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Specifications
Secondary Winding:
2
Isolation Voltage(Vrms):
2.5kV
Primary Winding(s):
1
Secondary Side Voltage:
14V;28V
Output Current:
2.6A;1.3A
Primary Side Voltage:
115V
Mfr. Part #:
ST-7-28
Package:
Through Hole-6P,66.7x55.5mm
Key Attributes
Model Number:
ST-7-28
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 reliability and ease of board insertion, these transformers are suitable for a wide range of power applications from 1.1 VA to 36 VA. They are built with a Class F insulation system (155C) and meet stringent agency certifications including UL and CSA standards, with options for Class 2 designation. Custom versions are available upon request.
Product Attributes
- Brand: Signal (Bel Fuse)
- Series: ST / DST Series Split/Tran
- Construction: Split Bobbin with Dual Cavity
- Insulation System: Class F (155C)
- 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
| Part Number | VA Rating | Secondary RMS Rating (Series) | Secondary RMS Rating (Parallel) | Primary Configuration | Pin Configuration | Dimensions (L x W x H) | Weight (lbs/kg) | Mounting Hardware (Optional) |
|---|---|---|---|---|---|---|---|---|
| ST-2-10**# / DST-2-10**# | 1.1 | 10 VCT @ 0.11 A | 5 V @ 0.22 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) | 0.17 (0.08) | - |
| ST-3-10*# / DST-3-10*# | 2.4 | 10 VCT @ 0.25 A | 5 V @ 0.5 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) | 0.25 (0.11) | - |
| ST-4-10*# / DST-4-10*# | 6 | 10 VCT @ 0.6 A | 5 V @ 1.2 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) | 0.44 (0.20) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-5-10*# / DST-5-10*# | 12 | 10 VCT @ 1.2 A | 5 V @ 2.4 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) | 0.70 (0.32) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-6-10 / DST-6-10 | 20 | 10 VCT @ 2.0 A | 5 V @ 4.0 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) | 0.80 (0.36) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-7-10 / DST-7-10 | 36 | 10 VCT @ 3.6 A | 5 V @ 7.2 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) | 1.1 (0.50) | 4 mounting holes on 2.18 x 1.75 centers for #6 screws |
| ST-2-12**# / DST-2-12**# | 1.1 | 12.6 VCT @ 0.09 A | 6.3 V @ 0.18 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) | 0.17 (0.08) | - |
| ST-3-12*# / DST-3-12*# | 2.4 | 12.6 VCT @ 0.2 A | 6.3 V @ 0.4 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) | 0.25 (0.11) | - |
| ST-4-12*# / DST-4-12*# | 6 | 12.6 VCT @ 0.5 A | 6.3 V @ 1.0 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) | 0.44 (0.20) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-5-12*# / DST-5-12*# | 12 | 12.6 VCT @ 1.0 A | 6.3 V @ 2.0 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) | 0.70 (0.32) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-6-12 / DST-6-12 | 20 | 12.6 VCT @ 1.6 A | 6.3 V @ 3.2 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) | 0.80 (0.36) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-7-12 / DST-7-12 | 36 | 12.6 VCT @ 2.85 A | 6.3 V @ 5.7 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) | 1.1 (0.50) | 4 mounting holes on 2.18 x 1.75 centers for #6 screws |
| ST-2-16**# / DST-2-16**# | 1.1 | 16 VCT @ 0.07 A | 8 V @ 0.14 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) | 0.17 (0.08) | - |
| ST-3-16*# / DST-3-16*# | 2.4 | 16 VCT @ 0.15 A | 8 V @ 0.3 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) | 0.25 (0.11) | - |
| ST-4-16*# / DST-4-16*# | 6 | 16 VCT @ 0.4 A | 8 V @ 0.8 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) | 0.44 (0.20) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-5-16*# / DST-5-16*# | 12 | 16 VCT @ 0.8 A | 8 V @ 1.6 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) | 0.70 (0.32) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-6-16 / DST-6-16 | 20 | 16 VCT @ 1.25 A | 8 V @ 2.5 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) | 0.80 (0.36) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-7-16 / DST-7-16 | 36 | 16 VCT @ 2.25 A | 8 V @ 4.5 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) | 1.1 (0.50) | 4 mounting holes on 2.18 x 1.75 centers for #6 screws |
| ST-2-20**# / DST-2-20**# | 1.1 | 20 VCT @ 0.055 A | 10 V @ 0.11 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) | 0.17 (0.08) | - |
| ST-3-20*# / DST-3-20*# | 2.4 | 20 VCT @ 0.12 A | 10 V @ 0.24 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) | 0.25 (0.11) | - |
| ST-4-20*# / DST-4-20*# | 6 | 20 VCT @ 0.3 A | 10 V @ 0.6 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) | 0.44 (0.20) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-5-20*# / DST-5-20*# | 12 | 20 VCT @ 0.6 A | 10 V @ 1.2 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) | 0.70 (0.32) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-6-20 / DST-6-20 | 20 | 20 VCT @ 1.0 A | 10 V @ 2.0 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) | 0.80 (0.36) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-7-20 / DST-7-20 | 36 | 20 VCT @ 1.8 A | 10 V @ 3.6 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) | 1.1 (0.50) | 4 mounting holes on 2.18 x 1.75 centers for #6 screws |
| ST-2-24**# / DST-2-24**# | 1.1 | 24 VCT @ 0.045 A | 12 V @ 0.09 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) | 0.17 (0.08) | - |
| ST-3-24*# / DST-3-24*# | 2.4 | 24 VCT @ 0.1 A | 12 V @ 0.2 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) | 0.25 (0.11) | - |
