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Specifications
Secondary Winding:
2
Isolation Voltage(Vrms):
2.5kV
Primary Winding(s):
1
Secondary Side Voltage:
14V;28V
Output Current:
1.4A;700mA
Primary Side Voltage:
115V
Mfr. Part #:
ST-6-28
Package:
Through Hole-6P,57.2x47.6mm
Key Attributes
Model Number:
ST-6-28
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 that provides superior isolation and low capacitive coupling. These transformers feature rigid pin construction for easier board insertion and enhanced reliability. They are suitable for a wide range of power applications from 1.1 VA to 36 VA, offering dielectric strength of 2500 Vrms Hipot. Available in single or dual primary configurations (115 V or 115/230 V, 50/60 Hz) with series or parallel secondary options, these transformers meet Class F insulation system standards (155C) and are RoHS compliant. Agency certifications include UL and CSA recognition.
Product Attributes
- Brand: Signal Transformer (belfuse.com/signal)
- Series: ST / DST Split/Tran
- Construction: Split Bobbin with Dual Cavity Platform
- Pin Construction: Rigid
- Insulation System: Class F, 155C
- RoHS Compliant: Yes
- 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, UL Recognized UL5085-3 (Inherently Limited)
Technical Specifications
| Model | VA Rating | Secondary RMS Rating (Series) | Secondary RMS Rating (Parallel) | Primary Configuration | Pin Configuration | Dielectric Strength | Insulation System | Weight (lbs/kg) |
|---|---|---|---|---|---|---|---|---|
| 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 | 2500 Vrms Hipot | Class F (155C) | 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 | 2500 Vrms Hipot | Class F (155C) | 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 | 2500 Vrms Hipot | Class F (155C) | 0.44 (0.20) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 0.70 (0.32) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 0.80 (0.36) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 1.1 (0.50) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 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 | 2500 Vrms Hipot | Class F (155C) | 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 | 2500 Vrms Hipot | Class F (155C) | 0.44 (0.20) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 0.70 (0.32) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 0.80 (0.36) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 1.1 (0.50) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 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 | 2500 Vrms Hipot | Class F (155C) | 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 | 2500 Vrms Hipot | Class F (155C) | 0.44 (0.20) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 0.70 (0.32) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 0.80 (0.36) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 1.1 (0.50) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 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 | 2500 Vrms Hipot | Class F (155C) | 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 | 2500 Vrms Hipot | Class F (155C) | 0.44 (0.20) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 0.70 (0.32) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 0.80 (0.36) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 1.1 (0.50) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 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 | 2500 Vrms Hipot | Class F (155C) | 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 | 2500 Vrms Hipot | Class F (155C) | 0.44 (0.20) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 0.70 (0.32) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 0.80 (0.36) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 1.1 (0.50) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 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 | 2500 Vrms Hipot | Class F (155C) | 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 | 2500 Vrms Hipot | Class F (155C) | 0.44 (0.20) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 0.70 (0.32) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 0.80 (0.36) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 1.1 (0.50) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 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 | 2500 Vrms Hipot | Class F (155C) | 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 | 2500 Vrms Hipot | Class F (155C) | 0.44 (0.20) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 0.70 (0.32) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 0.80 (0.36) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 1.1 (0.50) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 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 | 2500 Vrms Hipot | Class F (155C) | 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 | 2500 Vrms Hipot | Class F (155C) | 0.44 (0.20) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 0.70 (0.32) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 0.80 (0.36) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 1.1 (0.50) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 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 | 2500 Vrms Hipot | Class F (155C) | 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 | 2500 Vrms Hipot | Class F (155C) | 0.44 (0.20) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 0.70 (0.32) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 0.80 (0.36) |
| ST-7-56 / DST-7-56 | 36 | 56 VCT @ 0.65A | 28 V @ 1.3 A | Single 115 V / Dual 115/230 V | 6 Pin / 8 Pin | 2500 Vrms Hipot | Class F (155C) | 1.1 (0.50) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 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 | 2500 Vrms Hipot | Class F (155C) | 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 | 2500 Vrms Hipot | Class F (155C) | 0.44 (0.20) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 0.70 (0.32) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 0.80 (0.36) |
| 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 | 2500 Vrms Hipot | Class F (155C) | 1.1 (0.50) |
| 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) |
| 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) |
| 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) |
| 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) |
| 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) |
| 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) |
| 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) |
| Mounting Hardware: Optional mounting screw (ST-MS) and nut (ST-MN) available. Size 7 has 4 mounting holes on 2.18 x 1.75 centers for #6 screws. | ||||||||
| 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-6-28_C17239774.pdf
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