Class 2 split bobbin transformer Bel Fuse DST-7-28 designed for low capacitive

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Secondary Winding	2
Isolation Voltage(Vrms)	2.5kV
Primary Winding(s)	2
Secondary Side Voltage	14V;28V
Output Current	2.6A;1.3A
Primary Side Voltage	115V;230V
Description	Through Hole-8P,66.7x55.5mm Power Transformers RoHS
Mfr. Part #	DST-7-28
Package	Through Hole-8P,66.7x55.5mm
Model Number	DST-7-28

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Product Specification


Secondary Winding	2	Isolation Voltage(Vrms)	2.5kV
Primary Winding(s)	2	Secondary Side Voltage	14V;28V
Output Current	2.6A;1.3A	Primary Side Voltage	115V;230V
Description	Through Hole-8P,66.7x55.5mm Power Transformers RoHS	Mfr. Part #	DST-7-28
Package	Through Hole-8P,66.7x55.5mm	Model Number	DST-7-28

Bel Fuse Signal ST / DST Series Split/Tran Specialty Purpose & Class 2 Transformers

Product Overview
The Bel Fuse Signal ST and DST Series Split/Tran transformers are specialty purpose and Class 2 transformers designed for printed circuit board mounting. Utilizing a split bobbin construction with dual cavities, these transformers offer superior isolation and low capacitive coupling. Their rigid pin construction ensures easier board insertion and enhanced reliability. These transformers are suitable for a wide range of applications requiring reliable power conversion and isolation.

Product Attributes

Brand: Bel Fuse Signal
Series: ST / DST Series Split/Tran
Construction: Split Bobbin with Dual Cavity
Insulation System: Class F, 155 C
RoHS Compliant: Yes
Agency Certifications:
- UL 1446 Class F insulation systems, File # E66312
- UL Recognized 506 / UL 5085-1, 2, File # E63829
- CSA certified to C22.2 #66.1, File # 221070
- cCSAus certified to C22.2 #66.3 / UL 5085-3, File #221070
- Class 2 - marked with (*) or (**) or (#)
- (*) CSA certified as Inherently Limited
- (**) CSA certified as Non Inherently Limited - see recommended fuse rating table.
- (#) UL Recognized UL5085-3, Inherently Limited File # E116583

Technical Specifications

General Specifications

Specification	Value
Power	1.1 VA to 36 VA
Dielectric Strength	2500 Vrms Hipot
Primaries	Single or dual primaries, 115 V or 115/230 V, 50/60 Hz
Secondaries	Series or parallel
Electrostatic Shield	Not necessary, split bobbin construction
Insulation System	Class F, 155 C

