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Power Transformers - Board Mount

Board Mount Power Transformers are available at Mouser Electronics from industry leading manufacturers. Mouser is an authorized distributor for many board mount power transformer manufacturers including Bel, Bourns, Pulse, Tamura, Triad Magnetics, Wurth Elektronik & more. Please view our selection of power transformers below.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (JPY) Filter the results in the table by unit price based on your quantity.	Qty.	Product	Primary Voltage Rating	Secondary Voltage Rating	Power Rating	Secondary Current Rating	Mounting Style	Primary Winding	Secondary Winding	Length	Width	Height	Series
Power Transformers - Board Mount TRANSFORMER POWER PC-4 PC-40-20 Bel Signal Transformer 1: ¥3,366.8 69In Stock	Mfr. Part # PC-40-20 Mouser Part # 530-PC-40-20	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER POWER PC-4 Learn More about Bel Signal Transformer signal transformer pc mount transformers	Datasheet	69In Stock	¥3,366.8 ¥3,074.5 ¥2,870.2 ¥2,438.3 View ¥2,415.1 ¥2,393.5	Min.: 1 Mult.: 1		115 VAC	40 V CT/20 V	1 VA	20 mA/40 mA	Through Hole	Single Primary Winding	Dual Secondary Winding	25.4 mm	34.92 mm	21.08 mm	PC
Power Transformers - Board Mount TRANSFORMER POWER PC-3 PC-56-420 Bel Signal Transformer 1: ¥4,574.4 8In Stock	Mfr. Part # PC-56-420 Mouser Part # 530-PC-56-420	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER POWER PC-3 Learn More about Bel Signal Transformer signal transformer pc mount transformers	Datasheet	8In Stock	¥4,574.4 ¥4,365.1 ¥3,762.2 ¥3,410	Min.: 1 Mult.: 1		115 VAC	56 V CT/28 V	24 VA	420 mA/840 mA	Through Hole	Single Primary Winding	Dual Secondary Winding	41.3 mm	57.2 mm	34.93 mm	PC
Power Transformers - Board Mount HF POE SMT XFMR EP10 8PIN 7W ST-2-10 Bel Signal Transformer 1: ¥2,905.1 58In Stock	Mfr. Part # ST-2-10 Mouser Part # 530-ST-2-10	Bel Signal Transformer	Power Transformers - Board Mount HF POE SMT XFMR EP10 8PIN 7W Learn More about Bel Signal Transformer signal transformer st transformers	Datasheet	58In Stock	¥2,905.1 ¥2,657.6 ¥2,609.4 ¥2,302.1 ¥1,991.5	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC	10 V CT/5 V	1.1 VA	110 mA/220 mA	Through Hole	Single Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	24.6 mm	ST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-2 ST-2-12 Bel Signal Transformer 1: ¥2,234 42In Stock	Mfr. Part # ST-2-12 Mouser Part # 530-ST-2-12	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-2 Learn More about Bel Signal Transformer signal transformer st transformers	Datasheet	42In Stock	¥2,234 ¥2,165.9 ¥2,077.9 ¥2,013.1 View ¥1,880.3 ¥1,795.5 ¥1,745.7 ¥1,526.5 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC	12.6 V CT/6.3 V	1.1 VA	90 mA/180 mA	Through Hole	Single Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	24.6 mm	ST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-2 ST-2-24 Bel Signal Transformer 1: ¥3,109.4 18In Stock	Mfr. Part # ST-2-24 Mouser Part # 530-ST-2-24	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-2 Learn More about Bel Signal Transformer signal transformer st transformers	Datasheet	18In Stock	¥3,109.4 ¥3,074.5 ¥2,033.1 ¥2,009.8 View Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC	24 V CT/12 V	1.1 VA	45 mA/90 mA	Through Hole	Single Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	24.6 mm	ST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-2 ST-2-28 Bel Signal Transformer 1: ¥1,893.5 183In Stock	Mfr. Part # ST-2-28 Mouser Part # 530-ST-2-28	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-2 Learn More about Bel