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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Description Datasheet Availability Pricing (CHF) Filter the results in the table by unit price based on your quantity.
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Primary Voltage Rating
Secondary Voltage Rating
Power Rating
Secondary Current Rating
Mounting Style
Primary Winding
Secondary Winding
Length
Width
Height
Series
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
49In Stock
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
122In Stock
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
118In Stock
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
55In Stock
100Expected 9/30/2026
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
42In Stock
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
4In Stock
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
39In Stock
425On Order
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
46In Stock
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
4In Stock
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
47In Stock
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
53In Stock
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
29In Stock
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
34In Stock
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
16In Stock
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
59In Stock
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
15In Stock
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
1In Stock
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
700Expected 10/27/2026
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
145On Order
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
80Expected 8/18/2026
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
100Expected 8/18/2026
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
97Expected 9/30/2026
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
Non-Stocked Lead-Time 18 Weeks
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
Non-Stocked Lead-Time 18 Weeks
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
Non-Stocked Lead-Time 18 Weeks
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