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-4 DST-4-20 Bel Signal Transformer 1: Rp316.652 36In Stock	Mfr. Part No. DST-4-20 Mouser Part No 530-DST-4-20	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-4 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	36In Stock	Rp316.652 Rp290.784 Rp283.262 Rp242.901 View Rp238.865 Rp225.105 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	20 V CT/10 V	6 VA	300 mA/600 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-4-28 Bel Signal Transformer 1: Rp246.937 122In Stock	Mfr. Part No. DST-4-28 Mouser Part No 530-DST-4-28	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-4 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	122In Stock	Rp246.937 Rp226.390 Rp215.566 Rp215.382 View Rp189.514 Rp183.827 Rp181.075	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	28 V CT/14 V	6 VA	200 mA/400 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-4-36 Bel Signal Transformer 1: Rp231.160 117In Stock	Mfr. Part No. DST-4-36 Mouser Part No 530-DST-4-36	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-4 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	117In Stock	Rp231.160 Rp210.062 Rp200.889 Rp196.302 View Rp174.287 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	36 V CT/18 V	6 VA	170 mA/340 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-4-56 Bel Signal Transformer 1: Rp346.739 42In Stock	Mfr. Part No. DST-4-56 Mouser Part No 530-DST-4-56	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-4 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	42In Stock	Rp346.739 Rp341.786 Rp317.936 Rp259.963 Rp245.286	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	56 V CT/28 V	6 VA	110 mA/220 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-5-36 Bel Signal Transformer 1: Rp286.014 77In Stock	Mfr. Part No. DST-5-36 Mouser Part No 530-DST-5-36	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-5 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	77In Stock	Rp286.014 Rp261.614 Rp245.469 Rp237.764 View Rp218.868 Rp212.263 Rp211.346 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	36 V CT/18 V	12 VA	350 mA/700 mA	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-5 DST-5-48 Bel Signal Transformer 1: Rp369.855 44In Stock	Mfr. Part No. DST-5-48 Mouser Part No 530-DST-5-48	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-5 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	44In Stock	Rp369.855 Rp315.001 Rp267.668 Rp257.578 View Rp256.844 Rp253.358 Rp250.973 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	48 V CT/24 V	12 VA	250 mA/500 mA	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-5 DST-5-56 Bel Signal Transformer 1: Rp355.545 4In Stock	Mfr. Part No. DST-5-56 Mouser Part No 530-DST-5-56	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-5 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	4In Stock	Rp355.545 Rp343.804 Rp293.719 Rp257.578 View Rp256.844 Rp253.358 Rp250.973 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	56 V CT/28 V	12 VA	220 mA/440 mA	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-6-16 Bel Signal Transformer 1: Rp424.893 70In Stock 75Expected 29/09/2026	Mfr. Part No. DST-6-16 Mouser Part No 530-DST-6-16	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-6 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	70In Stock 75Expected 29/09/2026	Rp424.893 Rp382.698 Rp369.672 Rp326.742 View Rp314.817 Rp306.929	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	16 V CT/8 V	20 VA	1.25 A/2.5 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-6 DST-6-24 Bel Signal Transformer 1: Rp439.570 53In Stock	Mfr. Part No. DST-6-24 Mouser Part No 530-DST-6-24	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-6 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	53In Stock	Rp439.570 Rp394.439 Rp377.928 Rp366.003 View Rp354.445 Rp339.584 Rp318.487 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	24 V CT/12 V	20 VA	800 mA/1.6 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-6 DST-6-28 Bel Signal Transformer 1: Rp366.186 29In Stock	Mfr. Part No. DST-6-28 Mouser Part No 530-DST-6-28	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-6 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	29In Stock	Rp366.186 Rp337.750 Rp326.375 Rp317.753 View Rp308.213 Rp298.123 Rp291.151 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	28 V CT/14 V	20 VA	700 mA/1.4 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-6 DST-7-10 Bel Signal Transformer 1: Rp519.559 34In Stock	Mfr. Part No. DST-7-10 Mouser Part No 530-DST-7-10	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-6 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	34In Stock	Rp519.559 Rp452.963 Rp438.469 Rp406.914 View Rp399.759 Rp388.752 Rp385.083 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	10 V CT/5 V	36 VA	3.6 A/7.2 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-7 DST-7-120 Bel Signal Transformer 1: Rp537.721 16In Stock	Mfr. Part No. DST-7-120 Mouser Part No 530-DST-7-120	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-7 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	16In Stock	Rp537.721 Rp513.505 Rp412.602 Rp403.245 View Rp398.842 Rp394.989 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	120 V CT/60 V	36 VA	300 mA/600 mA	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-7 DST-7-24 Bel Signal Transformer 1: Rp450.394 49In Stock	Mfr. Part No. DST-7-24 Mouser Part No 530-DST-7-24	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-7 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	49In Stock	Rp450.394 Rp425.627 Rp425.444 Rp421.591 View Rp366.370 Rp362.517 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	24 V CT/12 V	36 VA	1.5 A/3 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-7 DST-7-48 Bel Signal Transformer 