Part Number Selection & Secondary Ratings

Part Number	Secondary RMS Rating	Pin Configuration	VA Rating
ST-2-10**#	10 VCT @ 0.11 A	6 Pin (ST)	1.1
DST-2-10**#	5 V @ 0.22 A	8 Pin (DST)	1.1
ST-3-10*#	10 VCT @ 0.25 A (5)	6 Pin (ST)	2.4
DST-3-10*#	5 V @ 0.5 A (9)	8 Pin (DST)	2.4
ST-4-10*#	10 VCT @ 0.6 A (9)	6 Pin (ST)	6
DST-4-10*#	5 V @ 1.2 A (11)	8 Pin (DST)	6
ST-5-10*#	10 VCT @ 1.2 A (11)	6 Pin (ST)	12
DST-5-10*#	5 V @ 2.4 A (13)	8 Pin (DST)	12
ST-6-10	10 VCT @ 2.0 A	6 Pin (ST)	20
DST-6-10	5 V @ 4.0 A	8 Pin (DST)	20
ST-7-10	10 VCT @ 3.6 A	6 Pin (ST)	36
DST-7-10	5 V @ 7.2 A	8 Pin (DST)	36
ST-2-12**#	12.6 VCT @ 0.09 A	6 Pin (ST)	1.1
DST-2-12**#	6.3 V @ 0.18 A	8 Pin (DST)	1.1
ST-3-12*#	12.6 VCT @ 0.2 A (4)	6 Pin (ST)	2.4
DST-3-12*#	6.3 V @ 0.4 A (8)	8 Pin (DST)	2.4
ST-4-12*#	12.6 VCT @ 0.5 A (9)	6 Pin (ST)	6
DST-4-12*#	6.3 V @ 1.0 A (11)	8 Pin (DST)	6
ST-5-12*#	12.6 VCT @ 1.0 A (11)	6 Pin (ST)	12
DST-5-12*#	6.3 V @ 2.0 A (13)	8 Pin (DST)	12
ST-6-12	12.6 VCT @ 1.6 A	6 Pin (ST)	20
DST-6-12	6.3 V @ 3.2 A	8 Pin (DST)	20
ST-7-12	12.6 VCT @ 2.85 A	6 Pin (ST)	36
DST-7-12	6.3 V @ 5.7 A	8 Pin (DST)	36
ST-2-16**#	16 VCT @ 0.07 A	6 Pin (ST)	1.1
DST-2-16**#	8 V @ 0.14 A	8 Pin (DST)	1.1
ST-3-16*#	16 VCT @ 0.15 A (3)	6 Pin (ST)	2.4
DST-3-16*#	8 V @ 0.3 A (6)	8 Pin (DST)	2.4
ST-4-16*#	16 VCT @ 0.4 A (7)	6 Pin (ST)	6
DST-4-16*#	8 V @ 0.8 A (10)	8 Pin (DST)	6
ST-5-16*#	16 VCT @ 0.8 A (10)	6 Pin (ST)	12
DST-5-16*#	8 V @ 1.6 A (12)	8 Pin (DST)	12
ST-6-16	16 VCT @ 1.25 A	6 Pin (ST)	20
DST-6-16	8 V @ 2.5 A	8 Pin (DST)	20
ST-7-16	16 VCT @ 2.25 A	6 Pin (ST)	36
DST-7-16	8 V @ 4.5 A	8 Pin (DST)	36
ST-2-20**#	20 VCT @ 0.055 A	6 Pin (ST)	1.1
DST-2-20**#	10 V @ 0.11 A	8 Pin (DST)	1.1
ST-3-20*#	20 VCT @ 0.12 A (2)	6 Pin (ST)	2.4
DST-3-20*#	10 V @ 0.24 A (5)	8 Pin (DST)	2.4
ST-4-20*#	20 VCT @ 0.3 A (6)	6 Pin (ST)	6
DST-4-20*#	10 V @ 0.6 A (9)	8 Pin (DST)	6
ST-5-20*#	20 VCT @ 0.6 A (9)	6 Pin (ST)	12
DST-5-20*#	10 V @ 1.2 A (11)	8 Pin (DST)	12
ST-6-20	20 VCT @ 1.0 A	6 Pin (ST)	20
DST-6-20	10 V @ 2.0 A	8 Pin (DST)	20
ST-7-20	20 VCT @ 1.8 A	6 Pin (ST)	36
DST-7-20	10 V @ 3.6 A	8 Pin (DST)	36
ST-2-24**#	24 VCT @ 0.045 A	6 Pin (ST)	1.1
DST-2-24**#	12 V @ 0.09 A	8 Pin (DST)	1.1
ST-3-24*#	24 VCT @ 0.1 A (1)	6 Pin (ST)	2.4
DST-3-24*#	12 V @ 0.2 A (4)	8 Pin (DST)	2.4
ST-4-24*#	24 VCT @ 0.25 A (5)	6 Pin (ST)	6
DST-4-24*#	12 V @ 0.5 A (9)	8 Pin (DST)	6
ST-5-24*#	24 VCT @ 0.5 A (9)	6 Pin (ST)	12
DST-5-24*#	12 V @ 1.0 A (11)	8 Pin (DST)	12
