Power Transformers - Board Mount

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DST Class 2 Transformers

Signal Transformer / Bel DST Class 2 Transformers provide superior isolation and low capacitive coupling. The Split Bobbin-Low Power transformers feature a power rating of 1.1VA to 36VA and are available in 60 standard configurations. Signal Transformer / Bel DST Transformers are recognized to UL 506 and meet the specifications for UL 1446 (E66312).

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (IDR) 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 SPLIT-TRAN DST-5 DST-5-24 Bel Signal Transformer 1: Rp281.978 251In Stock	Mfr. Part No. DST-5-24 Mouser Part No 530-DST-5-24	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-5 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	251In Stock	Rp281.978 Rp257.578 Rp242.351 Rp235.746 View Rp227.674 Rp219.969 Rp209.511 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	24 V CT/12 V	12 VA	500 mA/1 A	Through Hole	Dual Primary Winding	Dual Secondary Winding	48.4 mm	40.4 mm	36.9 mm	DST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-4 DST-4-12 Bel Signal Transformer 1: Rp248.038 363In Stock	Mfr. Part No. DST-4-12 Mouser Part No 530-DST-4-12	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-4 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	363In Stock	Rp248.038 Rp227.307 Rp214.098 Rp206.576 View Rp200.338 Rp191.349 Rp188.780 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	12.6 V CT/6.3 V	6 VA	500 mA/1 A	Through Hole	Dual Primary Winding	Dual Secondary Winding	41.3 mm	33.3 mm	33.3 mm	DST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-4 DST-4-16 Bel Signal Transformer 1: Rp251.707 309In Stock	Mfr. Part No. DST-4-16 Mouser Part No 530-DST-4-16	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-4 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	309In Stock	Rp251.707 Rp229.508 Rp217.033 Rp208.961 View Rp202.540 Rp194.468 Rp191.532 Rp184.561	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	16 V CT/8 V	6 VA	400 mA/800 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	41.3 mm	33.3 mm	33.3 mm	DST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-4 DST-4-24 Bel Signal Transformer 1: Rp298.489 174In Stock	Mfr. Part No. DST-4-24 Mouser Part No 530-DST-4-24	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-4 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	174In Stock	Rp298.489 Rp275.007 Rp273.722 Rp232.444 View Rp232.260 Rp218.684 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	24 V CT/12 V	6 VA	250 mA/500 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	41.3 mm	33.3 mm	33.3 mm	DST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-5 DST-5-16 Bel Signal Transformer 1: Rp276.474 372In Stock	Mfr. Part No. DST-5-16 Mouser Part No 530-DST-5-16	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-5 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	372In Stock	Rp276.474 Rp253.358 Rp238.498 Rp230.059 View Rp221.987 Rp212.814 Rp211.896 Rp204.558 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	16 V CT/8 V	12 VA	800 mA/1.6 A	Through Hole	Dual Primary Winding	Dual Secondary Winding	48.4 mm	40.4 mm	36.9 mm	DST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-7 DST-7-28 Bel Signal Transformer 1: Rp515.339 96In Stock	Mfr. Part No. DST-7-28 Mouser Part No 530-DST-7-28	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-7 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	96In Stock	Rp515.339 Rp458.833 Rp422.875 Rp412.785 View Rp402.328 Rp391.320 Rp387.834 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	28 V CT/14 V	36 VA	1.3 A/2.6 A	Through Hole	Dual Primary Winding	Dual Secondary Winding	66.7 mm	55.5 mm	40.4 mm	DST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-2 DST-2-56 Bel Signal Transformer 1: Rp250.239 34In Stock	Mfr. Part No. DST-2-56 Mouser Part No 530-DST-2-56	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-2 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	34In Stock	Rp250.239 Rp212.814 Rp204.191 Rp197.403 Rp167.682	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	56 V CT/28 V	1.1 VA	20 mA/40 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	24.6 mm	DST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-3 DST-3-12 Bel Signal Transformer 1: Rp264.733 15In Stock	Mfr. Part No. DST-3-12 Mouser Part No 530-DST-3-12	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-3 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	15In Stock	Rp264.733 Rp236.480 Rp226.940 Rp196.119 View Rp193.000 Rp191.899 Rp188.597 