1: Rp526.347 14In Stock	Mfr. Part No. DST-7-48 Mouser Part No 530-DST-7-48	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-7 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	14In Stock	Rp526.347 Rp458.833 Rp444.340 Rp433.516 View Rp405.263 Rp394.072 Rp390.219 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	48 V CT/24 V	36 VA	750 mA/1.5 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-6 DST-6-120 Bel Signal Transformer 1: Rp439.570 1In Stock	Mfr. Part No. DST-6-120 Mouser Part No 530-DST-6-120	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-6 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	1In Stock	Rp439.570 Rp411.134 Rp342.887 Rp329.311 View Rp325.091 Rp318.670 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	120 V CT/60 V	20 VA	160 mA/320 mA	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-3 DST-3-16 Bel Signal Transformer 1: Rp302.159 154Expected 20/11/2026	Mfr. Part No. DST-3-16 Mouser Part No 530-DST-3-16	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-3 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	154Expected 20/11/2026	Rp302.159 Rp264.733 Rp253.909 Rp246.020 View Rp238.131 Rp227.123 Rp220.886 Rp217.584 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	16 V CT/8 V	2.4 VA	150 mA/300 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-3-24 Bel Signal Transformer 1: Rp226.940 700Expected 27/10/2026	Mfr. Part No. DST-3-24 Mouser Part No 530-DST-3-24	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-3 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	700Expected 27/10/2026	Rp226.940 Rp209.878 Rp195.201 Rp187.863 View Rp181.992 Rp178.507 Rp173.553 Rp169.334 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	24 V CT/12 V	2.4 VA	100 mA/200 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-4-48 Bel Signal Transformer 1: Rp266.934 200On Order	Mfr. Part No. DST-4-48 Mouser Part No 530-DST-4-48	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-4 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	200On Order On Order Ship Dates Mfr. No: DST-4-48 Stock: 0 On Order: 100 Expected 09/10/2026 100 Expected 11/11/2026 Factory Lead Time: 18 Weeks	Rp266.934 Rp242.718 Rp232.627 Rp225.289 View Rp218.134 Rp198.137 Rp192.266 Rp189.514 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	48 V CT/24 V	6 VA	125 mA/250 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-5-28 Bel Signal Transformer 1: Rp279.226 889On Order	Mfr. Part No. DST-5-28 Mouser Part No 530-DST-5-28	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-5 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	889On Order On Order Ship Dates Mfr. No: DST-5-28 Stock: 0 On Order: 414 Expected 23/10/2026 475 Expected 20/11/2026 Factory Lead Time: 18 Weeks	Rp279.226 Rp253.175 Rp239.599 Rp230.976 View Rp222.720 Rp211.529 Rp207.126 Rp206.209 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	28 V CT/14 V	12 VA	420 mA/840 mA	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-3 DST-3-20 Bel Signal Transformer 1: Rp237.764 97Expected 23/10/2026	Mfr. Part No. DST-3-20 Mouser Part No 530-DST-3-20	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-3 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	97Expected 23/10/2026	Rp237.764 Rp217.950 Rp204.741 Rp197.586 View Rp191.349 Rp173.186 Rp168.233 Rp164.564 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	20 V CT/10 V	2.4 VA	120 mA/240 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-5 DST-5-12 Bel Signal Transformer 1: Rp372.057 92Expected 08/10/2026	Mfr. Part No. DST-5-12 Mouser Part No 530-DST-5-12	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-5 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	92Expected 08/10/2026	Rp372.057 Rp335.181 Rp321.238 Rp311.148 View Rp301.241 Rp265.467 Rp259.963 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	12.6 V CT/6.3 V	12 VA	1 A/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-7 DST-7-36 Bel Signal Transformer 1: Rp526.347 60Expected 15/01/2027	Mfr. Part No. DST-7-36 Mouser Part No 530-DST-7-36	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-7 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	60Expected 15/01/2027	Rp526.347 Rp458.833 Rp419.573 Rp409.666 View Rp402.328 Rp394.256 Rp390.586 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	36 V CT/18 V	36 VA	1 A/2 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-2-20 Bel Signal Transformer 1: Rp264.733 Non-Stocked Lead-Time 18 Weeks	Mfr. Part No. DST-2-20 Mouser Part No 530-DST-2-20	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-2 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	Non-Stocked Lead-Time 18 Weeks	Rp264.733 Rp245.103 Rp175.571 Rp174.470 View Rp172.636 Quote	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	20 V CT/10 V	1.1 VA	55 mA/110 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-2-36 Bel Signal Transformer 1: Rp251.340 Non-Stocked Lead-Time 18 Weeks	Mfr. Part No. DST-2-36 Mouser Part No 530-DST-2-36	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-2 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	Non-Stocked Lead-Time 18 Weeks	Rp251.340 Rp224.555 Rp218.868 Rp188.047 View Rp175.388 Rp174.104 Rp170.434	Min.: 1 Mult.: 1	Class 2 Transformers	115 VAC, 230 VAC	36 V CT/18 V	1.1 VA	30 mA/60 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-2-48 Bel Signal Transformer 100: Rp229.142 Non-Stocked Lead-Time 18 Weeks	Mfr. Part No. DST-2-48 Mouser Part No 530-DST-2-48	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN DST-2 Learn More about Bel Signal Transformer signal transformers dst transformers	Datasheet	Non-Stocked Lead-Time 18 Weeks	Rp229.142	Min.: 100 Mult.: 100	Class 2 Transformers	115 VAC, 230 VAC	48 V CT/24 V	1.1 VA	23 mA/46 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	34.9 mm	28.6 mm	24.6 mm	DST