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Specifications
Secondary Winding:
2
Isolation Voltage(Vrms):
2.5kV
Primary Winding(s):
1
Secondary Side Voltage:
60V;120V
Output Current:
600mA;300mA
Primary Side Voltage:
115V
Mfr. Part #:
ST-7-120
Package:
Through Hole-6P,66.7x55.5mm
Key Attributes
Model Number:
ST-7-120
Product Description
Product Overview
The Signal ST/DST Series Split/Tran Specialty Purpose & Class 2 Transformers are designed for printed circuit board mounting, featuring a split bobbin construction with dual cavities that provide superior isolation and low capacitive coupling. This design eliminates the need for an electrostatic shield. The transformers offer 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, and are available with single or dual primaries (115 V or 115/230 V, 50/60 Hz) and series or parallel secondaries.
Product Attributes
- Brand: Signal Transformer
- Series: ST / DST Series Split/Tran
- Construction: Split Bobbin with Dual Cavity
- Insulation System: Class F, 155 C
- Certifications: UL 1446, UL Recognized 506 / UL 5085-1, 2, CSA Certified C22.2 #66.1, cCSAus Certified C22.2 #66.3 / UL 5085-3, UL5085-3 Inherently Limited
- Compliance: RoHS Compliant
- Customization: Custom versions available upon request
Technical Specifications
| Model | Power (VA) | Secondary RMS Rating (Series) | Secondary RMS Rating (Parallel) | Primary Voltage (V) | Frequency (Hz) | Dielectric Strength (Vrms Hipot) | Dimensions (L x W x H) (inches) | Weight (lbs) | Mounting Hole Centers (ML x ML) (inches) | Pin Spacing (A x B) (inches) | Pin to Pin Spacing (C) (inches) | Optional Mounting Hardware |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ST-2-10 / DST-2-10 | 1.1 | 10 VCT @ 0.11 A | 5 V @ 0.22 A | 115 V / 115/230 V | 50/60 | 2500 | 1.37 x 1.12 x 0.97 | 0.17 | - | 0.25 x 0.25 | 1.20 | - |
| ST-3-10 / DST-3-10 | 2.4 | 10 VCT @ 0.25 A | 5 V @ 0.5 A | 115 V / 115/230 V | 50/60 | 2500 | 1.37 x 1.12 x 1.21 | 0.25 | - | 0.25 x 0.25 | 1.20 | - |
| ST-4-10 / DST-4-10 | 6 | 10 VCT @ 0.6 A | 5 V @ 1.2 A | 115 V / 115/230 V | 50/60 | 2500 | 1.62 x 1.31 x 1.31 | 0.44 | 1.06 | 0.25 x 0.35 | 1.25 | Nylon 4-40 x 1.37 |
| ST-5-10 / DST-5-10 | 12 | 10 VCT @ 1.2 A | 5 V @ 2.4 A | 115 V / 115/230 V | 50/60 | 2500 | 1.91 x 1.59 x 1.45 | 0.70 | 1.25 | 0.30 x 0.40 | 1.41 | Nylon 4-40 x 1.37 |
| ST-6-10 / DST-6-10 | 20 | 10 VCT @ 2.0 A | 5 V @ 4.0 A | 115 V / 115/230 V | 50/60 | 2500 | 2.25 x 1.88 x 1.45 | 0.80 | 1.50 | 0.30 x 0.40 | 1.60 | Nylon 4-40 x 1.37 |
| ST-7-10 / DST-7-10 | 36 | 10 VCT @ 3.6 A | 5 V @ 7.2 A | 115 V / 115/230 V | 50/60 | 2500 | 2.62 x 2.18 x 1.59 | 1.10 | 2.18 x 1.75 (for #6 screws) | 0.40 x 0.40 | 1.85 | ST-MS (screw), ST-MN (nut) |
