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Specifications
Secondary Winding:
2
Isolation Voltage(Vrms):
2.5kV
Primary Winding(s):
2
Secondary Side Voltage:
14V;28V
Output Current:
80mA;40mA
Primary Side Voltage:
115V;230V
Mfr. Part #:
DST-2-28
Package:
Through Hole-8P,34.9x28.6mm
Key Attributes
Model Number:
DST-2-28
Product Description
Product Overview
The Signal ST/DST Series Split/Tran Specialty Purpose & Class 2 Transformers are designed for printed circuit board mounting. Utilizing a dual cavity platform, these transformers offer superior isolation and low capacitive coupling. Their rigid pin construction ensures easier board insertion and enhanced reliability, making them suitable for a wide range of applications requiring high isolation and precise signal transmission. They are available in various power ratings from 1.1 VA to 36 VA and meet stringent agency certifications.
Product Attributes
- Brand: Signal Transformer (Bel Fuse)
- Series: ST / DST Series Split/Tran
- Construction: Split Bobbin with Dual Cavity Platform
- Pin Construction: Rigid
- Insulation System: Class F, 155 C
- RoHS Compliant: Yes
- Agency Certifications: UL 1446, UL Recognized 506 / UL 5085-1, 2, CSA certified to C22.2 #66.1, cCSAus certified to C22.2 #66.3 / UL 5085-3
- Class 2 Marking: Indicated by (*), (**), or (#)
Technical Specifications
| Model | Power (VA) | Secondary RMS Rating (Series) | Secondary RMS Rating (Parallel) | Primary Voltage (V) | Frequency (Hz) | Dielectric Strength (Vrms Hipot) | Insulation System | Dimensions (L x W x H) Inches (mm) | Weight lbs (kg) |
|---|---|---|---|---|---|---|---|---|---|
| ST-2-10**# / DST-2-10**# | 1.1 | 10 VCT @ 0.11 A | 5 V @ 0.22 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.37 x 1.12 x 0.97 (34.9 x 28.6 x 24.6) | 0.17 (0.08) |
| ST-3-10*# / DST-3-10*# | 2.4 | 10 VCT @ 0.25 A | 5 V @ 0.5 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.37 x 1.12 x 1.21 (34.9 x 28.6 x 30.8) | 0.25 (0.11) |
| ST-4-10*# / DST-4-10*# | 6 | 10 VCT @ 0.6 A | 5 V @ 1.2 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.62 x 1.31 x 1.31 (41.3 x 33.3 x 33.3) | 0.44 (0.20) |
| ST-5-10*# / DST-5-10*# | 12 | 10 VCT @ 1.2 A | 5 V @ 2.4 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.91 x 1.59 x 1.45 (48.4 x 40.4 x 36.9) | 0.70 (0.32) |
| ST-6-10 / DST-6-10 | 20 | 10 VCT @ 2.0 A | 5 V @ 4.0 A | 115 V | 50/60 | 2500 | Class F, 155 C | 2.25 x 1.88 x 1.45 (57.2 x 47.8 x 36.9) | 0.80 (0.36) |
| ST-7-10 / DST-7-10 | 36 | 10 VCT @ 3.6 A | 5 V @ 7.2 A | 115 V | 50/60 | 2500 | Class F, 155 C | 2.62 x 2.18 x 1.59 (66.7 x 55.5 x 40.4) | 1.1 (0.50) |
| ST-2-12**# / DST-2-12**# | 1.1 | 12.6 VCT @ 0.09 A | 6.3 V @ 0.18 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.37 x 1.12 x 0.97 (34.9 x 28.6 x 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 | 115 V | 50/60 | 2500 | Class F, 155 C | 1.37 x 1.12 x 1.21 (34.9 x 28.6 x 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 | 115 V | 50/60 | 2500 | Class F, 155 C | 1.62 x 1.31 x 1.31 (41.3 x 33.3 x 33.3) | 0.44 (0.20) |
