ST Class 2 Transformers

Signal Transformer / Bel ST Class 2 Transformers provide superior isolation and low capacitive coupling. These split-bobbin, low-power transformers feature a power rating of 1.1VA to 36VA and are available in 60 standard configurations. Signal Transformer / Bel ST Class 2 Transformers are recognized to UL 506 and meet the specifications for UL 1446 (E66312).

Results: 60
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Primary Voltage Rating
Secondary Voltage Rating
Power Rating
Secondary Current Rating
Mounting Style
Primary Winding
Secondary Winding
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Width
Height
Series
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-4
Datasheet
77In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 28 V CT/14 V 6 VA 200 mA/400 mA Through Hole Single Primary Winding Dual Secondary Winding 41.3 mm 33.3 mm 33.3 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-4
Datasheet
136In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 36 V CT/18 V 6 VA 170 mA/340 mA Through Hole Single Primary Winding Dual Secondary Winding 41.3 mm 33.3 mm 33.3 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-5
Datasheet
43In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 20 V CT/10 V 12 VA 600 mA/1.2 A Through Hole Single Primary Winding Dual Secondary Winding 48.4 mm 40.4 mm 36.9 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-5
Datasheet
19In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 28 V CT/14 V 12 VA 420 mA/840 mA Through Hole Single Primary Winding Dual Secondary Winding 48.4 mm 40.4 mm 36.9 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-5
Datasheet
26In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 48 V CT/24 V 12 VA 250 mA/500 mA Through Hole Single Primary Winding Dual Secondary Winding 48.4 mm 40.4 mm 36.9 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-6
Datasheet
5In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 24 V CT/12 V 20 VA 800 mA/1.6 A Through Hole Single Primary Winding Dual Secondary Winding 57.2 mm 47.8 mm 36.9 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-6
Datasheet
14In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 28 V CT/14 V 20 VA 700 mA/1.4 A Through Hole Single Primary Winding Dual Secondary Winding 57.2 mm 47.8 mm 36.9 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-7
Datasheet
18In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 12.6 V CT/6.3 V 36 VA 2.85 A/5.7 A Through Hole Single Primary Winding Dual Secondary Winding 66.7 mm 55.5 mm 40.4 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-7
Datasheet
40In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 20 V CT/10 V 36 VA 1.8 A/3.6 A Through Hole Single Primary Winding Dual Secondary Winding 66.7 mm 55.5 mm 40.4 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-7
Datasheet
10In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 48 V CT/24 V 36 VA 750 mA/1.5 A Through Hole Single Primary Winding Dual Secondary Winding 66.7 mm 55.5 mm 40.4 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-3
Datasheet
397Expected 18/09/2026
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 16 V CT/8 V 2.4 VA 150 mA/300 mA Through Hole Single Primary Winding Dual Secondary Winding 34.9 mm 28.6 mm 30.8 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-4
Datasheet
200Expected 06/11/2026
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 12.6 V CT/6.3 V 6 VA 500 mA/1 A Through Hole Single Primary Winding Dual Secondary Winding 41.3 mm 33.3 mm 33.3 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-5
Datasheet
100Expected 25/09/2026
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 16 V CT/8 V 12 VA 800 mA/1.6 A Through Hole Single Primary Winding Dual Secondary Winding 48.4 mm 40.4 mm 36.9 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-2
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 16 V CT/8 V 1.1 VA 70 mA/140 mA Through Hole Single Primary Winding Dual Secondary Winding 34.9 mm 28.6 mm 24.6 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-2
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 20 V CT/10 V 1.1 VA 55 mA/110 mA Through Hole Single Primary Winding Dual Secondary Winding 34.9 mm 28.6 mm 24.6 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-2
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 36 V CT/18 V 1.1 VA 30 mA/60 mA Through Hole Single Primary Winding Dual Secondary Winding 34.9 mm 28.6 mm 24.6 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-2
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 56 V CT/28 V 1.1 VA 20 mA/40 mA Through Hole Single Primary Winding Dual Secondary Winding 34.9 mm 28.6 mm 24.6 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-3
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 120 V CT/60 V 2.4 VA 20 mA/40 mA Through Hole Single Primary Winding Dual Secondary Winding 34.9 mm 28.6 mm 30.8 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-3
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 10 V CT/5 V 6 VA 600 mA/1.2 A Through Hole Single Primary Winding Dual Secondary Winding 41.3 mm 33.3 mm 33.3 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-4
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 120 V CT/60 V 6 VA 50 mA/100 mA Through Hole Single Primary Winding Dual Secondary Winding 41.3 mm 33.3 mm 33.3 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-4
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 48 V CT/24 V 6 VA 125 mA/250 mA Through Hole Single Primary Winding Dual Secondary Winding 41.3 mm 33.3 mm 33.3 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-4
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 100
Mult.: 50

Class 2 Transformers 115 VAC 56 V CT/28 V 6 VA 110 mA/220 mA Through Hole Single Primary Winding Dual Secondary Winding 41.3 mm 33.3 mm 33.3 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-4
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 10 V CT/5 V 12 VA 1.2 A/2.4 A Through Hole Single Primary Winding Dual Secondary Winding 48.4 mm 40.4 mm 36.9 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-5
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 120 V CT/60 V 12 VA 100 mA/200 mA Through Hole Single Primary Winding Dual Secondary Winding 48.4 mm 40.4 mm 36.9 mm ST
Bel Signal Transformer Power Transformers - Board Mount TRANSFORMER SPLIT-TRAN ST-5
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 24 V CT/12 V 12 VA 500 mA/1 A Through Hole Single Primary Winding Dual Secondary Winding 48.4 mm 40.4 mm 36.9 mm ST