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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Qty. RoHS ECAD Model Product
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 TRANSFORMER SPLIT-TRAN ST-7
Datasheet
78In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 24 V CT/12 V 36 VA 1.5 A/3 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-6
Datasheet
178In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 20 V CT/10 V 20 VA 1 A/2 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-2
Datasheet
196In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 120 V CT/60 V 1.1 VA 10 mA/20 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-6
Datasheet
95In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 36 V CT/18 V 20 VA 550 mA/1.1 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-3
Datasheet
80In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 20 V CT/10 V 2.4 VA 120 mA/240 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-5
Datasheet
37In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 12.6 V CT/6.3 V 12 VA 1 A/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-7
Datasheet
48In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 28 V CT/14 V 36 VA 1.3 A/2.6 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-5
Datasheet
75In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 56 V CT/28 V 12 VA 220 mA/440 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
97In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 36 V CT/18 V 12 VA 350 mA/700 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-3
Datasheet
98In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 48 V CT/24 V 2.4 VA 50 mA/100 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-2
Datasheet
200In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 28 V CT/14 V 1.1 VA 40 mA/80 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
197In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 10 V CT/5 V 2.4 VA 250 mA/500 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
250In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 12.6 V CT/6.3 V 2.4 VA 200 mA/400 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
363In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 24 V CT/12 V 6 VA 250 mA/500 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
148In 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-6
Datasheet
90In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 16 V CT/8 V 20 VA 1.25 A/2.5 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 HF POE SMT XFMR EP10 8PIN 7W
Datasheet
64In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 10 V CT/5 V 1.1 VA 110 mA/220 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
43In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 12.6 V CT/6.3 V 1.1 VA 90 mA/180 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
18In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 24 V CT/12 V 1.1 VA 45 mA/90 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
28In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 48 V CT/24 V 1.1 VA 23 mA/46 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
132In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 24 V CT/12 V 2.4 VA 100 mA/200 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
67In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 28 V CT/14 V 2.4 VA 85 mA/170 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
148In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 36 V CT/18 V 2.4 VA 65 mA/130 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
14In Stock
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 56 V CT/28 V 2.4 VA 45 mA/90 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
54In Stock
200Expected 10/23/2026
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 16 V CT/8 V 6 VA 400 mA/800 mA Through Hole Single Primary Winding Dual Secondary Winding 41.3 mm 33.3 mm 33.3 mm ST