RoHS Compliant Signal Transformer Series Split Tran Transformers Including Bel Fuse DST-4-28 for PCB

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Price: Negotiable

MOQ: Negotiable

Delivery Time: Negotiable

Product Description

Product Overview

The Signal ST / DST Series Split/Tran Specialty Purpose & Class 2 Transformers are designed for printed circuit board mounting, offering superior isolation and low capacitive coupling due to their dual cavity platform. Featuring rigid pin construction for enhanced board insertion reliability, these transformers are available in a range of power ratings from 1.1 VA to 36 VA. They are suitable for applications requiring high isolation and are UL and CSA certified, with RoHS compliance.

Product Attributes

Brand: Signal Transformer (Bel Fuse)
Series: ST / DST Series Split/Tran
Construction: Split Bobbin, Dual Cavity Platform
Pin Construction: Rigid
Insulation System: Class F, 155 C
Compliance: RoHS Compliant
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
Customization: Custom versions available upon request.

Technical Specifications

Product Description	Power Rating (VA)	Dielectric Strength (Vrms Hipot)	Primary Options	Secondary Options	Insulation System	Mounting Hardware	Weight (lbs / kg)	Dimensions (L x W x H inches / mm)
ST/DST Series	1.1 to 36	2500	Single or dual primaries, 115 V or 115/230 V, 50/60 Hz	Series or parallel	Class F, 155 C	See chart (ST-MS, ST-MN available)	0.17 (0.08) to 1.1 (0.50)	Varies by VA rating (e.g., Size 2: 1.37x1.12x0.97)

