Termination Wire	-	-	No
In Stock RS PRO 230 V ac 2 x 25 V ac Toroidal Transformer 2 Output 500 VA, UL506, EN60065 Class II, EN615581 Class II, UL51 RS Stock No. 123-4031 Subtotal (1 unit) £121.24(exc. VAT) £121.24/unit Quantity	230 V ac	-	Toroidal Transformer	2 x 25 V ac	-	-	2	10A	65mm	500VA	0.3kg	148mm	-	50Hz	60Hz	-	-	Single Primary, Dual Secondary	180°C	Surface	-	-	Wire	-	-	UL506, EN60065 Class II, EN615581 Class II, UL51
In Stock RS PRO 230 V ac 2 x 18 V ac Toroidal Transformer 2 Output 30 VA, UL 506, IEC 61558 Class II, VDE0570 Class II, RoHS, EN RS Stock No. 671-8946 Subtotal (1 unit) £28.69(exc. VAT) £28.69/unit Quantity	230 V ac	-	Toroidal Transformer	2 x 18 V ac	-	-	2	0.833A	32mm	30VA	503g	70mm	-	50Hz	60Hz	-	-	-	-	-	-	-	Copper Conductor	-	-	UL 506, IEC 61558 Class II, VDE0570 Class II, RoHS, EN 61558 Class II
In Stock RS PRO 230 V ac 2 x 55 V ac Toroidal Transformer 2 Output 225 VA, UL 506, RoHS, IEC 61558 Class II, EN 61558 Class II, RS Stock No. 671-9185 Subtotal (1 unit) £55.66(exc. VAT) £55.66/unit Quantity	230 V ac	-	Toroidal Transformer	2 x 55 V ac	-	-	2	2.045A	50mm	225VA	2.29kg	120mm	-	50Hz	60Hz	-	-	-	-	-	-	-	Copper Conductor	-	-	UL 506, RoHS, IEC 61558 Class II, EN 61558 Class II, VDE0570 Class II
In Stock RS PRO 230 V ac 2 x 15 V ac Toroidal Transformer 2 Output 30 VA RS Stock No. 671-8943 Subtotal (1 unit) £35.60(exc. VAT) £35.60/unit Quantity	230 V ac	-	Toroidal Transformer	2 x 15 V ac	-	-	2	1A	32mm	30VA	503g	70mm	-	50Hz	60Hz	-	-	-	-	-	-	-	Copper Conductor Termination Wire	-	-	No
Last RS stock RS PRO 2 x 115 V ac 2 x 12 V Toroidal Transformer 2 Output, REACH, RoHS RS Stock No. 124-3846 Subtotal (1 unit) £14.70(exc. VAT) £14.70/unit Quantity	2 x 115 V ac	-	Toroidal Transformer	2 x 12 V	-	-	2	1785mA	19.5mm	-	110g	-	-	-	50Hz	-	-	-	60°C	Through Hole	-	-	-	-	-	REACH, RoHS
In Stock RS PRO 230 V ac 2 x 18 V ac Toroidal Transformer 2 Output 120 VA RS Stock No. 671-9139 Subtotal (1 unit) £38.03(exc. VAT) £38.03/unit Quantity	230 V ac	-	Toroidal Transformer	2 x 18 V ac	-	-	2	3.333A	48mm	120VA	1.4kg	96mm	-	50Hz	60Hz	-	-	-	-	-	-	-	Copper Conductor	-	-	No
In Stock RS PRO 230 V ac 2 x 9 V ac Toroidal Transformer 2 Output 80 VA, EN 61558 Class II, RoHS, IEC 61558 Class II, UL 506, RS Stock No. 671-8974 Subtotal (1 unit) £45.68(exc. VAT) £45.68/unit Quantity	230 V ac	-	Toroidal Transformer	2 x 9 V ac	-	-	2	4.444A	38mm	80VA	1.04kg	93mm	-	50Hz	60Hz	-	-	-	-	-	-	-	Copper Conductor	-	-	EN 61558 Class II, RoHS, IEC 61558 Class II, UL 506, VDE0570 Class II
In Stock RS PRO 2 x 115 V ac 2 x 115 V ac Toroidal Transformer 2 Output 200 VA, RoHS, CE RS Stock No. 117-6060 Subtotal (1 unit) £86.13(exc. VAT) £86.13/unit Quantity	2 x 115 V ac	-	Toroidal Transformer	2 x 115 V ac	-	-	2	-	85mm	200VA	-	-	-	50Hz	60Hz	105°C	Open	Dual Primary	105°C	Surface	-	-	Termination Wire	-	-	RoHS, CE
Last RS stock RS PRO 2 x 115 V ac 2 x 12 V Toroidal Transformer 2 Output 7 VA, UL, RoHS RS Stock No. 124-3857 Subtotal (1 unit) £15.22(exc. VAT) £15.22/unit Quantity	2 x 115 V ac	-	Toroidal Transformer	2 x 12 V	-	-	2	292mA	23.1mm	7VA	174g	-	-	-	50Hz	-	Potted	Dual Secondary	60°C	Through Hole	-	-	-	-	-	UL, RoHS
In Stock RS PRO 2 x 115 V ac 2 x 24 V ac Toroidal Transformer 2 Output 250 VA, IEC 61558-2-6 RS Stock No. 117-6061 Subtotal (1 unit) £97.79(exc. VAT) £97.79/unit Quantity	2 x 115 V ac	-	Toroidal Transformer	2 x 24 V ac	-	-	2	-	52mm	250VA	2.4kg	115mm	-	50Hz	60Hz	-	Open	Dual Primary	105°C	Surface	-	-	Termination Wire	-	-	IEC 61558-2-6
In Stock RS PRO 230 V ac 2 x 12 V ac Toroidal Transformer 2 Output 30 VA, UL 506, EN 61558 Class II, VDE0570 Class II, RoHS, IEC RS Stock No. 671-8934 Subtotal (1 unit) £29.76(exc. VAT) £29.76/unit Quantity	230 V ac	-	Toroidal Transformer	2 x 12 V ac	-	-	2	1.25A	32mm	30VA	503g	70mm	-	50Hz	60Hz	-	-	-	-	-	-	-	Copper Conductor	-	-	UL 506, EN 61558 Class II, VDE0570 Class II, RoHS, IEC 61558 Class II
In Stock RS PRO 230 V ac 2 x 18 V ac Toroidal Transformer 2 Output 160 VA, UL 506, EN 61558 Class II, VDE0570 Class II, RoHS, IEC RS Stock No. 671-9016 Subtotal (1 unit) £59.77(exc. VAT) £59.77/unit Quantity	230 V ac	-	Toroidal Transformer	2 x 18 V ac	-	-	2	4.444A	46mm	160VA	1.74kg	109mm	-	50Hz	60Hz	-	-	-	-	-	-	-	Copper Conductor	-	-	UL 506, EN 61558 Class II, VDE0570 Class II, RoHS, IEC 61558 Class II
In Stock RS PRO 230 V ac 2 x 55 V ac Toroidal Transformer 2 Output, EN60065 Class II, EN61558-1 Class II RS Stock No. 123-4001 Subtotal (1 unit) £156.87(exc. VAT) £156.87/unit Quantity	230 V ac	-	Toroidal Transformer	2 x 55 V ac	-	-	2	12.50A	70mm	-	4.3kg	136mm	-	50Hz	60Hz	-	-	Single Primary, Dual Secondary	180°C	Surface	-	-	Wire	-	-	EN60065 Class II, EN61558-1 Class II