Signal Transformer signal transformer st transformers	Datasheet	183In Stock	¥1,893.5 ¥1,709.2 ¥1,639.4 ¥1,561.3 View ¥1,511.5 ¥1,307.2 ¥1,272.3 ¥1,242.4 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC	28 V CT/14 V	1.1 VA	40 mA/80 mA	Through Hole	Single Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	24.6 mm	ST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-2 ST-2-48 Bel Signal Transformer 1: ¥2,856.9 28In Stock	Mfr. Part # ST-2-48 Mouser Part # 530-ST-2-48	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-2 Learn More about Bel Signal Transformer signal transformer st transformers	Datasheet	28In Stock	¥2,856.9 ¥2,612.8 ¥2,566.2 ¥2,267.3 ¥1,956.7	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC	48 V CT/24 V	1.1 VA	23 mA/46 mA	Through Hole	Single Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	24.6 mm	ST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-2 ST-3-10 Bel Signal Transformer 1: ¥2,131.1 92In Stock	Mfr. Part # ST-3-10 Mouser Part # 530-ST-3-10	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-2 Learn More about Bel Signal Transformer signal transformer st transformers	Datasheet	92In Stock	¥2,131.1 ¥1,901.8 ¥1,825.4 ¥1,767.3 View ¥1,710.8 ¥1,632.8 ¥1,415.2 ¥1,385.3 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC	10 V CT/5 V	2.4 VA	250 mA/500 mA	Through Hole	Single Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	30.8 mm	ST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-3 ST-3-16 Bel Signal Transformer 1: ¥1,710.8 173In Stock	Mfr. Part # ST-3-16 Mouser Part # 530-ST-3-16	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-3 Learn More about Bel Signal Transformer signal transformer st transformers	Datasheet	173In Stock	¥1,710.8 ¥1,568 ¥1,475 ¥1,421.8 View ¥1,377 ¥1,333.8 ¥1,222.5 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC	16 V CT/8 V	2.4 VA	150 mA/300 mA	Through Hole	Single Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	30.8 mm	ST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-3 ST-3-28 Bel Signal Transformer 1: ¥1,822.1 66In Stock	Mfr. Part # ST-3-28 Mouser Part # 530-ST-3-28	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-3 Learn More about Bel Signal Transformer signal transformer st transformers	Datasheet	66In Stock	¥1,822.1 ¥1,566.3 ¥1,415.2 ¥1,385.3 View ¥1,333.8 ¥1,279 ¥1,272.3 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC	28 V CT/14 V	2.4 VA	85 mA/170 mA	Through Hole	Single Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	30.8 mm	ST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-3 ST-3-36 Bel Signal Transformer 1: ¥1,920.1 28In Stock 200Expected 11/20/2026	Mfr. Part # ST-3-36 Mouser Part # 530-ST-3-36	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-3 Learn More about Bel Signal Transformer signal transformer st transformers	Datasheet	28In Stock 200Expected 11/20/2026	¥1,920.1 ¥1,705.8 ¥1,636.1 ¥1,584.6 View ¥1,533.1 ¥1,348.7 ¥1,310.5 ¥1,279	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC	36 V CT/18 V	2.4 VA	65 mA/130 mA	Through Hole	Single Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	30.8 mm	ST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-3 ST-3-56 Bel Signal Transformer 1: ¥1,945 13In Stock	Mfr. Part # ST-3-56 Mouser Part # 530-ST-3-56	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-3 Learn More about Bel Signal Transformer signal transformer st transformers	Datasheet	13In Stock	¥1,945 ¥1,807.2 ¥1,772.3 ¥1,599.5 ¥1,357	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC	56 V CT/28 V	2.4 VA	45 mA/90 mA	Through Hole	Single Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	30.8 mm	