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SMPS Transformers

Switch mode power supply (SMPS) transformers are a highly efficient form of transformer, used in devices like personal computers.

A switch mode power supply is an electronic power supply that incorporates a switching regulator to efficiently convert electrical power. Like other power supplies, an SMPS transfers power from a DC or AC source (which is often mains power) to DC loads, such as a personal computer, while converting voltage and current characteristics.

How do switch mode power supply (SMPS) transformers work?

Any switched-mode power supply that gets its power from an AC power line (also known as an 'off-line' converter) requires a transformer for galvanic isolation, which prevents current flow. Some DC-to-DC converters may also include a transformer.

SMPS transformers run at high frequency. Most of the cost savings (as well as space savings) in off-line power supplies result from the smaller size of the high-frequency transformer.

Types of switch mode power supply (SMPS) transformers

SMPS transformers have many different applications. They can be used as broadband transformers, DC-to-DC converters, low-power DC-to-DC converters, pulse transformers and power sourcing equipment, among other uses.

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In Stock RS PRO 1 Output SMPS Transformer 12 W Output, 100 to 240 V RS Stock No. 774-8213 Subtotal (1 unit) Kr. 416,90(exc. VAT) Kr. 416,90/unit Quantity		SMPS Transformer	-	-	100 to 240 V	-	-	1	Encapsulated	-	-	-	12W	2.5A	-	50mm	-20°C	-	0.35A	48mm	40mm	50°C	-	-	No	0.1kg	-
In Stock Wurth Elektronik 1 Output Switch Mode Power Supply Transformer 1.25 W Output, 12 V dc, 5 V dc, 1.92 mH RS Stock No. 245-8596 Mfr. Part No. 750317830 Subtotal (1 unit) Kr. 33,18(exc. VAT) Kr. 33,18/unit Quantity	Wurth Elektronik	Switch Mode Power Supply Transformer	5 V dc	-	12 V dc	-	-	1	Surface	-	-	1.92mH	1.25W	0.8A	-	10.2mm	-40°C	6	-	6.73mm	4.19mm	125°C	-	-	RoHS	-	-
In Stock Wurth Elektronik 1 Output Switch Mode Power Supply Transformer 1.2 W Output, 12 V dc, 12 V dc, 1.92 mH RS Stock No. 245-8594 Mfr. Part No. 750317829 Subtotal (1 unit) Kr. 28,26(exc. VAT) Kr. 28,26/unit Quantity	Wurth Elektronik	Switch Mode Power Supply Transformer	12 V dc	-	12 V dc	-	-	1	Surface	-	-	1.92mH	1.2W	0.8A	-	10.2mm	-40°C	6	-	6.73mm	4.19mm	125°C	-	-	RoHS	-	-
Limited stock Myrra 2 Output SMPS Transformer 5.4 W Output, 265 V ac, 370 V dc, 24 V dc RS Stock No. 792-4348 Mfr. Part No. 47122 Subtotal (1 unit) Kr. 251,79(exc. VAT) Kr. 251,79/unit Quantity	Myrra	SMPS Transformer	24 V dc	-	265 V ac, 370 V dc	-	-	2	-	-	-	-	5.4W	1350mA	-	-	-40°C	-	-	-	-	85°C	-	47000	UL 94-V0, EN 55014-1, EN 60335, EN 55014-2, EN 61558-2-17, EN 55022 Class B, EN 60950, EN 61000-4-x	-	4000V ac