ST-6-24	24 VCT @ 0.8 A	6 Pin (ST)	20
DST-6-24	12 V @ 1.6 A	8 Pin (DST)	20
ST-7-24	24 VCT @ 1.5 A	6 Pin (ST)	36
DST-7-24	12 V @ 3.0 A	8 Pin (DST)	36
ST-2-28	28 VCT @ 0.04 A	6 Pin (ST)	1.1
DST-2-28	14 V @ 0.08 A	8 Pin (DST)	1.1
ST-3-28	28 VCT @ 0.085 A	6 Pin (ST)	2.4
DST-3-28	14 V @ 0.17 A	8 Pin (DST)	2.4
ST-4-28	28 VCT @ 0.2 A	6 Pin (ST)	6
DST-4-28	14 V @ 0.4 A	8 Pin (DST)	6
ST-5-28	28 VCT @ 0.42 A	6 Pin (ST)	12
DST-5-28	14 V @ 0.84 A	8 Pin (DST)	12
ST-6-28	28 VCT @ 0.7 A	6 Pin (ST)	20
DST-6-28	14 V @ 1.4 A	8 Pin (DST)	20
ST-7-28	28 VCT @ 1.3 A	6 Pin (ST)	36
DST-7-28	14 V @ 2.6 A	8 Pin (DST)	36
ST-2-36	36 VCT @ 0.03 A	6 Pin (ST)	1.1
DST-2-36	18 V @ 0.06 A	8 Pin (DST)	1.1
ST-3-36	36 VCT @ 0.065 A	6 Pin (ST)	2.4
DST-3-36	18 V @ 0.13 A	8 Pin (DST)	2.4
ST-4-36	36 VCT @ 0.17 A	6 Pin (ST)	6
DST-4-36	18 V @ 0.34 A	8 Pin (DST)	6
ST-5-36	36 VCT @ 0.35 A	6 Pin (ST)	12
DST-5-36	18 V @ 0.7 A	8 Pin (DST)	12
ST-6-36	36 VCT @ 0.55 A	6 Pin (ST)	20
DST-6-36	18 V @ 1.1 A	8 Pin (DST)	20
ST-7-36	36 VCT @ 1.0 A	6 Pin (ST)	36
DST-7-36	18 V @ 2.0 A	8 Pin (DST)	36
ST-2-48	48 VCT @ 0.023 A	6 Pin (ST)	1.1
DST-2-48	24 V @ 0.046 A	8 Pin (DST)	1.1
ST-3-48	48 VCT @ 0.05 A	6 Pin (ST)	2.4
DST-3-48	24 V @ 0.1 A	8 Pin (DST)	2.4
ST-4-48	48 VCT @ 0.125 A	6 Pin (ST)	6
DST-4-48	24 V @ 0.25 A	8 Pin (DST)	6
ST-5-48	48 VCT @ 0.25 A	6 Pin (ST)	12
DST-5-48	24 V @ 0.5 A	8 Pin (DST)	12
ST-6-48	48 VCT @ 0.4 A	6 Pin (ST)	20
DST-6-48	24 V @ 0.8 A	8 Pin (DST)	20
ST-7-48	48 VCT @ 0.75 A	6 Pin (ST)	36
DST-7-48	24 V @ 1.5 A	8 Pin (DST)	36
ST-2-56	56 VCT @ 0.02 A	6 Pin (ST)	1.1
DST-2-56	28 V @ 0.04 A	8 Pin (DST)	1.1
ST-3-56	56 VCT @ 0.045 A	6 Pin (ST)	2.4
DST-3-56	28 V @ 0.09 A	8 Pin (DST)	2.4
ST-4-56	56 VCT @ 0.11 A	6 Pin (ST)	6
DST-4-56	28 V @ 0.22 A	8 Pin (DST)	6
ST-5-56	56 VCT @ 0.22 A	6 Pin (ST)	12
DST-5-56	28 V @ 0.44 A	8 Pin (DST)	12
ST-6-56	56 VCT @ 0.35 A	6 Pin (ST)	20
DST-6-56	28 V @ 0.7 A	8 Pin (DST)	20
ST-7-56	56 VCT @ 0.65 A	6 Pin (ST)	36
DST-7-56	28 V @ 1.3 A	8 Pin (DST)	36
ST-2-120	120 VCT @ 0.01 A	6 Pin (ST)	1.1
DST-2-120	60 V @ 0.02 A	8 Pin (DST)	1.1
ST-3-120	120 VCT @ 0.02 A	6 Pin (ST)	2.4
DST-3-120	60 V @ 0.04 A	8 Pin (DST)	2.4
ST-4-120	120 VCT @ 0.05 A	6 Pin (ST)	6
DST-4-120	60 V @ 0.1 A	8 Pin (DST)	6
ST-5-120	120 VCT @ 0.1 A	6 Pin (ST)	12
DST-5-120	60 V @ 0.2 A	8 Pin (DST)	12
ST-6-120	120 VCT @ 0.16 A	6 Pin (ST)	20
DST-6-120	60 V @ 0.32 A	8 Pin (DST)	20
ST-7-120	120 VCT @ 0.3 A	6 Pin (ST)	36
DST-7-120	60 V @ 0.6 A	8 Pin (DST)	36

