<
>
Specifications
Secondary Winding:
2
Isolation Voltage(Vrms):
2.5kV
Primary Winding(s):
1
Secondary Side Voltage:
14V;28V
Output Current:
400mA;200mA
Primary Side Voltage:
115V
Mfr. Part #:
ST-4-28
Package:
Through Hole-6P,41.3x33.3mm
Key Attributes
Model Number:
ST-4-28
Product Description
Signal ST / DST Series Split Bobbin Transformers
Product Overview
The Signal ST and DST Series Split Bobbin Transformers are specialty purpose and Class 2 transformers designed for high isolation and low capacitive coupling. Utilizing a dual cavity platform, these transformers offer rigid pin construction for enhanced board insertion reliability. They are suitable for a wide range of power applications from 1.1 VA to 36 VA, featuring Class F (155C) insulation systems and meeting stringent agency certifications.
Product Attributes
- Brand: Signal Transformer
- Series: ST / DST Series Split/Tran
- Construction: Split Bobbin with Dual Cavity Platform
- Insulation System: Class F, 155 C
- RoHS Compliant: Yes
- Agency Certifications: UL 1446 Class F, UL Recognized 506 / UL 5085-1, 2, CSA certified to C22.2 #66.1, cCSAus certified to C22.2 #66.3 / UL 5085-3, UL Recognized UL5085-3 Inherently Limited.
- Custom Versions: Available upon request.
Technical Specifications
| Part Number | Secondary RMS Rating (Series) | Secondary RMS Rating (Parallel) | Power (VA) | Primary Options | Pin Configuration | Dimensions (L x W x H) Inches (mm) | Weight lbs (kg) |
|---|---|---|---|---|---|---|---|
| ST-2-10**# / DST-2-10**# | 10 VCT @ 0.11 A | 5 V @ 0.22 A | 1.1 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) | 0.17 (0.08) |
| ST-3-10*# / DST-3-10*# | 10 VCT @ 0.25 A | 5 V @ 0.5 A | 2.4 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) | 0.25 (0.11) |
| ST-4-10*# / DST-4-10*# | 10 VCT @ 0.6 A | 5 V @ 1.2 A | 6 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) | 0.44 (0.20) |
| ST-5-10*# / DST-5-10*# | 10 VCT @ 1.2 A | 5 V @ 2.4 A | 12 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) | 0.70 (0.32) |
| ST-6-10 / DST-6-10 | 10 VCT @ 2.0 A | 5 V @ 4.0 A | 20 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) | 0.80 (0.36) |
| ST-7-10 / DST-7-10 | 10 VCT @ 3.6 A | 5 V @ 7.2 A | 36 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) | 1.1 (0.50) |
| ST-2-12**# / DST-2-12**# | 12.6 VCT @ 0.09 A | 6.3 V @ 0.18 A | 1.1 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) | 0.17 (0.08) |
| ST-3-12*# / DST-3-12*# | 12.6 VCT @ 0.2 A | 6.3 V @ 0.4 A | 2.4 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) | 0.25 (0.11) |
| ST-4-12*# / DST-4-12*# | 12.6 VCT @ 0.5 A | 6.3 V @ 1.0 A | 6 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) | 0.44 (0.20) |
| ST-5-12*# / DST-5-12*# | 12.6 VCT @ 1.0 A | 6.3 V @ 2.0 A | 12 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) | 0.70 (0.32) |
| ST-6-12 / DST-6-12 | 12.6 VCT @ 1.6 A | 6.3 V @ 3.2 A | 20 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) | 0.80 (0.36) |
| ST-7-12 / DST-7-12 | 12.6 VCT @ 2.85 A | 6.3 V @ 5.7 A | 36 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) | 1.1 (0.50) |
| ST-2-16**# / DST-2-16**# | 16 VCT @ 0.07 A | 8 V @ 0.14 A | 1.1 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) | 0.17 (0.08) |
| ST-3-16*# / DST-3-16*# | 16 VCT @ 0.15 A | 8 V @ 0.3 A | 2.4 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) | 0.25 (0.11) |
| ST-4-16*# / DST-4-16*# | 16 VCT @ 0.4 A | 8 V @ 0.8 A | 6 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) | 0.44 (0.20) |