ST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-4 ST-4-16 Bel Signal Transformer 1: ¥2,249 44In Stock 200Expected 10/30/2026	Mfr. Part # ST-4-16 Mouser Part # 530-ST-4-16	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-4 Learn More about Bel Signal Transformer signal transformer st transformers	Datasheet	44In Stock 200Expected 10/30/2026	¥2,249 ¥2,026.4 ¥1,943.4 ¥1,651 View ¥1,602.9 ¥1,514.8 ¥1,433.4 ¥1,395.2 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC	16 V CT/8 V	6 VA	400 mA/800 mA	Through Hole	Single Primary Winding	Dual Secondary Winding	41.3 mm	33.3 mm	33.3 mm	ST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-4 ST-4-20 Bel Signal Transformer 1: ¥2,077.9 148In Stock	Mfr. Part # ST-4-20 Mouser Part # 530-ST-4-20	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-4 Learn More about Bel Signal Transformer signal transformer st transformers	Datasheet	148In Stock	¥2,077.9 ¥1,905.2 ¥1,823.8 ¥1,822.1 View ¥1,582.9 ¥1,519.8 ¥1,481.6 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC	20 V CT/10 V	6 VA	300 mA/600 mA	Through Hole	Single Primary Winding	Dual Secondary Winding	41.3 mm	33.3 mm	33.3 mm	ST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-4 ST-4-24 Bel Signal Transformer 1: ¥1,906.8 120In Stock 500Expected 11/20/2026	Mfr. Part # ST-4-24 Mouser Part # 530-ST-4-24	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-4 Learn More about Bel Signal Transformer signal transformer st transformers	Datasheet	120In Stock 500Expected 11/20/2026	¥1,906.8 ¥1,749 ¥1,644.4 ¥1,582.9 View ¥1,534.8 ¥1,491.6 ¥1,484.9 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC	24 V CT/12 V	6 VA	250 mA/500 mA	Through Hole	Single Primary Winding	Dual Secondary Winding	41.3 mm	33.3 mm	33.3 mm	ST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-4 ST-4-28 Bel Signal Transformer 1: ¥2,370.2 77In Stock	Mfr. Part # ST-4-28 Mouser Part # 530-ST-4-28	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-4 Learn More about Bel Signal Transformer signal transformer st transformers	Datasheet	77In Stock	¥2,370.2 ¥2,172.6 ¥2,043 ¥1,968.3 View ¥1,925.1 ¥1,891.9 ¥1,651 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC	28 V CT/14 V	6 VA	200 mA/400 mA	Through Hole	Single Primary Winding	Dual Secondary Winding	41.3 mm	33.3 mm	33.3 mm	ST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-4 ST-4-36 Bel Signal Transformer 1: ¥2,325.4 60In Stock 100Expected 12/9/2026	Mfr. Part # ST-4-36 Mouser Part # 530-ST-4-36	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-4 Learn More about Bel Signal Transformer signal transformer st transformers	Datasheet	60In Stock 100Expected 12/9/2026	¥2,325.4 ¥2,131.1 ¥2,003.2 ¥1,930.1 View ¥1,827.1 ¥1,710.8 ¥1,647.7 ¥1,619.5	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC	36 V CT/18 V	6 VA	170 mA/340 mA	Through Hole	Single Primary Winding	Dual Secondary Winding	41.3 mm	33.3 mm	33.3 mm	ST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-5 ST-5-16 Bel Signal Transformer 1: ¥2,632.7 122In Stock	Mfr. Part # ST-5-16 Mouser Part # 530-ST-5-16	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-5 Learn More about Bel Signal Transformer signal transformer st transformers	Datasheet	122In Stock	¥2,632.7 ¥2,305.5 ¥1,921.8 ¥1,867 View ¥1,817.1 ¥1,707.5 ¥1,647.7 ¥1,622.8 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC	16 V CT/8 V	12 VA	800 mA/1.6 A	Through Hole	Single Primary Winding	Dual Secondary Winding	48.4 mm	40.4 mm	36.9 mm	ST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-5 ST-5-20 Bel Signal Transformer 1: ¥2,602.8 43In Stock	Mfr. Part # ST-5-20 Mouser Part # 530-ST-5-20	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-5 