| ST-5-12*# / DST-5-12*# | 12 | 12.6 VCT @ 1.0 A | 6.3 V @ 2.0 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.91 x 1.59 x 1.45 (48.4 x 40.4 x 36.9) | 0.70 (0.32) |
| ST-6-12 / DST-6-12 | 20 | 12.6 VCT @ 1.6 A | 6.3 V @ 3.2 A | 115 V | 50/60 | 2500 | Class F, 155 C | 2.25 x 1.88 x 1.45 (57.2 x 47.8 x 36.9) | 0.80 (0.36) |
| ST-7-12 / DST-7-12 | 36 | 12.6 VCT @ 2.85 A | 6.3 V @ 5.7 A | 115 V | 50/60 | 2500 | Class F, 155 C | 2.62 x 2.18 x 1.59 (66.7 x 55.5 x 40.4) | 1.1 (0.50) |
| ST-2-16**# / DST-2-16**# | 1.1 | 16 VCT @ 0.07 A | 8 V @ 0.14 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.37 x 1.12 x 0.97 (34.9 x 28.6 x 24.6) | 0.17 (0.08) |
| ST-3-16*# / DST-3-16*# | 2.4 | 16 VCT @ 0.15 A | 8 V @ 0.3 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.37 x 1.12 x 1.21 (34.9 x 28.6 x 30.8) | 0.25 (0.11) |
| ST-4-16*# / DST-4-16*# | 6 | 16 VCT @ 0.4 A | 8 V @ 0.8 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.62 x 1.31 x 1.31 (41.3 x 33.3 x 33.3) | 0.44 (0.20) |
| ST-5-16*# / DST-5-16*# | 12 | 16 VCT @ 0.8 A | 8 V @ 1.6 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.91 x 1.59 x 1.45 (48.4 x 40.4 x 36.9) | 0.70 (0.32) |
| ST-6-16 / DST-6-16 | 20 | 16 VCT @ 1.25 A | 8 V @ 2.5 A | 115 V | 50/60 | 2500 | Class F, 155 C | 2.25 x 1.88 x 1.45 (57.2 x 47.8 x 36.9) | 0.80 (0.36) |
| ST-7-16 / DST-7-16 | 36 | 16 VCT @ 2.25 A | 8 V @ 4.5 A | 115 V | 50/60 | 2500 | Class F, 155 C | 2.62 x 2.18 x 1.59 (66.7 x 55.5 x 40.4) | 1.1 (0.50) |
| ST-2-20**# / DST-2-20**# | 1.1 | 20 VCT @ 0.055 A | 10 V @ 0.11 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.37 x 1.12 x 0.97 (34.9 x 28.6 x 24.6) | 0.17 (0.08) |
| ST-3-20*# / DST-3-20*# | 2.4 | 20 VCT @ 0.12 A | 10 V @ 0.24 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.37 x 1.12 x 1.21 (34.9 x 28.6 x 30.8) | 0.25 (0.11) |
| ST-4-20*# / DST-4-20*# | 6 | 20 VCT @ 0.3 A | 10 V @ 0.6 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.62 x 1.31 x 1.31 (41.3 x 33.3 x 33.3) | 0.44 (0.20) |
| ST-5-20*# / DST-5-20*# | 12 | 20 VCT @ 0.6 A | 10 V @ 1.2 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.91 x 1.59 x 1.45 (48.4 x 40.4 x 36.9) | 0.70 (0.32) |
| ST-6-20 / DST-6-20 | 20 | 20 VCT @ 1.0 A | 10 V @ 2.0 A | 115 V | 50/60 | 2500 | Class F, 155 C | 2.25 x 1.88 x 1.45 (57.2 x 47.8 x 36.9) | 0.80 (0.36) |
| ST-7-20 / DST-7-20 | 36 | 20 VCT @ 1.8 A | 10 V @ 3.6 A | 115 V | 50/60 | 2500 | Class F, 155 C | 2.62 x 2.18 x 1.59 (66.7 x 55.5 x 40.4) | 1.1 (0.50) |
| ST-2-24**# / DST-2-24**# | 1.1 | 24 VCT @ 0.045 A | 12 V @ 0.09 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.37 x 1.12 x 0.97 (34.9 x 28.6 x 24.6) | 0.17 (0.08) |
| ST-3-24*# / DST-3-24*# | 2.4 | 24 VCT @ 0.1 A | 12 V @ 0.2 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.37 x 1.12 x 1.21 (34.9 x 28.6 x 30.8) | 0.25 (0.11) |
| ST-4-24*# / DST-4-24*# | 6 | 24 VCT @ 0.25 A | 12 V @ 0.5 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.62 x 1.31 x 1.31 (41.3 x 33.3 x 33.3) | 0.44 (0.20) |
