Power Transformers - Board Mount

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14A One-4-All™ International Transformers

Signal Transformer / Bel 14A (One-4-All) PC and Chassis Mount Transformers are specifically designed to satisfy North American (UL, CSA, CE) and international (VDE, IEC, CSA, CE) transformer regulatory requirements for power isolation in Medical and Dental applications. Signal Transformer / Bel 14A ensures double isolation and low leakage current, surpassing the construction requirements for patient-connected equipment per UL 544 Standard for Medical and Dental Equipment, as well as, the IEC 601-1 Standard for Medical Electrical Equipment. The transformers are dielectric strength tested to 4000V_RMS, provide a UL class F insulation system, and meet the creepage and clearance requirements for both the UL and IEC standards. The 14A series is available in nine PC mount models with 2.5VA-56VA power.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (USD) Filter the results in the table by unit price based on your quantity.	Qty.	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 ONE-4-ALL 20VA 14A-20-12 Bel Signal Transformer 1: $20.77 81In Stock	Mfr. Part # 14A-20-12 Mouser Part # 530-14A-20-12	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER ONE-4-ALL 20VA Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	81In Stock	$20.77 $19.16 $18.51 $17.37 View $16.91 $16.51 Quote	Min.: 1 Mult.: 1	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	47.6 mm	41.3 mm	14A
Power Transformers - Board Mount TRANS CUST ONE-4-ALL MICROPROC 14A-20-515 Bel Signal Transformer 1: $19.01 453In Stock	Mfr. Part # 14A-20-515 Mouser Part # 530-14A-20-515	Bel Signal Transformer	Power Transformers - Board Mount TRANS CUST ONE-4-ALL MICROPROC Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	453In Stock	$19.01 $17.39 $16.32 $15.73 View $15.26 $14.22 $14.10 Quote	Min.: 1 Mult.: 1	115 VAC, 230 VAC	5 V/15 V	20 VA	175 mA/750 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	57.2 mm	47.6 mm	41.3 mm	14A
Power Transformers - Board Mount TRANSFORMER 14A 05VA REVISED 14A-5.0R-24 Bel Signal Transformer 1: $11.92 258In Stock	Mfr. Part # 14A-5.0R-24 Mouser Part # 530-14A-5.0R-24	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER 14A 05VA REVISED Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	258In Stock	$11.92 $10.93 $10.27 $9.89 View $9.59 $9.23 $8.87 $8.65	Min.: 1 Mult.: 1	115 VAC, 230 VAC	24 V CT/12 V	5 VA	210 mA/420 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	41.3 mm	36.5 mm	34.9 mm	14A
Power Transformers - Board Mount TRANSFORMER ONE-4-ALL 56VA 14A-56-28 Bel Signal Transformer 1: $27.39 143In Stock	Mfr. Part # 14A-56-28 Mouser Part # 530-14A-56-28	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER ONE-4-ALL 56VA Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	143In Stock	$27.39 $24.43 $23.65 $22.92 View $22.19 $20.43 $20.10 Quote	Min.: 1 Mult.: 1	115 VAC, 230 VAC	28 V CT/14 V	56 VA	2 A/4 A	Through Hole	Dual Primary Winding	Dual Secondary Winding	76.2 mm	63.5 mm	46.5 mm	14A
Power Transformers - Board Mount TRANSFORMER 14A 10VA REVISED 14A-10R-24 Bel Signal Transformer 1: $12.60 248In Stock	Mfr. Part # 14A-10R-24 Mouser Part # 530-14A-10R-24	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER 14A 10VA REVISED Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	248In Stock	$12.60 $11.53 $11.13 $10.60 $10.46	Min.: 1 Mult.: 1	115 VAC, 230 VAC	24 V CT/12 V	10 VA	420 mA/840 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	47.6 mm	39.7 mm	34.9 mm	14A