Part Number Selection & Secondary Ratings

Part Number	Secondary RMS Rating (Series)	Secondary RMS Rating (Parallel)	Pin Configuration	Class 2 Marking
ST-2-10# / DST-2-10#	10 VCT @ 0.11 A	5 V @ 0.22 A	6 Pin (ST) / 8 Pin (DST)	**#
ST-3-10# / DST-3-10#	10 VCT @ 0.25 A	5 V @ 0.5 A	6 Pin (ST) / 8 Pin (DST)	*#
ST-4-10# / DST-4-10#	10 VCT @ 0.6 A	5 V @ 1.2 A	6 Pin (ST) / 8 Pin (DST)	*#
ST-5-10# / DST-5-10#	10 VCT @ 1.2 A	5 V @ 2.4 A	6 Pin (ST) / 8 Pin (DST)	*#
ST-6-10 / DST-6-10	10 VCT @ 2.0 A	5 V @ 4.0 A	6 Pin (ST) / 8 Pin (DST)	None
ST-7-10 / DST-7-10	10 VCT @ 3.6 A	5 V @ 7.2 A	6 Pin (ST) / 8 Pin (DST)	None
ST-2-12# / DST-2-12#	12.6 VCT @ 0.09 A	6.3 V @ 0.18 A	6 Pin (ST) / 8 Pin (DST)	**#
ST-3-12# / DST-3-12#	12.6 VCT @ 0.2 A	6.3 V @ 0.4 A	6 Pin (ST) / 8 Pin (DST)	*#
ST-4-12# / DST-4-12#	12.6 VCT @ 0.5 A	6.3 V @ 1.0 A	6 Pin (ST) / 8 Pin (DST)	*#
ST-5-12# / DST-5-12#	12.6 VCT @ 1.0 A	6.3 V @ 2.0 A	6 Pin (ST) / 8 Pin (DST)	*#
ST-6-12 / DST-6-12	12.6 VCT @ 1.6 A	6.3 V @ 3.2 A	6 Pin (ST) / 8 Pin (DST)	None
ST-7-12 / DST-7-12	12.6 VCT @ 2.85 A	6.3 V @ 5.7 A	6 Pin (ST) / 8 Pin (DST)	None
ST-2-16# / DST-2-16#	16 VCT @ 0.07 A	8 V @ 0.14 A	6 Pin (ST) / 8 Pin (DST)	**#
ST-3-16# / DST-3-16#	16 VCT @ 0.15 A	8 V @ 0.3 A	6 Pin (ST) / 8 Pin (DST)	*#
ST-4-16# / DST-4-16#	16 VCT @ 0.4 A	8 V @ 0.8 A	6 Pin (ST) / 8 Pin (DST)	*#
ST-5-16# / DST-5-16#	16 VCT @ 0.8 A	8 V @ 1.6 A	6 Pin (ST) / 8 Pin (DST)	*#
ST-6-16 / DST-6-16	16 VCT @ 1.25 A	8 V @ 2.5 A	6 Pin (ST) / 8 Pin (DST)	None
ST-7-16 / DST-7-16	16 VCT @ 2.25 A	8 V @ 4.5 A	6 Pin (ST) / 8 Pin (DST)	None
ST-2-20# / DST-2-20#	20 VCT @ 0.055 A	10 V @ 0.11 A	6 Pin (ST) / 8 Pin (DST)	**#
ST-3-20# / DST-3-20#	20 VCT @ 0.12 A	10 V @ 0.24 A	6 Pin (ST) / 8 Pin (DST)	*#
ST-4-20# / DST-4-20#	20 VCT @ 0.3 A	10 V @ 0.6 A	6 Pin (ST) / 8 Pin (DST)	*#
ST-5-20# / DST-5-20#	20 VCT @ 0.6 A	10 V @ 1.2 A	6 Pin (ST) / 8 Pin (DST)	*#
ST-6-20 / DST-6-20	20 VCT @ 1.0 A	10 V @ 2.0 A	6 Pin (ST) / 8 Pin (DST)	None
ST-7-20 / DST-7-20	20 VCT @ 1.8 A	10 V @ 3.6 A	6 Pin (ST) / 8 Pin (DST)	None
ST-2-24# / DST-2-24#	24 VCT @ 0.045 A	12 V @ 0.09 A	6 Pin (ST) / 8 Pin (DST)	**#
ST-3-24# / DST-3-24#	24 VCT @ 0.1 A	12 V @ 0.2 A	6 Pin (ST) / 8 Pin (DST)	*#
ST-4-24# / DST-4-24#	24 VCT @ 0.25 A	12 V @ 0.5 A	6 Pin (ST) / 8 Pin (DST)	*#
ST-5-24# / DST-5-24#	24 VCT @ 0.5 A	12 V @ 1.0 A	6 Pin (ST) / 8 Pin (DST)	*#
ST-6-24 / DST-6-24	24 VCT @ 0.8 A	12 V @ 1.6 A	6 Pin (ST) / 8 Pin (DST)	None
ST-7-24 / DST-7-24	24 VCT @ 1.5 A	12 V @ 3.0 A	6 Pin (ST) / 8 Pin (DST)	None
ST-2-28 / DST-2-28	28 VCT @ 0.04 A	14 V @ 0.08 A	6 Pin (ST) / 8 Pin (DST)	None