| ST-5-24*# / DST-5-24*# | 12 | 24 VCT @ 0.5 A | 12 V @ 1.0 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.91 x 1.59 x 1.45 (48.4 x 40.4 x 36.9) | 0.70 (0.32) |
| ST-6-24 / DST-6-24 | 20 | 24 VCT @ 0.8 A | 12 V @ 1.6 A | 115 V | 50/60 | 2500 | Class F, 155 C | 2.25 x 1.88 x 1.45 (57.2 x 47.8 x 36.9) | 0.80 (0.36) |
| ST-7-24 / DST-7-24 | 36 | 24 VCT @ 1.5 A | 12 V @ 3.0 A | 115 V | 50/60 | 2500 | Class F, 155 C | 2.62 x 2.18 x 1.59 (66.7 x 55.5 x 40.4) | 1.1 (0.50) |
| ST-2-28 / DST-2-28 | 1.1 | 28 VCT @ 0.04 A | 14 V @ 0.08 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.37 x 1.12 x 0.97 (34.9 x 28.6 x 24.6) | 0.17 (0.08) |
| ST-3-28 / DST-3-28 | 2.4 | 28 VCT @ 0.085 A | 14 V @ 0.17 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.37 x 1.12 x 1.21 (34.9 x 28.6 x 30.8) | 0.25 (0.11) |
| ST-4-28 / DST-4-28 | 6 | 28 VCT @ 0.2 A | 14 V @ 0.4 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.62 x 1.31 x 1.31 (41.3 x 33.3 x 33.3) | 0.44 (0.20) |
| ST-5-28 / DST-5-28 | 12 | 28 VCT @ 0.42 A | 14 V @ 0.84 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.91 x 1.59 x 1.45 (48.4 x 40.4 x 36.9) | 0.70 (0.32) |
| ST-6-28 / DST-6-28 | 20 | 28 VCT @ 0.7 A | 14 V @ 1.4 A | 115 V | 50/60 | 2500 | Class F, 155 C | 2.25 x 1.88 x 1.45 (57.2 x 47.8 x 36.9) | 0.80 (0.36) |
| ST-7-28 / DST-7-28 | 36 | 28 VCT @ 1.3 A | 14 V @ 2.6 A | 115 V | 50/60 | 2500 | Class F, 155 C | 2.62 x 2.18 x 1.59 (66.7 x 55.5 x 40.4) | 1.1 (0.50) |
| ST-2-36 / DST-2-36 | 1.1 | 36 VCT @ 0.03 A | 18 V @ 0.06 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.37 x 1.12 x 0.97 (34.9 x 28.6 x 24.6) | 0.17 (0.08) |
| ST-3-36 / DST-3-36 | 2.4 | 36 VCT @ 0.065 A | 18 V @ 0.13 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.37 x 1.12 x 1.21 (34.9 x 28.6 x 30.8) | 0.25 (0.11) |
| ST-4-36 / DST-4-36 | 6 | 36 VCT @ 0.17 A | 18 V @ 0.34 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.62 x 1.31 x 1.31 (41.3 x 33.3 x 33.3) | 0.44 (0.20) |
| ST-5-36 / DST-5-36 | 12 | 36 VCT @ 0.35 A | 18 V @ 0.7 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.91 x 1.59 x 1.45 (48.4 x 40.4 x 36.9) | 0.70 (0.32) |
| ST-6-36 / DST-6-36 | 20 | 36 VCT @ 0.55 A | 18 V @ 1.1 A | 115 V | 50/60 | 2500 | Class F, 155 C | 2.25 x 1.88 x 1.45 (57.2 x 47.8 x 36.9) | 0.80 (0.36) |
| ST-7-36 / DST-7-36 | 36 | 36 VCT @ 1.0 A | 18 V @ 2.0 A | 115 V | 50/60 | 2500 | Class F, 155 C | 2.62 x 2.18 x 1.59 (66.7 x 55.5 x 40.4) | 1.1 (0.50) |
| ST-2-48 / DST-2-48 | 1.1 | 48 VCT @ 0.023 A | 24 V @ 0.046 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.37 x 1.12 x 0.97 (34.9 x 28.6 x 24.6) | 0.17 (0.08) |
| ST-3-48 / DST-3-48 | 2.4 | 48 VCT @ 0.05 A | 24 V @ 0.1 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.37 x 1.12 x 1.21 (34.9 x 28.6 x 30.8) | 0.25 (0.11) |
| ST-4-48 / DST-4-48 | 6 | 48 VCT @ 0.125 A | 24 V @ 0.25 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.62 x 1.31 x 1.31 (41.3 x 33.3 x 33.3) | 0.44 (0.20) |
| ST-5-48 / DST-5-48 | 12 | 48 VCT @ 0.25 A | 24 V @ 0.5 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.91 x 1.59 x 1.45 (48.4 x 40.4 x 36.9) | 0.70 (0.32) |