| ST-5-16*# / DST-5-16*# | 16 VCT @ 0.8 A | 8 V @ 1.6 A | 12 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) | 0.70 (0.32) |
| ST-6-16 / DST-6-16 | 16 VCT @ 1.25 A | 8 V @ 2.5 A | 20 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) | 0.80 (0.36) |
| ST-7-16 / DST-7-16 | 16 VCT @ 2.25 A | 8 V @ 4.5 A | 36 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) | 1.1 (0.50) |
| ST-2-20**# / DST-2-20**# | 20 VCT @ 0.055 A | 10 V @ 0.11 A | 1.1 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) | 0.17 (0.08) |
| ST-3-20*# / DST-3-20*# | 20 VCT @ 0.12 A | 10 V @ 0.24 A | 2.4 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) | 0.25 (0.11) |
| ST-4-20*# / DST-4-20*# | 20 VCT @ 0.3 A | 10 V @ 0.6 A | 6 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) | 0.44 (0.20) |
| ST-5-20*# / DST-5-20*# | 20 VCT @ 0.6 A | 10 V @ 1.2 A | 12 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) | 0.70 (0.32) |
| ST-6-20 / DST-6-20 | 20 VCT @ 1.0 A | 10 V @ 2.0 A | 20 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) | 0.80 (0.36) |
| ST-7-20 / DST-7-20 | 20 VCT @ 1.8 A | 10 V @ 3.6 A | 36 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) | 1.1 (0.50) |
| ST-2-24**# / DST-2-24**# | 24 VCT @ 0.045 A | 12 V @ 0.09 A | 1.1 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) | 0.17 (0.08) |
| ST-3-24*# / DST-3-24*# | 24 VCT @ 0.1 A | 12 V @ 0.2 A | 2.4 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) | 0.25 (0.11) |
| ST-4-24*# / DST-4-24*# | 24 VCT @ 0.25 A | 12 V @ 0.5 A | 6 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) | 0.44 (0.20) |
| ST-5-24*# / DST-5-24*# | 24 VCT @ 0.5 A | 12 V @ 1.0 A | 12 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) | 0.70 (0.32) |
| ST-6-24 / DST-6-24 | 24 VCT @ 0.8 A | 12 V @ 1.6 A | 20 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) | 0.80 (0.36) |
| ST-7-24 / DST-7-24 | 24 VCT @ 1.5 A | 12 V @ 3.0 A | 36 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) | 1.1 (0.50) |
| ST-2-28 / DST-2-28 | 28 VCT @ 0.04 A | 14 V @ 0.08 A | 1.1 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) | 0.17 (0.08) |
| ST-3-28 / DST-3-28 | 28 VCT @ 0.085 A | 14 V @ 0.17 A | 2.4 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) | 0.25 (0.11) |
| ST-4-28 / DST-4-28 | 28 VCT @ 0.2 A | 14 V @ 0.4 A | 6 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) | 0.44 (0.20) |
| ST-5-28 / DST-5-28 | 28 VCT @ 0.42 A | 14 V @ 0.84 A | 12 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) | 0.70 (0.32) |
| ST-6-28 / DST-6-28 | 28 VCT @ 0.7 A | 14 V @ 1.4 A | 20 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) | 0.80 (0.36) |
| ST-7-28 / DST-7-28 | 28 VCT @ 1.3 A | 14 V @ 2.6 A | 36 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) | 1.1 (0.50) |
| ST-2-36 / DST-2-36 | 36 VCT @ 0.03 A | 18 V @ 0.06 A | 1.1 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) | 0.17 (0.08) |
| ST-3-36 / DST-3-36 | 36 VCT @ 0.065 A | 18 V @ 0.13 A | 2.4 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) | 0.25 (0.11) |
| ST-4-36 / DST-4-36 | 36 VCT @ 0.17 A | 18 V @ 0.34 A | 6 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) | 0.44 (0.20) |
| ST-5-36 / DST-5-36 | 36 VCT @ 0.35 A | 18 V @ 0.7 A | 12 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) | 0.70 (0.32) |
| ST-6-36 / DST-6-36 | 36 VCT @ 0.55 A | 18 V @ 1.1 A | 20 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) | 0.80 (0.36) |
