Split Bobbin Dual Cavity Transformer with Rigid Pins Signal Series Featuring Bel Fuse DST-6-56 Model
Product Overview
The Signal ST and DST Series Split/Tran Specialty Purpose & Class 2 Transformers are designed for printed circuit board mounting. They feature a split bobbin construction with dual cavities, providing superior isolation and low capacitive coupling. The rigid pin construction ensures easier board insertion and enhanced reliability. These transformers are suitable for a wide range of power applications from 1.1 VA to 36 VA.
Product Attributes
- Brand: Signal Transformer (belfuse.com/signal)
- Series: ST / DST Series
- 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
- Customization: Custom versions available upon request.
Technical Specifications
| Part Number | Secondary RMS Rating (Series) | Secondary RMS Rating (Parallel) | Power (VA) | Dielectric Strength (Vrms Hipot) | Primary Options | Frequency (Hz) | Mounting Type | 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 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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*# | 10 VCT @ 0.25 A | 5 V @ 0.5 A | 2.4 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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*# | 10 VCT @ 0.6 A | 5 V @ 1.2 A | 6 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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*# | 10 VCT @ 1.2 A | 5 V @ 2.4 A | 12 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 10 VCT @ 2.0 A | 5 V @ 4.0 A | 20 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 10 VCT @ 3.6 A | 5 V @ 7.2 A | 36 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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**# | 12.6 VCT @ 0.09 A | 6.3 V @ 0.18 A | 1.1 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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*# | 12.6 VCT @ 0.2 A | 6.3 V @ 0.4 A | 2.4 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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*# | 12.6 VCT @ 0.5 A | 6.3 V @ 1.0 A | 6 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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*# | 12.6 VCT @ 1.0 A | 6.3 V @ 2.0 A | 12 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 12.6 VCT @ 1.6 A | 6.3 V @ 3.2 A | 20 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 12.6 VCT @ 2.85 A | 6.3 V @ 5.7 A | 36 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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**# | 16 VCT @ 0.07 A | 8 V @ 0.14 A | 1.1 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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*# | 16 VCT @ 0.15 A | 8 V @ 0.3 A | 2.4 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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*# | 16 VCT @ 0.4 A | 8 V @ 0.8 A | 6 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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*# | 16 VCT @ 0.8 A | 8 V @ 1.6 A | 12 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 16 VCT @ 1.25 A | 8 V @ 2.5 A | 20 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 16 VCT @ 2.25 A | 8 V @ 4.5 A | 36 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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**# | 20 VCT @ 0.055 A | 10 V @ 0.11 A | 1.1 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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*# | 20 VCT @ 0.12 A | 10 V @ 0.24 A | 2.4 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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*# | 20 VCT @ 0.3 A | 10 V @ 0.6 A | 6 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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*# | 20 VCT @ 0.6 A | 10 V @ 1.2 A | 12 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 VCT @ 1.0 A | 10 V @ 2.0 A | 20 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 20 VCT @ 1.8 A | 10 V @ 3.6 A | 36 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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**# | 24 VCT @ 0.045 A | 12 V @ 0.09 A | 1.1 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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*# | 24 VCT @ 0.1 A | 12 V @ 0.2 A | 2.4 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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*# | 24 VCT @ 0.25 A | 12 V @ 0.5 A | 6 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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*# | 24 VCT @ 0.5 A | 12 V @ 1.0 A | 12 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 24 VCT @ 0.8 A | 12 V @ 1.6 A | 20 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 24 VCT @ 1.5 A | 12 V @ 3.0 A | 36 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 28 VCT @ 0.04 A | 14 V @ 0.08 A | 1.1 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 28 VCT @ 0.085 A | 14 V @ 0.17 A | 2.4 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 28 VCT @ 0.2 A | 14 V @ 0.4 A | 6 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 28 VCT @ 0.42 A | 14 V @ 0.84 A | 12 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 28 VCT @ 0.7 A | 14 V @ 1.4 A | 20 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 28 VCT @ 1.3 A | 14 V @ 2.6 A | 36 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 36 VCT @ 0.03 A | 18 V @ 0.06 A | 1.1 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 36 VCT @ 0.065 A | 18 V @ 0.13 A | 2.4 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 36 VCT @ 0.17 A | 18 V @ 0.34 A | 6 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 36 VCT @ 0.35 A | 18 V @ 0.7 A | 12 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 36 VCT @ 0.55 A | 18 V @ 1.1 A | 20 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 VCT @ 1.0 A | 18 V @ 2.0 A | 36 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 48 VCT @ 0.023 A | 24 V @ 0.046 A | 1.1 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 48 VCT @ 0.05 A | 24 V @ 0.1 A | 2.4 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 48 VCT @ 0.125 A | 24 V @ 0.25 A | 6 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 48 VCT @ 0.25 A | 24 V @ 0.5 A | 12 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 48 VCT @ 0.4 A | 24 V @ 0.8 A | 20 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 48 VCT @ 0.75 A | 24 V @ 1.5 A | 36 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 56 VCT @ 0.02 A | 28 V @ 0.04 A | 1.1 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 56 VCT @ 0.045 A | 28 V @ 0.09 A | 2.4 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 56 VCT @ 0.11 A | 28 V @ 0.22 A | 6 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 56 VCT @ 0.22 A | 28 V @ 0.44 A | 12 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 56 VCT @ 0.35 A | 28 V @ 0.7 A | 20 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 56 VCT @ 0.65 A | 28 V @ 1.3 A | 36 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 120 VCT @ 0.01 A | 60 V @ 0.02 A | 1.1 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 120 VCT @ 0.02 A | 60 V @ 0.04 A | 2.4 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 120 VCT @ 0.05 A | 60 V @ 0.1 A | 6 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 120 VCT @ 0.1 A | 60 V @ 0.2 A | 12 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 120 VCT @ 0.16 A | 60 V @ 0.32 A | 20 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 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 | 120 VCT @ 0.3 A | 60 V @ 0.6 A | 36 | 2500 | Single 115 V / Dual 115/230 V | 50/60 | 6 Pin (ST) / 8 Pin (DST) | 2.62 x 2.18 x 1.59 (66.7 x 55.5 x 40.4) | 1.1 (0.50) |
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 Hardware: See Accessories datasheet for mounting screw information. 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.
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