| ST-6-48 / DST-6-48 | 20 | 48 VCT @ 0.4 A | 24 V @ 0.8 A | 115 V | 50/60 | 2500 | Class F, 155 C | 2.25 x 1.88 x 1.45 (57.2 x 47.8 x 36.9) | 0.80 (0.36) |
| ST-7-48 / DST-7-48 | 36 | 48 VCT @ 0.75 A | 24 V @ 1.5 A | 115 V | 50/60 | 2500 | Class F, 155 C | 2.62 x 2.18 x 1.59 (66.7 x 55.5 x 40.4) | 1.1 (0.50) |
| ST-2-56 / DST-2-56 | 1.1 | 56 VCT @ 0.02 A | 28 V @ 0.04 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.37 x 1.12 x 0.97 (34.9 x 28.6 x 24.6) | 0.17 (0.08) |
| ST-3-56 / DST-3-56 | 2.4 | 56 VCT @ 0.045 A | 28 V @ 0.09 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.37 x 1.12 x 1.21 (34.9 x 28.6 x 30.8) | 0.25 (0.11) |
| ST-4-56 / DST-4-56 | 6 | 56 VCT @ 0.11 A | 28 V @ 0.22 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.62 x 1.31 x 1.31 (41.3 x 33.3 x 33.3) | 0.44 (0.20) |
| ST-5-56 / DST-5-56 | 12 | 56 VCT @ 0.22 A | 28 V @ 0.44 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.91 x 1.59 x 1.45 (48.4 x 40.4 x 36.9) | 0.70 (0.32) |
| ST-6-56 / DST-6-56 | 20 | 56 VCT @ 0.35 A | 28 V @ 0.7 A | 115 V | 50/60 | 2500 | Class F, 155 C | 2.25 x 1.88 x 1.45 (57.2 x 47.8 x 36.9) | 0.80 (0.36) |
| ST-7-56 / DST-7-56 | 36 | 56 VCT @ 0.65A | 28 V @ 1.3 A | 115 V | 50/60 | 2500 | Class F, 155 C | 2.62 x 2.18 x 1.59 (66.7 x 55.5 x 40.4) | 1.1 (0.50) |
| ST-2-120 / DST-2-120 | 1.1 | 120 VCT @ 0.01 A | 60 V @ 0.02 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.37 x 1.12 x 0.97 (34.9 x 28.6 x 24.6) | 0.17 (0.08) |
| ST-3-120 / DST-3-120 | 2.4 | 120 VCT @ 0.02 A | 60 V @ 0.04 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.37 x 1.12 x 1.21 (34.9 x 28.6 x 30.8) | 0.25 (0.11) |
| ST-4-120 / DST-4-120 | 6 | 120 VCT @ 0.05 A | 60 V @ 0.1 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.62 x 1.31 x 1.31 (41.3 x 33.3 x 33.3) | 0.44 (0.20) |
| ST-5-120 / DST-5-120 | 12 | 120 VCT @ 0.1 A | 60 V @ 0.2 A | 115 V | 50/60 | 2500 | Class F, 155 C | 1.91 x 1.59 x 1.45 (48.4 x 40.4 x 36.9) | 0.70 (0.32) |
| ST-6-120 / DST-6-120 | 20 | 120 VCT @ 0.16 A | 60 V @ 0.32 A | 115 V | 50/60 | 2500 | Class F, 155 C | 2.25 x 1.88 x 1.45 (57.2 x 47.8 x 36.9) | 0.80 (0.36) |
| ST-7-120 / DST-7-120 | 36 | 120 VCT @ 0.3 A | 60 V @ 0.6 A | 115 V | 50/60 | 2500 | Class F, 155 C | 2.62 x 2.18 x 1.59 (66.7 x 55.5 x 40.4) | 1.1 (0.50) |
Note: Recommended secondary fuse values are provided in the original datasheet, referenced by numbers in parentheses next to the secondary ratings (e.g., (1), (2), etc.). Mounting hardware specifications are available in the Accessories datasheet.
Primary Options: Single or dual primaries, 115 V or 115/230 V, 50/60 Hz.
Secondary Options: Series or parallel configurations.
Electrostatic Shield: Not necessary due to split bobbin construction.
Mounting Hardware: See chart for details. Size 7 has 4 mounting holes on 2.18 x 1.75 centers for #6 screws. Optional mounting screw (ST-MS) and nut (ST-MN) available from Signal.
2411272143_Bel-Fuse-DST-2-28_C17390727.pdf
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