Power Transformers - Board Mount TRANSFORMER 14A 10VA REVISED 14A-10R-28 Bel Signal Transformer 1: $13.27 534In Stock	Mfr. Part # 14A-10R-28 Mouser Part # 530-14A-10R-28	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER 14A 10VA REVISED Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	534In Stock	$13.27 $12.16 $11.43 $11.01 View $10.67 $10.18 $9.72	Min.: 1 Mult.: 1	115 VAC, 230 VAC	28 V CT/14 V	10 VA	360 mA/720 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	47.6 mm	39.7 mm	34.9 mm	14A
Power Transformers - Board Mount TRANSFORMER ONE-4-ALL 30VA 14A-30-512 Bel Signal Transformer 1: $22.56 493In Stock	Mfr. Part # 14A-30-512 Mouser Part # 530-14A-30-512	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER ONE-4-ALL 30VA Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	493In Stock	$22.56 $20.33 $19.48 $18.87 View $18.28 $17.20 $17.19 Quote	Min.: 1 Mult.: 1	115 VAC, 230 VAC	5 V/12 V	30 VA	250 mA/1.25 A	Through Hole	Dual Primary Winding	Dual Secondary Winding	66.7 mm	55.5 mm	39.7 mm	14A
Power Transformers - Board Mount TRANSFORMER 14A 10VA REVISED 14A-10R-16 Bel Signal Transformer 1: $13.35 236In Stock	Mfr. Part # 14A-10R-16 Mouser Part # 530-14A-10R-16	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER 14A 10VA REVISED Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	236In Stock	$13.35 $12.11 $11.58 $11.24 View $10.94 $10.54 $10.27 $10.25 Quote	Min.: 1 Mult.: 1	115 VAC, 230 VAC	16 V CT/8 V	10 VA	620 mA/1.25 A	Through Hole	Dual Primary Winding	Dual Secondary Winding	47.6 mm	39.7 mm	34.9 mm	14A
Power Transformers - Board Mount TRANSFORMER 14A 05VA REVISED 14A-5.0R-36 Bel Signal Transformer 1: $12.15 302In Stock	Mfr. Part # 14A-5.0R-36 Mouser Part # 530-14A-5.0R-36	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER 14A 05VA REVISED Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	302In Stock	$12.15 $11.14 $10.47 $10.09 View $9.78 $9.33 $9.05 $8.82	Min.: 1 Mult.: 1	115 VAC, 230 VAC	36 V CT/18 V	5 VA	140 mA/280 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	41.3 mm	36.5 mm	34.9 mm	14A
Power Transformers - Board Mount TRANSFORMER 14A 2.5VA REVISED 14A-2.5R-24 Bel Signal Transformer 1: $13.48 192In Stock	Mfr. Part # 14A-2.5R-24 Mouser Part # 530-14A-2.5R-24	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER 14A 2.5VA REVISED Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	192In Stock	$13.48 $12.36 $11.61 $11.18 View $10.95 $10.03 $9.89 Quote	Min.: 1 Mult.: 1	115 VAC, 230 VAC	24 V CT/12 V	2.5 VA	100 mA/200 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	41.3 mm	36.5 mm	28.6 mm	14A
Power Transformers - Board Mount TRANS CUST ONE-4-ALL MICROPROC 14A-56-515 Bel Signal Transformer 1: $36.42 28In Stock	Mfr. Part # 14A-56-515 Mouser Part # 530-14A-56-515	Bel Signal Transformer	Power Transformers - Board Mount TRANS CUST ONE-4-ALL MICROPROC Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	28In Stock	$36.42 $31.79 $30.39 $28.91 View $28.15 Quote	Min.: 1 Mult.: 1	115 VAC, 230 VAC	5 V/15 V	56 VA	250 mA/3 A	Through Hole	Dual Primary Winding	Dual Secondary Winding	76.2 mm	63.5 mm	46.5 mm	14A
Power Transformers - Board Mount TRANSFORMER 14A 05VA REVISED 14A-5.0R-28 Bel Signal Transformer 1: $11.92 98In Stock 100On Order	Mfr. Part # 14A-5.0R-28 Mouser Part # 530-14A-5.0R-28	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER 14A 05VA REVISED Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	98In Stock 100On Order	$11.92 $10.93 $10.27 $9.89 View $9.29 $9.15 $8.87 $8.65	Min.: 1 Mult.: 1	115 VAC, 230 VAC	28 V CT/14 V	5 VA	180 mA/360 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	41.3 mm	36.5 mm	34.9 mm	14A