| ST-4-24*# / DST-4-24*# | 6 | 24 VCT @ 0.25 A | 12 V @ 0.5 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) | 0.44 (0.20) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-5-24*# / DST-5-24*# | 12 | 24 VCT @ 0.5 A | 12 V @ 1.0 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) | 0.70 (0.32) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-6-24 / DST-6-24 | 20 | 24 VCT @ 0.8 A | 12 V @ 1.6 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) | 0.80 (0.36) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-7-24 / DST-7-24 | 36 | 24 VCT @ 1.5 A | 12 V @ 3.0 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) | 1.1 (0.50) | 4 mounting holes on 2.18 x 1.75 centers for #6 screws |
| ST-2-28 / DST-2-28 | 1.1 | 28 VCT @ 0.04 A | 14 V @ 0.08 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) | 0.17 (0.08) | - |
| ST-3-28 / DST-3-28 | 2.4 | 28 VCT @ 0.085 A | 14 V @ 0.17 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) | 0.25 (0.11) | - |
| ST-4-28 / DST-4-28 | 6 | 28 VCT @ 0.2 A | 14 V @ 0.4 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) | 0.44 (0.20) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-5-28 / DST-5-28 | 12 | 28 VCT @ 0.42 A | 14 V @ 0.84 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) | 0.70 (0.32) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-6-28 / DST-6-28 | 20 | 28 VCT @ 0.7 A | 14 V @ 1.4 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) | 0.80 (0.36) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-7-28 / DST-7-28 | 36 | 28 VCT @ 1.3 A | 14 V @ 2.6 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) | 1.1 (0.50) | 4 mounting holes on 2.18 x 1.75 centers for #6 screws |
| ST-2-36 / DST-2-36 | 1.1 | 36 VCT @ 0.03 A | 18 V @ 0.06 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) | 0.17 (0.08) | - |
| ST-3-36 / DST-3-36 | 2.4 | 36 VCT @ 0.065 A | 18 V @ 0.13 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) | 0.25 (0.11) | - |
| ST-4-36 / DST-4-36 | 6 | 36 VCT @ 0.17 A | 18 V @ 0.34 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) | 0.44 (0.20) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-5-36 / DST-5-36 | 12 | 36 VCT @ 0.35 A | 18 V @ 0.7 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) | 0.70 (0.32) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-6-36 / DST-6-36 | 20 | 36 VCT @ 0.55 A | 18 V @ 1.1 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) | 0.80 (0.36) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-7-36 / DST-7-36 | 36 | 36 VCT @ 1.0 A | 18 V @ 2.0 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) | 1.1 (0.50) | 4 mounting holes on 2.18 x 1.75 centers for #6 screws |
| ST-2-48 / DST-2-48 | 1.1 | 48 VCT @ 0.023 A | 24 V @ 0.046 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) | 0.17 (0.08) | - |
| ST-3-48 / DST-3-48 | 2.4 | 48 VCT @ 0.05 A | 24 V @ 0.1 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) | 0.25 (0.11) | - |
| ST-4-48 / DST-4-48 | 6 | 48 VCT @ 0.125 A | 24 V @ 0.25 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) | 0.44 (0.20) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-5-48 / DST-5-48 | 12 | 48 VCT @ 0.25 A | 24 V @ 0.5 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) | 0.70 (0.32) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-6-48 / DST-6-48 | 20 | 48 VCT @ 0.4 A | 24 V @ 0.8 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) | 0.80 (0.36) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-7-48 / DST-7-48 | 36 | 48 VCT @ 0.75 A | 24 V @ 1.5 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) | 1.1 (0.50) | 4 mounting holes on 2.18 x 1.75 centers for #6 screws |
| ST-2-56 / DST-2-56 | 1.1 | 56 VCT @ 0.02 A | 28 V @ 0.04 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) | 0.17 (0.08) | - |
| ST-3-56 / DST-3-56 | 2.4 | 56 VCT @ 0.045 A | 28 V @ 0.09 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) | 0.25 (0.11) | - |
| ST-4-56 / DST-4-56 | 6 | 56 VCT @ 0.11 A | 28 V @ 0.22 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) | 0.44 (0.20) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-5-56 / DST-5-56 | 12 | 56 VCT @ 0.22 A | 28 V @ 0.44 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) | 0.70 (0.32) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-6-56 / DST-6-56 | 20 | 56 VCT @ 0.35 A | 28 V @ 0.7 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) | 0.80 (0.36) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-7-56 / DST-7-56 | 36 | 56 VCT @ 0.65 A | 28 V @ 1.3 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) | 1.1 (0.50) | 4 mounting holes on 2.18 x 1.75 centers for #6 screws |
| ST-2-120 / DST-2-120 | 1.1 | 120 VCT @ 0.01 A | 60 V @ 0.02 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) | 0.17 (0.08) | - |
| ST-3-120 / DST-3-120 | 2.4 | 120 VCT @ 0.02 A | 60 V @ 0.04 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) | 0.25 (0.11) | - |
| ST-4-120 / DST-4-120 | 6 | 120 VCT @ 0.05 A | 60 V @ 0.1 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) | 0.44 (0.20) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-5-120 / DST-5-120 | 12 | 120 VCT @ 0.1 A | 60 V @ 0.2 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) | 0.70 (0.32) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-6-120 / DST-6-120 | 20 | 120 VCT @ 0.16 A | 60 V @ 0.32 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) | 0.80 (0.36) | Nylon 4-40 x 1.37 (4-40 x 34.9) |
| ST-7-120 / DST-7-120 | 36 | 120 VCT @ 0.3 A | 60 V @ 0.6 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) | 1.1 (0.50) | 4 mounting holes on 2.18 x 1.75 centers for #6 screws |
| General Specifications: 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 Recommended Secondary Fuse Values: (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 | ||||||||
2411272143_Bel-Fuse-ST-7-28_C17486307.pdf
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