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 (SGD) 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: $20.90 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	$20.90 $19.09 $17.97 $17.48 View $16.88 $16.31 $15.53 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: $18.39 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	$18.39 $16.85 $15.87 $15.31 View $14.85 $14.18 $13.99 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: $18.66 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	$18.66 $17.01 $16.09 $15.49 View $15.01 $14.42 $14.20 $13.68	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: $22.13 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	$22.13 $20.39 $20.29 $17.23 View $17.22 $16.21 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: $20.50 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	$20.50 $18.78 $17.68 $17.05 View $16.46 $15.78 $15.71 $15.16 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: $38.20 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	$38.20 $34.01 $31.35 $30.60 View $29.82 $29.01 $28.75 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: $18.55 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	$18.55 $15.78 $15.14 $14.63 $12.43	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-3-48 Bel Signal Transformer 1: $22.25 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	$22.25 $18.71 $17.94 $17.73 $15.34	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: $30.83 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	$30.83 $27.78 $25.30 $24.64 View $24.13 $23.47 $23.02 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: $18.35 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	$18.35 $16.31 $15.64 $14.18 View $13.29 $13.08 $12.89 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: $20.01 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	$20.01 $17.94 $17.20 $15.88 View $14.69 $14.39 $14.25 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: $38.20 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	$38.20 $34.42 $30.56 $29.65 View $29.35 $29.09 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: $21.99 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	$21.99 $19.31 $17.79 $17.15 View $16.54 $15.30 $15.12 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: $29.44 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	$29.44 $27.05 $26.18 $25.38 View $24.40 $23.34 $22.75 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: $18.35 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	$18.35 $16.55 $15.87 $14.18 View $13.78 $13.37 $13.12 $12.87 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: $18.35 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	$18.35 $16.55 $15.87 $14.18 View $13.78 $13.37 $13.12 $12.87 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: $19.31 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	$19.31 $17.27 $16.82 $15.74 View $15.22 $14.52 $13.38 $13.11 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: $17.72 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	$17.72 $16.25 $15.27 $14.73 View $14.27 $13.57 $13.21 $13.00	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: $19.72 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	$19.72 $18.31 $17.97 $16.20 $13.84	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: $17.65 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	$17.65 $15.78 $15.12 $14.66 View $13.12 $12.73 $12.50 $12.25 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-3-12 Bel Signal Transformer 1: $19.62 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	$19.62 $17.53 $16.82 $14.54 View $14.31 $14.23 $13.98 $13.84 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-3-120 Bel Signal Transformer 1: $19.54 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	$19.54 $17.48 $17.15 $15.50 $13.18	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: $19.12 22In Stock 100Expected 3/11/2026	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 3/11/2026	$19.12 $17.11 $16.78 $15.19 $12.91	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: $17.87 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	$17.87 $16.39 $16.36 $14.85 View $14.39 $13.68 $13.30 $13.12 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: $20.36 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	$20.36 $18.32 $17.95 $15.74 View $15.30 $14.88 $14.57 $14.42	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