Power Transformers - Board Mount TRANSFORMER ONE-4-ALL 30VA 14A-30-24 Bel Signal Transformer 1: $22.96 70In Stock 500Expected 10/23/2026	Mfr. Part # 14A-30-24 Mouser Part # 530-14A-30-24	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER ONE-4-ALL 30VA Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	70In Stock 500Expected 10/23/2026	$22.96 $20.03 $19.39 $19.03 View $18.59 $16.56 $16.04 Quote	Min.: 1 Mult.: 1	115 VAC, 230 VAC	24 V CT/12 V	30 VA	1.25 A/2.5 A	Through Hole	Dual Primary Winding	Dual Secondary Winding	66.7 mm	55.5 mm	39.7 mm	14A
Power Transformers - Board Mount TRANSFORMER ONE-4-ALL 20VA 14A-20-16 Bel Signal Transformer 1: $17.18 101In Stock	Mfr. Part # 14A-20-16 Mouser Part # 530-14A-20-16	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER ONE-4-ALL 20VA Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	101In Stock	$17.18 $14.78 $14.17 $13.73 View $12.62 $11.79 $11.76 Quote	Min.: 1 Mult.: 1	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	47.6 mm	41.3 mm	14A
Power Transformers - Board Mount TRANS CUST ONE-4-ALL MICROPROC 14A-5.0R-10 Bel Signal Transformer 1: $12.67 90In Stock	Mfr. Part # 14A-5.0R-10 Mouser Part # 530-14A-5.0R-10	Bel Signal Transformer	Power Transformers - Board Mount TRANS CUST ONE-4-ALL MICROPROC Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	90In Stock	$12.67 $11.19 $10.73 $9.74 View $9.11 $8.98 $8.84 Quote	Min.: 1 Mult.: 1	115 VAC, 230 VAC	10 V CT/5 V	5 VA	500 mA/1 A	Through Hole	Dual Primary Winding	Dual Secondary Winding	41.3 mm	36.5 mm	34.9 mm	14A
Power Transformers - Board Mount TRANSFORMER 14A 10VA REVISED 14A-10R-20 Bel Signal Transformer 1: $13.75 153In Stock	Mfr. Part # 14A-10R-20 Mouser Part # 530-14A-10R-20	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER 14A 10VA REVISED Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	153In Stock	$13.75 $12.60 $11.85 $11.41 View $11.06 $10.80 Quote	Min.: 1 Mult.: 1	115 VAC, 230 VAC	20 V CT/10 V	10 VA	500 mA/1 A	Through Hole	Dual Primary Winding	Dual Secondary Winding	47.6 mm	39.7 mm	34.9 mm	14A
Power Transformers - Board Mount TRANSFORMER 14A 2.5VA REVISED 14A-2.5R-36 Bel Signal Transformer 1: $16.53 256In Stock	Mfr. Part # 14A-2.5R-36 Mouser Part # 530-14A-2.5R-36	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER 14A 2.5VA REVISED Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	256In Stock	$16.53 $15.25 $14.75 $14.28 View $11.77 $11.28 $9.79 $9.69	Min.: 1 Mult.: 1	115 VAC, 230 VAC	36 V CT/18 V	2.5 VA	70 mA/140 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	41.3 mm	36.5 mm	28.6 mm	14A
Power Transformers - Board Mount TRANSFORMER ONE-4-ALL 20VA 14A-20-28 Bel Signal Transformer 1: $17.18 182In Stock 50On Order	Mfr. Part # 14A-20-28 Mouser Part # 530-14A-20-28	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER ONE-4-ALL 20VA Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	182In Stock 50On Order	$17.18 $14.97 $14.50 $14.04 View $13.60 $13.03 $12.62 Quote	Min.: 1 Mult.: 1	115 VAC, 230 VAC	28 V CT/14 V	20 VA	720 mA/1.44 A	Through Hole	Dual Primary Winding	Dual Secondary Winding	57.2 mm	47.6 mm	41.3 mm	14A