Recommended Secondary Fuse Values

Code	Value
(1)	0.125 A
(2)	0.15 A
(3)	0.25 A
(4)	0.3 A
(5)	0.375 A
(6)	0.4 A
(7)	0.5 A
(8)	0.6 A
(9)	0.75 A
(10)	1.0 A
(11)	1.5 A
(12)	2.0 A
(13)	3.0 A

Mechanical Specifications

Size	VA	L (inches/mm)	W (inches/mm)	H (inches/mm)	ML (inches/mm)	A (inches/mm)	B (inches/mm)	C (inches/mm)	Mounting Hardware	Weight (lbs/kg)
2	1.1	1.37 (34.9)	1.12 (28.6)	0.97 (24.6)	-	0.25 (6.4)	0.25 (6.4)	1.20 (30.5)	-	0.17 (0.08)
3	2.4	1.37 (34.9)	1.12 (28.6)	1.21 (30.8)	-	0.25 (6.4)	0.25 (6.4)	1.20 (30.5)	-	0.25 (0.11)
4	6	1.62 (41.3)	1.31 (33.3)	1.31 (33.3)	1.06 (26.9)	0.25 (6.4)	0.35 (8.9)	1.25 (31.8)	Nylon 4-40 x 1.37 (4-40 x 34.9)	0.44 (0.20)
5	12	1.91 (48.4)	1.59 (40.4)	1.45 (36.9)	1.25 (31.8)	0.30 (7.6)	0.40 (10.2)	1.41 (35.8)	Nylon 4-40 x 1.37 (4-40 x 34.9)	0.70 (0.32)
6	20	2.25 (57.2)	1.88 (47.8)	1.45 (36.9)	1.50 (38.1)	0.30 (7.6)	0.40 (10.2)	1.60 (40.6)	Nylon 4-40 x 1.37 (4-40 x 34.9)	0.80 (0.36)
7	36	2.62 (66.7)	2.18 (55.5)	1.59 (40.4)	-	0.40 (10.2)	0.40 (10.2)	1.85 (47.0)	4 mounting holes on 2.18 x 1.75 centers for #6 screws	1.1 (0.50)

Mounting screw (ST-MS) and nut (ST-MN) available from Signal.

Pin identification: 1, 2, 3, 4, 5, 6, 7, 8. Indicates like polarity.

2411272143_Bel-Fuse-DST-7-28_C17619949.pdf

Company Details

Bronze Gleitlager

Bronze Sleeve Bushings

and

Graphite Plugged Bushings

from Quality China Factory

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Business Type:

Manufacturer,Distributor/Wholesaler,Agent,Importer 
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Year Established:

2009 
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Employee Number:

>300 
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Ecer Certification：

Verified Supplier 

Changsha Purple Horn E-Commerce Co., Ltd. is a professional company focus on integrated circuit ic business. Changsha Purple Horn will also responsible with exporting and logistic business. there is professional factory Changsha Purple Horn which focus on desigining and manufacture. ... Changsha Purple Horn E-Commerce Co., Ltd. is a professional company focus on integrated circuit ic business. Changsha Purple Horn will also responsible with exporting and logistic business. there is professional factory Changsha Purple Horn which focus on desigining and manufacture. ...

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Changsha Purple Horn E-Commerce Co., Ltd.
2332 Kaibin Commercial Plaza, No. 419 Shaoshan Middle Road, Shazitang Street, Yuhua District, Changsha City, Hunan Province
https://www.ictransformer.com/

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