Rp186.762 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	12.6 V CT/6.3 V	2.4 VA	20 mA/40 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	30.8 mm	DST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-3 DST-3-48 Bel Signal Transformer 1: Rp300.141 113In Stock	Mfr. Part No. DST-3-48 Mouser Part No 530-DST-3-48	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-3 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	113In Stock	Rp300.141 Rp252.441 Rp241.984 Rp239.232 Rp206.943	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	48 V CT/24 V	2.4 VA	50 mA/100 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	30.8 mm	DST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-6 DST-6-12 Bel Signal Transformer 1: Rp415.904 47In Stock	Mfr. Part No. DST-6-12 Mouser Part No 530-DST-6-12	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-6 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	47In Stock	Rp415.904 Rp374.809 Rp341.236 Rp332.430 View Rp325.458 Rp316.652 Rp310.598 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	12.6 V CT/6.3 V	20 VA	1.6 A/3.2 A	Through Hole	Dual Primary Winding	Dual Secondary Winding	57.2 mm	47.8 mm	36.9 mm	DST
Power Transformers - Board Mount Radial Inductor with Leads,8200 H, 0.13A,Q>20 DST-2-10 Bel Signal Transformer 1: Rp247.488 107In Stock	Mfr. Part No. DST-2-10 Mouser Part No 530-DST-2-10	Bel Signal Transformer	Power Transformers - Board Mount Radial Inductor with Leads,8200 H, 0.13A,Q>20 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	107In Stock	Rp247.488 Rp219.969 Rp210.979 Rp191.349 View Rp179.240 Rp176.489 Rp173.920 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	10 V CT/5 V	1.1 VA	110 mA/220 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	24.6 mm	DST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-3 DST-4-10 Bel Signal Transformer 1: Rp269.870 99In Stock	Mfr. Part No. DST-4-10 Mouser Part No 530-DST-4-10	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-3 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	99In Stock	Rp269.870 Rp241.984 Rp232.077 Rp214.281 View Rp198.137 Rp194.101 Rp192.266 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	10 V CT/5 V	6 VA	600 mA/1.2 A	Through Hole	Dual Primary Winding	Dual Secondary Winding	41.3 mm	33.3 mm	33.3 mm	DST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-7 DST-7-12 Bel Signal Transformer 1: Rp515.339 37In Stock	Mfr. Part No. DST-7-12 Mouser Part No 530-DST-7-12	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-7 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	37In Stock	Rp515.339 Rp464.337 Rp412.235 Rp399.943 View Rp395.907 Rp392.421 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	12.6 V CT/6.3 V	36 VA	2.85 A/5.7 A	Through Hole	Dual Primary Winding	Dual Secondary Winding	66.7 mm	55.5 mm	40.4 mm	DST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-5 DST-5-20 Bel Signal Transformer 1: Rp296.655 143In Stock	Mfr. Part No. DST-5-20 Mouser Part No 530-DST-5-20	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-5 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	143In Stock	Rp296.655 Rp260.513 Rp239.966 Rp231.343 View Rp223.087 Rp206.393 Rp204.008 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	20 V CT/10 V	12 VA	600 mA/1.2 A	Through Hole	Dual Primary Winding	Dual Secondary Winding	48.4 mm	40.4 mm	36.9 mm	DST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-6 DST-6-36 Bel Signal Transformer 1: Rp397.191 164In Stock	Mfr. Part No. DST-6-36 Mouser Part No 530-DST-6-36	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-6 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	164In Stock	Rp397.191 Rp364.902 Rp353.161 Rp342.336 View Rp329.127 Rp314.817 Rp306.929 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	36 V CT/18 V	20 VA	550 mA/1.1 A	Through Hole	Dual Primary Winding	Dual Secondary Winding	57.2 mm	47.8 mm	36.9 mm	DST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-2 DST-2-12 Bel Signal Transformer 1: Rp247.488 72In Stock	Mfr. Part No. DST-2-12 Mouser Part No 530-DST-2-12	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-2 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	72In Stock	Rp247.488 Rp223.271 Rp214.098 Rp191.349 View Rp185.845 Rp180.341 Rp177.039 Rp173.553 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	12.6 V CT/6.3 V	1.1 VA	90 mA/180 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	24.6 mm	DST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-2 DST-2-120 Bel Signal Transformer 1: Rp247.488 97In Stock	Mfr. Part No. DST-2-120 Mouser Part No 530-DST-2-120	