Power Transformers - Board Mount TRANSFORMER ONE-4-ALL 20VA 14A-20-36 Bel Signal Transformer 1: $17.51 144In Stock 100Expected 10/23/2026	Mfr. Part # 14A-20-36 Mouser Part # 530-14A-20-36	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER ONE-4-ALL 20VA Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	144In Stock 100Expected 10/23/2026	$17.51 $15.78 $15.12 $14.64 View $14.18 $13.59 $13.14 Quote	Min.: 1 Mult.: 1	115 VAC, 230 VAC	36 V CT/18 V	20 VA	560 mA/1.12 A	Through Hole	Dual Primary Winding	Dual Secondary Winding	57.2 mm	47.6 mm	41.3 mm	14A
Power Transformers - Board Mount TRANSFORMER 14A 05VA REVISED 14A-5.0R-16 Bel Signal Transformer 1: $14.44 329In Stock	Mfr. Part # 14A-5.0R-16 Mouser Part # 530-14A-5.0R-16	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER 14A 05VA REVISED Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	329In Stock	$14.44 $13.24 $13.09 $12.68 View $12.28 $11.77 $10.75 $10.59 Quote	Min.: 1 Mult.: 1	115 VAC, 230 VAC	16 V CT/8 V	5 VA	310 mA/620 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	41.3 mm	36.5 mm	34.9 mm	14A
Power Transformers - Board Mount TRANSFORMER 14A 10VA REVISED 14A-10R-12 Bel Signal Transformer 1: $13.64 52In Stock	Mfr. Part # 14A-10R-12 Mouser Part # 530-14A-10R-12	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER 14A 10VA REVISED Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	52In Stock	$13.64 $12.37 $11.89 $11.88 View $11.79 $11.41 Quote	Min.: 1 Mult.: 1	115 VAC, 230 VAC	12.6 V CT/6.3 V	10 VA	800 mA/1.6 A	Through Hole	Dual Primary Winding	Dual Secondary Winding	47.6 mm	39.7 mm	34.9 mm	14A
Power Transformers - Board Mount TRANSFORMER 14A 10VA REVISED 14A-2.5R-10 Bel Signal Transformer 1: $11.89 134In Stock	Mfr. Part # 14A-2.5R-10 Mouser Part # 530-14A-2.5R-10	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER 14A 10VA REVISED Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	134In Stock	$11.89 $10.72 $10.28 $9.95 View $9.64 $8.32 $7.86	Min.: 1 Mult.: 1	115 VAC, 230 VAC	10 V CT/5 V	2.5 VA	250 mA/500 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	41.3 mm	36.5 mm	28.6 mm	14A
Power Transformers - Board Mount TRANSFORMER 14A 2.5VA REVISED 14A-2.5R-12 Bel Signal Transformer 1: $13.46 35In Stock	Mfr. Part # 14A-2.5R-12 Mouser Part # 530-14A-2.5R-12	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER 14A 2.5VA REVISED Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	35In Stock	$13.46 $10.71 $10.16 $9.84 View $8.56 $8.33 $8.15	Min.: 1 Mult.: 1	115 VAC, 230 VAC	12.6 V CT/6.3 V	2.5 VA	200 mA/400 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	41.3 mm	36.5 mm	28.6 mm	14A
Power Transformers - Board Mount TRANSFORMER 14A 2.5VA REVISED 14A-2.5R-20 Bel Signal Transformer 1: $12.43 43In Stock	Mfr. Part # 14A-2.5R-20 Mouser Part # 530-14A-2.5R-20	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER 14A 2.5VA REVISED Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	43In Stock	$12.43 $11.36 $10.90 $10.55 View $10.22 $8.55 $8.35	Min.: 1 Mult.: 1	115 VAC, 230 VAC	20 V CT/10 V	2.5 VA	120 mA/240 mA	Through Hole	Dual Primary Winding	Dual Secondary Winding	41.3 mm	36.5 mm	28.6 mm	14A
Power Transformers - Board Mount TRANSFORMER ONE-4-ALL 20VA 14A-20-20 Bel Signal Transformer 1: $16.57 1In Stock	Mfr. Part # 14A-20-20 Mouser Part # 530-14A-20-20	Bel Signal Transformer	Power Transformers - Board Mount TRANSFORMER ONE-4-ALL 20VA Learn More about Bel Signal Transformer signal transformer 14a transformers	Datasheet	1In Stock	$16.57 $15.15 $14.32 $14.02 View $13.43 $13.01 Quote	Min.: 1 Mult.: 1	115 VAC, 230 VAC	20 V CT/10 V	20 VA	1 A/2 A	Through Hole	Dual Primary Winding	Dual Secondary Winding	57.2 mm	47.6 mm	41.3 mm	14A