ST-3-28 / DST-3-28	28 VCT @ 0.085 A	14 V @ 0.17 A	6 Pin (ST) / 8 Pin (DST)	None
ST-4-28 / DST-4-28	28 VCT @ 0.2 A	14 V @ 0.4 A	6 Pin (ST) / 8 Pin (DST)	None
ST-5-28 / DST-5-28	28 VCT @ 0.42 A	14 V @ 0.84 A	6 Pin (ST) / 8 Pin (DST)	None
ST-6-28 / DST-6-28	28 VCT @ 0.7 A	14 V @ 1.4 A	6 Pin (ST) / 8 Pin (DST)	None
ST-7-28 / DST-7-28	28 VCT @ 1.3 A	14 V @ 2.6 A	6 Pin (ST) / 8 Pin (DST)	None
ST-2-36 / DST-2-36	36 VCT @ 0.03 A	18 V @ 0.06 A	6 Pin (ST) / 8 Pin (DST)	None
ST-3-36 / DST-3-36	36 VCT @ 0.065 A	18 V @ 0.13 A	6 Pin (ST) / 8 Pin (DST)	None
ST-4-36 / DST-4-36	36 VCT @ 0.17 A	18 V @ 0.34 A	6 Pin (ST) / 8 Pin (DST)	None
ST-5-36 / DST-5-36	36 VCT @ 0.35 A	18 V @ 0.7 A	6 Pin (ST) / 8 Pin (DST)	None
ST-6-36 / DST-6-36	36 VCT @ 0.55 A	18 V @ 1.1 A	6 Pin (ST) / 8 Pin (DST)	None
ST-7-36 / DST-7-36	36 VCT @ 1.0 A	18 V @ 2.0 A	6 Pin (ST) / 8 Pin (DST)	None
ST-2-48 / DST-2-48	48 VCT @ 0.023 A	24 V @ 0.046 A	6 Pin (ST) / 8 Pin (DST)	None
ST-3-48 / DST-3-48	48 VCT @ 0.05 A	24 V @ 0.1 A	6 Pin (ST) / 8 Pin (DST)	None
ST-4-48 / DST-4-48	48 VCT @ 0.125 A	24 V @ 0.25 A	6 Pin (ST) / 8 Pin (DST)	None
ST-5-48 / DST-5-48	48 VCT @ 0.25 A	24 V @ 0.5 A	6 Pin (ST) / 8 Pin (DST)	None
ST-6-48 / DST-6-48	48 VCT @ 0.4 A	24 V @ 0.8 A	6 Pin (ST) / 8 Pin (DST)	None
ST-7-48 / DST-7-48	48 VCT @ 0.75 A	24 V @ 1.5 A	6 Pin (ST) / 8 Pin (DST)	None
ST-2-56 / DST-2-56	56 VCT @ 0.02 A	28 V @ 0.04 A	6 Pin (ST) / 8 Pin (DST)	None
ST-3-56 / DST-3-56	56 VCT @ 0.045 A	28 V @ 0.09 A	6 Pin (ST) / 8 Pin (DST)	None
ST-4-56 / DST-4-56	56 VCT @ 0.11 A	28 V @ 0.22 A	6 Pin (ST) / 8 Pin (DST)	None
ST-5-56 / DST-5-56	56 VCT @ 0.22 A	28 V @ 0.44 A	6 Pin (ST) / 8 Pin (DST)	None
ST-6-56 / DST-6-56	56 VCT @ 0.35 A	28 V @ 0.7 A	6 Pin (ST) / 8 Pin (DST)	None
ST-7-56 / DST-7-56	56 VCT @ 0.65A	28 V @ 1.3 A	6 Pin (ST) / 8 Pin (DST)	None
ST-2-120 / DST-2-120	120 VCT @ 0.01 A	60 V @ 0.02 A	6 Pin (ST) / 8 Pin (DST)	None
ST-3-120 / DST-3-120	120 VCT @ 0.02 A	60 V @ 0.04 A	6 Pin (ST) / 8 Pin (DST)	None
ST-4-120 / DST-4-120	120 VCT @ 0.05 A	60 V @ 0.1 A	6 Pin (ST) / 8 Pin (DST)	None
ST-5-120 / DST-5-120	120 VCT @ 0.1 A	60 V @ 0.2 A	6 Pin (ST) / 8 Pin (DST)	None
ST-6-120 / DST-6-120	120 VCT @ 0.16 A	60 V @ 0.32 A	6 Pin (ST) / 8 Pin (DST)	None
ST-7-120 / DST-7-120	120 VCT @ 0.3 A	60 V @ 0.6 A	6 Pin (ST) / 8 Pin (DST)	None

Recommended Secondary Fuse Values

Code	Fuse Value (A)
(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)	Optional Mounting Screw & Nut	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)	Size 7 has 4 mounting holes on 2.18 x 1.75 centers for #6 screws.	1.1 (0.50)