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).

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Description Datasheet Availability Pricing (CRC) Filter the results in the table by unit price based on your quantity.
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 50\60 Hz, Laminated Transformer
Datasheet
204In 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 50\60 Hz, Laminated Transformer
Datasheet
169In 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 50\60 Hz, Laminated Transformer
Datasheet
198In 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 50\60 Hz, Laminated Transformer
Datasheet
49In 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 50\60 Hz, Laminated Transformer
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 50\60 Hz, Laminated Transformer
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 50\60 Hz, Laminated Transformer
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 50\60 Hz, Laminated Transformer
Datasheet
100In 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 50\60 Hz, Laminated Transformer
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 50\60 Hz, Laminated Transformer
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 50\60 Hz, Laminated Transformer
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 50\60 Hz, Laminated Transformer
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 50\60 Hz, Laminated Transformer
Datasheet
212In 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 50\60 Hz, Laminated Transformer
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 50\60 Hz, Laminated Transformer
Datasheet
379In 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 50\60 Hz, Laminated Transformer
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 50\60 Hz, Laminated Transformer
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 50\60 Hz, Laminated Transformer
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 50\60 Hz, Laminated Transformer
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 50\60 Hz, Laminated Transformer
Datasheet
136In 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 50\60 Hz, Laminated Transformer
Datasheet
69In 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 50\60 Hz, Laminated Transformer
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 50\60 Hz, Laminated Transformer
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 50\60 Hz, Laminated Transformer
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
Bel Signal Transformer Power Transformers - Board Mount 50\60 Hz, Laminated Transformer
Datasheet
49In Stock
100Expected 8/18/2026
Min.: 1
Mult.: 1

Class 2 Transformers 115 VAC 20 V CT/10 V 6 VA 300 mA/600 mA Through Hole Single Primary Winding Dual Secondary Winding 41.3 mm 33.3 mm 33.3 mm ST