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-2 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	97In Stock	Rp247.488 Rp223.271 Rp214.098 Rp191.349 View Rp185.845 Rp180.341 Rp177.039 Rp173.553 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	120 V CT/60 V	1.1 VA	10 mA/20 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	24.6 mm	DST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-2 DST-2-16 Bel Signal Transformer 1: Rp260.513 28In Stock 100Expected 13/10/2026	Mfr. Part No. DST-2-16 Mouser Part No 530-DST-2-16	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-2 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	28In Stock 100Expected 13/10/2026	Rp260.513 Rp232.994 Rp226.940 Rp212.263 View Rp205.292 Rp195.935 Rp180.525 Rp176.855 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	16 V CT/8 V	1.1 VA	70 mA/140 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	24.6 mm	DST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-2 DST-2-24 Bel Signal Transformer 1: Rp239.048 50In Stock 200Expected 23/10/2026	Mfr. Part No. DST-2-24 Mouser Part No 530-DST-2-24	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-2 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	50In Stock 200Expected 23/10/2026	Rp239.048 Rp219.235 Rp206.026 Rp198.687 View Rp192.450 Rp183.093 Rp178.140 Rp175.388	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	24 V CT/12 V	1.1 VA	45 mA/90 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	24.6 mm	DST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-2 DST-2-28 Bel Signal Transformer 1: Rp266.017 35In Stock	Mfr. Part No. DST-2-28 Mouser Part No 530-DST-2-28	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-2 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	35In Stock	Rp266.017 Rp246.937 Rp242.351 Rp218.501 Rp186.762	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	28 V CT/14 V	1.1 VA	40 mA/80 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	24.6 mm	DST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-2 DST-3-10 Bel Signal Transformer 1: Rp238.131 50In Stock	Mfr. Part No. DST-3-10 Mouser Part No 530-DST-3-10	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-2 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	50In Stock	Rp238.131 Rp212.814 Rp204.008 Rp197.770 View Rp177.039 Rp171.719 Rp168.600 Rp165.297 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	10 V CT/5 V	2.4 VA	250 mA/500 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	30.8 mm	DST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-3 DST-3-120 Bel Signal Transformer 1: Rp263.632 100In Stock	Mfr. Part No. DST-3-120 Mouser Part No 530-DST-3-120	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-3 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	100In Stock	Rp263.632 Rp235.746 Rp231.343 Rp209.144 Rp177.773	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	120 V CT/60 V	2.4 VA	20 mA/40 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	30.8 mm	DST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-3 DST-3-28 Bel Signal Transformer 1: Rp257.945 22In Stock 100Expected 03/11/2026	Mfr. Part No. DST-3-28 Mouser Part No 530-DST-3-28	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-3 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	22In Stock 100Expected 03/11/2026	Rp257.945 Rp230.793 Rp226.390 Rp204.925 Rp174.104	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	28 V CT/14 V	2.4 VA	85 mA/170 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	30.8 mm	DST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-3 DST-3-36 Bel Signal Transformer 1: Rp241.066 90In Stock	Mfr. Part No. DST-3-36 Mouser Part No 530-DST-3-36	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-3 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	90In Stock	Rp241.066 Rp221.069 Rp220.702 Rp200.338 View Rp194.101 Rp184.561 Rp179.424 Rp177.039 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	36 V CT/18 V	2.4 VA	65 mA/130 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	30.8 mm	DST
Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-4 DST-4-120 Bel Signal Transformer 1: Rp274.640 35In Stock	Mfr. Part No. DST-4-120 Mouser Part No 530-DST-4-120	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-4 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	35In Stock	Rp274.640 Rp247.121 Rp242.167 Rp212.263 View Rp206.393 Rp200.705 Rp196.486 Rp194.468	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	120 V CT/60 V	6 VA	50 mA/100 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	41.3 mm	33.3 mm	33.3 mm	DST