Learn More about Bel Signal Transformer signal transformer st transformers	Datasheet	43In Stock	¥2,602.8 ¥2,380.2 ¥2,234 ¥2,152.7 View ¥2,076.3 ¥1,923.4 ¥1,868.6 ¥1,852	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC	20 V CT/10 V	12 VA	600 mA/1.2 A	Through Hole	Single Primary Winding	Dual Secondary Winding	48.4 mm	40.4 mm	36.9 mm	ST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-5 ST-5-28 Bel Signal Transformer 1: ¥2,715.7 19In Stock	Mfr. Part # ST-5-28 Mouser Part # 530-ST-5-28	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-5 Learn More about Bel Signal Transformer signal transformer st transformers	Datasheet	19In Stock	¥2,715.7 ¥2,431.7 ¥2,345.3 ¥2,036.4 View ¥1,979.9 ¥1,845.4 ¥1,820.5	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC	28 V CT/14 V	12 VA	420 mA/840 mA	Through Hole	Single Primary Winding	Dual Secondary Winding	48.4 mm	40.4 mm	36.9 mm	ST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-5 ST-5-48 Bel Signal Transformer 1: ¥4,062.8 26In Stock	Mfr. Part # ST-5-48 Mouser Part # 530-ST-5-48	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-5 Learn More about Bel Signal Transformer signal transformer st transformers	Datasheet	26In Stock	¥4,062.8 ¥3,767.1 ¥3,200.7 ¥3,067.9 View ¥3,046.3 ¥2,979.8 ¥2,941.6 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC	48 V CT/24 V	12 VA	250 mA/500 mA	Through Hole	Single Primary Winding	Dual Secondary Winding	48.4 mm	40.4 mm	36.9 mm	ST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-6 ST-6-24 Bel Signal Transformer 1: ¥4,061.1 5In Stock	Mfr. Part # ST-6-24 Mouser Part # 530-ST-6-24	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-6 Learn More about Bel Signal Transformer signal transformer st transformers	Datasheet	5In Stock	¥4,061.1 ¥3,479.8 ¥3,335.3 ¥2,925 View ¥2,856.9 ¥2,740.7 ¥2,664.2 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC	24 V CT/12 V	20 VA	800 mA/1.6 A	Through Hole	Single Primary Winding	Dual Secondary Winding	57.2 mm	47.8 mm	36.9 mm	ST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-6 ST-6-28 Bel Signal Transformer 1: ¥4,223.9 14In Stock	Mfr. Part # ST-6-28 Mouser Part # 530-ST-6-28	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-6 Learn More about Bel Signal Transformer signal transformer st transformers	Datasheet	14In Stock	¥4,223.9 ¥3,959.8 ¥2,747.3 ¥2,705.8 View ¥2,674.2 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC	28 V CT/14 V	20 VA	700 mA/1.4 A	Through Hole	Single Primary Winding	Dual Secondary Winding	57.2 mm	47.8 mm	36.9 mm	ST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-7 ST-7-12 Bel Signal Transformer 1: ¥5,177.3 17In Stock	Mfr. Part # ST-7-12 Mouser Part # 530-ST-7-12	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-7 Learn More about Bel Signal Transformer signal transformer st transformers	Datasheet	17In Stock	¥5,177.3 ¥4,969.7 ¥3,680.8 ¥3,225.7 View ¥3,189.1 ¥3,152.6 ¥3,114.4 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC	12.6 V CT/6.3 V	36 VA	2.85 A/5.7 A	Through Hole	Single Primary Winding	Dual Secondary Winding	66.7 mm	55.5 mm	40.4 mm	ST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-7 ST-7-20 Bel Signal Transformer 1: ¥3,496.4 40In Stock	Mfr. Part # ST-7-20 Mouser Part # 530-ST-7-20	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-7 Learn More about Bel Signal Transformer signal transformer st transformers	Datasheet	40In Stock	¥3,496.4 ¥3,395.1 ¥3,393.4 ¥3,145.9 View ¥3,122.7 ¥3,071.2 ¥3,029.7 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC	20 V CT/10 V	36 VA	1.8 A/3.6 A	Through Hole	Single Primary Winding	Dual Secondary Winding	66.7 mm	55.5 mm	40.4 mm	ST