| ST-7-36 / DST-7-36 | 36 VCT @ 1.0 A | 18 V @ 2.0 A | 36 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) | 1.1 (0.50) |
| ST-2-48 / DST-2-48 | 48 VCT @ 0.023 A | 24 V @ 0.046 A | 1.1 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) | 0.17 (0.08) |
| ST-3-48 / DST-3-48 | 48 VCT @ 0.05 A | 24 V @ 0.1 A | 2.4 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) | 0.25 (0.11) |
| ST-4-48 / DST-4-48 | 48 VCT @ 0.125 A | 24 V @ 0.25 A | 6 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) | 0.44 (0.20) |
| ST-5-48 / DST-5-48 | 48 VCT @ 0.25 A | 24 V @ 0.5 A | 12 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) | 0.70 (0.32) |
| ST-6-48 / DST-6-48 | 48 VCT @ 0.4 A | 24 V @ 0.8 A | 20 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) | 0.80 (0.36) |
| ST-7-48 / DST-7-48 | 48 VCT @ 0.75 A | 24 V @ 1.5 A | 36 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) | 1.1 (0.50) |
| ST-2-56 / DST-2-56 | 56 VCT @ 0.02 A | 28 V @ 0.04 A | 1.1 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) | 0.17 (0.08) |
| ST-3-56 / DST-3-56 | 56 VCT @ 0.045 A | 28 V @ 0.09 A | 2.4 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) | 0.25 (0.11) |
| ST-4-56 / DST-4-56 | 56 VCT @ 0.11 A | 28 V @ 0.22 A | 6 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) | 0.44 (0.20) |
| ST-5-56 / DST-5-56 | 56 VCT @ 0.22 A | 28 V @ 0.44 A | 12 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) | 0.70 (0.32) |
| ST-6-56 / DST-6-56 | 56 VCT @ 0.35 A | 28 V @ 0.7 A | 20 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) | 0.80 (0.36) |
| ST-7-56 / DST-7-56 | 56 VCT @ 0.65 A | 28 V @ 1.3 A | 36 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) | 1.1 (0.50) |
| ST-2-120 / DST-2-120 | 120 VCT @ 0.01 A | 60 V @ 0.02 A | 1.1 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) | 0.17 (0.08) |
| ST-3-120 / DST-3-120 | 120 VCT @ 0.02 A | 60 V @ 0.04 A | 2.4 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) | 0.25 (0.11) |
| ST-4-120 / DST-4-120 | 120 VCT @ 0.05 A | 60 V @ 0.1 A | 6 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) | 0.44 (0.20) |
| ST-5-120 / DST-5-120 | 120 VCT @ 0.1 A | 60 V @ 0.2 A | 12 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) | 0.70 (0.32) |
| ST-6-120 / DST-6-120 | 120 VCT @ 0.16 A | 60 V @ 0.32 A | 20 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) | 0.80 (0.36) |
| ST-7-120 / DST-7-120 | 120 VCT @ 0.3 A | 60 V @ 0.6 A | 36 | Single 115 V / Dual 115/230 V | 6 Pin (ST) / 8 Pin (DST) | 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) | 1.1 (0.50) |
| General Specifications: Dielectric Strength - 2500 Vrms Hipot; Primary Voltage - 115 V or 115/230 V, 50/60 Hz; Electrostatic Shield - Not necessary due to split bobbin construction. Mounting Hardware - see chart. Size 7 has 4 mounting holes on 2.18 x 1.75 centers for #6 screws. | |||||||
Note: Part numbers marked with (*) or (**) or (#) indicate Class 2 compliance. See CSA certification details for Inherently Limited and Non Inherently Limited classifications.
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.
Mounting screws and nuts (ST-MS, ST-MN) are available from Signal. Refer to Accessories datasheet for mounting screw information.
2411272143_Bel-Fuse-ST-4-28_C17216774.pdf
Request A Quote
Please Use Our Online Inquiry Contact Form Below If You Have Any Questions, Our Team Will Get Back To You As Soon As Possible