Limited stock Myrra 3 Output SMPS Transformer 30 W Output, 85 to 265 V ac, 8 to 17 V ac, 3.3 to 7 V ac RS Stock No. 418-5543 Mfr. Part No. 74030 Subtotal (1 unit) Kr. 109,14(exc. VAT) Kr. 109,14/unit Quantity	Myrra	SMPS Transformer	8 to 17 V ac, 3.3 to 7 V ac	-	85 to 265 V ac	-	-	3	Through Hole	-	-	-	30W	-	Pin	26.5mm	-	-	1.5A	22.5mm	26.5mm	50°C	-	-	UL94-V0, IEC335, IEC950, IEC61558	-	4000V
In Stock Bourns 2 Output Switch Mode Power Supply Transformer 1 W Output, 3.3 V, 475 μH RS Stock No. 234-1660P Mfr. Part No. PAD001-T764117S Subtotal 5 units (supplied on a continuous strip) Kr. 133,16(exc. VAT) Kr. 26,632/unit Quantity	Bourns	Switch Mode Power Supply Transformer	3.3 V	-	-	-	-	2	PCB	-	-	475μH	1W	-	Surface Mount	7.1mm	-40°C	6	300mA	6.55mm	4mm	125°C	-	PAD00x-T764	RoHS	350mg	3100Vrms
Limited stock Myrra 3 Output SMPS Transformer 5.4 W Output, 370 V dc, 265 V ac, 24 V dc RS Stock No. 792-4360 Mfr. Part No. 47152 Subtotal (1 unit) Kr. 273,99(exc. VAT) Kr. 273,99/unit Quantity	Myrra	SMPS Transformer	24 V dc	-	370 V dc, 265 V ac	-	-	3	-	-	-	-	5.4W	1350, 70mA	-	-	-25°C	-	-	-	-	70°C	-	47000	EN 55022 Class B, EN 55014-1, UL 94-V0, EN 61558-2-17, EN 55014-2, EN 61000-4-x, EN 60950, EN 60335	-	4000V ac
In Stock Myrra 2 Output SMPS Transformer 5.4 W Output, 370 V dc, 265 V ac, 24 V dc RS Stock No. 792-4376 Mfr. Part No. 47155 Subtotal (1 unit) Kr. 167,37(exc. VAT) Kr. 167,37/unit Quantity	Myrra	SMPS Transformer	24 V dc	-	370 V dc, 265 V ac	-	-	2	-	-	-	-	5.4W	1350mA	-	-	-25°C	-	-	-	-	70°C	-	47000	EN 61000-4-x, UL 94-V0, UL, EN 60950, EN 55014-2, EN 55014-1, EN 61558-2-17, EN 60335, EN 55022 Class B	-	4000V ac
Limited stock Myrra 5 Output SMPS Transformer 5 W Output, 265 V, 85 to 370 V ac, 3.3 V RS Stock No. 792-4366 Mfr. Part No. 47151 Subtotal (1 unit) Kr. 267,24(exc. VAT) Kr. 267,24/unit Quantity	Myrra	SMPS Transformer	3.3 V	-	265 V, 85 to 370 V ac	-	-	5	Through Hole	-	-	-	5W	1350mA	-	31.7mm	-25°C	4	0.2A	26.7mm	21.8mm	50°C	-	-	RoHS, CE, VDE, ENEC, UL	30g	-
Limited stock Myrra 2 Output SMPS Transformer 10 W Output, 85/265 V ac, 7 V, 8 to 17 V ac, 1.66 mH RS Stock No. 418-5515 Mfr. Part No. 74010 Subtotal (1 unit) Kr. 105,13(exc. VAT) Kr. 105,13/unit Quantity	Myrra	SMPS Transformer	7 V, 8 to 17 V ac	-	85/265 V ac	-	-	2	Through Hole	-	-	1.66mH	10W	2A	Pin	18mm	-	-	-	17.5mm	16mm	50°C	-	-	RoHS	-	-
In Stock Myrra 2 Output SMPS Transformer 120 W Output, 265 V ac, 15.5 V dc, 440 μH RS Stock No. 418-4073 Mfr. Part No. 74060 Subtotal (1 unit) Kr. 306,59(exc. VAT) Kr. 306,59/unit Quantity	Myrra	SMPS Transformer	15.5 V dc	-	265 V ac	-	-	2	-	-	-	440μH	120W	4A	-	-	-	-	-	-	-	50°C	-	ETD 39	CEI61558, CEI335, CEI950	-	3750V ac
Limited stock Myrra SMPS Transformer RS Stock No. 418-5537 Mfr. Part No. 74020 Subtotal (1 unit) Kr. 101,70(exc. VAT) Kr. 101,70/unit Quantity	Myrra	SMPS Transformer	-	-	-	-	-	-	-	-	-	-	-	3A	-	-	-	-	-	-	-	50°C	-	EL 19	CEI335, CEI61558, CEI950	-	3750V ac
