Power Transformers - Board Mount

.hide-partial { max-height: none; } .show-more { display: none; }

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).

.catnav-wrapper { height: auto; overflow: visible; } .catalog-nav-tabs ul { white-space: normal; }

Results: 60

Applied Filters:

Secondary Voltage Rating

Power Rating

Secondary Current Rating

Length

Width

Height

Reset All

Search within results

In Stock

Normally Stocked

Active

New Products

RoHS Compliant

.search-refine-wrapper { display: inline-block; min-width: 100%; } .scroll-body { overflow-x: visible; } .search-table-wrapper { overflow: visible; } .hide-partial { max-height: none; } .show-more { display: none; }

Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (USD) 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: $17.26 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	$17.26 $15.85 $15.44 $13.24 View $13.02 $12.27 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: $13.46 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	$13.46 $12.34 $11.75 $11.74 View $10.33 $10.02 $9.87	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: $12.60 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	$12.60 $11.45 $10.95 $10.70 View $9.50 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: $18.90 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	$18.90 $18.63 $17.33 $14.17 $13.37	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: $15.59 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	$15.59 $14.26 $13.38 $12.96 View $11.93 $11.57 $11.52 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: $20.16 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	$20.16 $17.17 $14.59 $14.04 View $14.00 $13.81 $13.68 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: $19.38 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	$19.38 $18.74 $16.01 $14.04 View $14.00 $13.81 $13.68 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: $23.16 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	$23.16 $20.86 $20.15 $17.81 View $17.16 $16.73	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: $23.96 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	$23.96 $21.50 $20.60 $19.95 View $19.32 $18.51 $17.36 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: $19.96 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	$19.96 $18.41 $17.79 $17.32 View $16.80 $16.25 $15.87 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: $28.32 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	$28.32 $24.69 $23.90 $22.18 View $21.79 $21.19 $20.99 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: $29.31 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	$29.31 $27.99 $22.49 $21.98 View $21.74 $21.53 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: $24.55 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	$24.55 $23.20 $23.19 $22.98 View $19.97 $19.76 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: $28.69 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	$28.69 $25.01 $24.22 $23.63 View $22.09 $21.48 $21.27 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: $23.96 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	$23.96 $22.41 $18.69 $17.95 View $17.72 $17.37 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: $16.47 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	$16.47 $14.43 $13.84 $13.41 View $12.98 $12.38 $12.04 $11.86 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: $12.37 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	$12.37 $11.44 $10.64 $10.24 View $9.92 $9.73 $9.46 $9.23 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: $14.55 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	$14.55 $13.23 $12.68 $12.28 View $11.89 $10.80 $10.48 $10.33 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: $15.22 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	$15.22 $13.80 $13.06 $12.59 View $12.14 $11.53 $11.29 $11.24 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: $12.96 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	$12.96 $11.88 $11.16 $10.77 View $10.43 $9.44 $9.17 $8.97 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: $20.28 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	$20.28 $18.27 $17.51 $16.96 View $16.42 $14.47 $14.17 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: $28.69 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	$28.69 $25.01 $22.87 $22.33 View $21.93 $21.49 $21.29 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: $14.43 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	$14.43 $13.36 $9.57 $9.51 View $9.41 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: $13.70 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	$13.70 $12.24 $11.93 $10.25 View $9.56 $9.49 $9.29	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: $12.49 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	$12.49	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