Limited stock Myrra 1 Output SMPS Transformer 5 W Output, 370 V dc, 265 V ac, 12 V dc RS Stock No. 792-4372 Mfr. Part No. 47154 Subtotal (1 unit) Kr. 221,82(exc. VAT) Kr. 221,82/unit Quantity	Myrra	SMPS Transformer	12 V dc	-	370 V dc, 265 V ac	-	-	1	Through Hole	-	-	-	5W	1350mA	-	31.7mm	-25°C	-	-	26.7mm	21.8mm	70°C	-	47000	EN 55022 Class B, EN 60335, EN 61558-2-17, EN 55014-2, EN 61000-4-x, UL 94-V0, EN 60950, EN 55014-1	-	4000V ac
Temporarily out of stock Wurth Elektronik 1 Output SMPS Transformer 150 W Output, 360/400 V, 12 V, 600 μH RS Stock No. 823-5425 Mfr. Part No. 760895431 Subtotal (1 unit) Kr. 140,76(exc. VAT) Kr. 140,76/unit Quantity	Wurth Elektronik	SMPS Transformer	12 V	-	360/400 V	-	-	1	Through Hole	-	-	600μH	150W	2A	-	36mm	-40°C	12	-	36mm	26mm	125°C	-	WE-LLCR	No	57g	250V
Temporarily out of stock Wurth Elektronik 1 Output Switch Mode Power Supply Transformer 1.25 W Output, 24 V dc, 5 V dc, 4 mH RS Stock No. 245-8591 Mfr. Part No. 750317828 Subtotal (1 reel of 1200 units) Kr. 19 338,00(exc. VAT) Kr. 16,115/unit Quantity	Wurth Elektronik	Switch Mode Power Supply Transformer	5 V dc	-	24 V dc	-	-	1	Surface	-	-	4mH	1.25W	0.8A	-	10.2mm	-40°C	6	-	6.73mm	4.19mm	125°C	-	-	RoHS	-	-
Temporarily out of stock Myrra 3 Output SMPS Transformer 5.4 W Output, 85 to 265 V ac, 85 to 370 V dc, 24 V RS Stock No. 792-4414 Mfr. Part No. 47243 Subtotal (1 unit) Kr. 296,41(exc. VAT) Kr. 296,41/unit Quantity	Myrra	SMPS Transformer	24 V	-	85 to 265 V ac, 85 to 370 V dc	-	-	3	-	-	-	-	5.4W	110, 1350mA	-	-	-40°C	-	-	-	-	85°C	-	47000	UL 94-V0, EN 60335, EN 61000-4-x, EN 55014-1, EN 61558-2-17, EN 55014-2, EN 60950, EN 55022 Class B	-	4000V ac
Temporarily out of stock Wurth Elektronik 1 Output Switch Mode Power Supply Transformer 1.2 W Output, 12 V dc, 12 V dc, 1.92 mH RS Stock No. 245-8593 Mfr. Part No. 750317829 Subtotal (1 reel of 1200 units) Kr. 28 087,20(exc. VAT) Kr. 23,406/unit Quantity	Wurth Elektronik	Switch Mode Power Supply Transformer	12 V dc	-	12 V dc	-	-	1	Surface	-	-	1.92mH	1.2W	0.8A	-	10.2mm	-40°C	6	-	6.73mm	4.19mm	125°C	-	-	RoHS	-	-
In Stock Myrra 10 Output SMPS Transformer 110 W Output, 265 V ac, 2 to 18 V dc, 3900 μH RS Stock No. 418-5470 Mfr. Part No. 74000 Subtotal (1 unit) Kr. 79,85(exc. VAT) Kr. 79,85/unit Quantity	Myrra	SMPS Transformer	2 to 18 V dc	-	265 V ac	-	-	10	-	-	-	3900μH	110W	0.21, 2A	-	-	-	-	-	-	-	50°C	-	EE16	CEI61558, CEI950, CEI335	-	3750V ac
Limited stock Myrra 5 Output SMPS Transformer 2.5 W Output, 85 to 370 V ac, 265 V, 12 V RS Stock No. 792-4350 Mfr. Part No. 47124 Subtotal (1 unit) Kr. 206,03(exc. VAT) Kr. 206,03/unit Quantity	Myrra	SMPS Transformer	12 V	-	85 to 370 V ac, 265 V	-	-	5	Through Hole	-	-	-	2.5W	210mA	-	31.7mm	-25°C	4	0.2A	26.7mm	21.8mm	70°C	-	-	RoHS, UL, CE, VDE, ENEC	30g	-
In Stock Bourns 2 Output SMPS Transformer 6 W Output, 265 V ac, 12 V ac, 1.55 mH RS Stock No. 285-0561 Mfr. Part No. 063932 Subtotal (1 unit) Kr. 24,02(exc. VAT) Kr. 24,02/unit Quantity	Bourns	SMPS Transformer	12 V ac	-	265 V ac	-	-	2	Surface	-	-	1.55mH	6W	-	-	-	-25°C	-	-	-	-	125°C	-	063932	RoHS, EN 60335, EN 61558, EN 62368	-	-