| ST-2-12 / DST-2-12 | 1.1 | 12.6 VCT @ 0.09 A | 6.3 V @ 0.18 A | 115 V / 115/230 V | 50/60 | 2500 | 1.37 x 1.12 x 0.97 | 0.17 | - | 0.25 x 0.25 | 1.20 | - |
| ST-3-12 / DST-3-12 | 2.4 | 12.6 VCT @ 0.2 A | 6.3 V @ 0.4 A | 115 V / 115/230 V | 50/60 | 2500 | 1.37 x 1.12 x 1.21 | 0.25 | - | 0.25 x 0.25 | 1.20 | - |
| ST-4-12 / DST-4-12 | 6 | 12.6 VCT @ 0.5 A | 6.3 V @ 1.0 A | 115 V / 115/230 V | 50/60 | 2500 | 1.62 x 1.31 x 1.31 | 0.44 | 1.06 | 0.25 x 0.35 | 1.25 | Nylon 4-40 x 1.37 |
| ST-5-12 / DST-5-12 | 12 | 12.6 VCT @ 1.0 A | 6.3 V @ 2.0 A | 115 V / 115/230 V | 50/60 | 2500 | 1.91 x 1.59 x 1.45 | 0.70 | 1.25 | 0.30 x 0.40 | 1.41 | Nylon 4-40 x 1.37 |
| ST-6-12 / DST-6-12 | 20 | 12.6 VCT @ 1.6 A | 6.3 V @ 3.2 A | 115 V / 115/230 V | 50/60 | 2500 | 2.25 x 1.88 x 1.45 | 0.80 | 1.50 | 0.30 x 0.40 | 1.60 | Nylon 4-40 x 1.37 |
| ST-7-12 / DST-7-12 | 36 | 12.6 VCT @ 2.85 A | 6.3 V @ 5.7 A | 115 V / 115/230 V | 50/60 | 2500 | 2.62 x 2.18 x 1.59 | 1.10 | 2.18 x 1.75 (for #6 screws) | 0.40 x 0.40 | 1.85 | ST-MS (screw), ST-MN (nut) |
| ST-2-16 / DST-2-16 | 1.1 | 16 VCT @ 0.07 A | 8 V @ 0.14 A | 115 V / 115/230 V | 50/60 | 2500 | 1.37 x 1.12 x 0.97 | 0.17 | - | 0.25 x 0.25 | 1.20 | - |
| ST-3-16 / DST-3-16 | 2.4 | 16 VCT @ 0.15 A | 8 V @ 0.3 A | 115 V / 115/230 V | 50/60 | 2500 | 1.37 x 1.12 x 1.21 | 0.25 | - | 0.25 x 0.25 | 1.20 | - |
| ST-4-16 / DST-4-16 | 6 | 16 VCT @ 0.4 A | 8 V @ 0.8 A | 115 V / 115/230 V | 50/60 | 2500 | 1.62 x 1.31 x 1.31 | 0.44 | 1.06 | 0.25 x 0.35 | 1.25 | Nylon 4-40 x 1.37 |
| ST-5-16 / DST-5-16 | 12 | 16 VCT @ 0.8 A | 8 V @ 1.6 A | 115 V / 115/230 V | 50/60 | 2500 | 1.91 x 1.59 x 1.45 | 0.70 | 1.25 | 0.30 x 0.40 | 1.41 | Nylon 4-40 x 1.37 |
| ST-6-16 / DST-6-16 | 20 | 16 VCT @ 1.25 A | 8 V @ 2.5 A | 115 V / 115/230 V | 50/60 | 2500 | 2.25 x 1.88 x 1.45 | 0.80 | 1.50 | 0.30 x 0.40 | 1.60 | Nylon 4-40 x 1.37 |
| ST-7-16 / DST-7-16 | 36 | 16 VCT @ 2.25 A | 8 V @ 4.5 A | 115 V / 115/230 V | 50/60 | 2500 | 2.62 x 2.18 x 1.59 | 1.10 | 2.18 x 1.75 (for #6 screws) | 0.40 x 0.40 | 1.85 | ST-MS (screw), ST-MN (nut) |
| ST-2-20 / DST-2-20 | 1.1 | 20 VCT @ 0.055 A | 10 V @ 0.11 A | 115 V / 115/230 V | 50/60 | 2500 | 1.37 x 1.12 x 0.97 | 0.17 | - | 0.25 x 0.25 | 1.20 | - |
| ST-3-20 / DST-3-20 | 2.4 | 20 VCT @ 0.12 A | 10 V @ 0.24 A | 115 V / 115/230 V | 50/60 | 2500 | 1.37 x 1.12 x 1.21 | 0.25 | - | 0.25 x 0.25 | 1.20 | - |
| ST-4-20 / DST-4-20 | 6 | 20 VCT @ 0.3 A | 10 V @ 0.6 A | 115 V / 115/230 V | 50/60 | 2500 | 1.62 x 1.31 x 1.31 | 0.44 | 1.06 | 0.25 x 0.35 | 1.25 | Nylon 4-40 x 1.37 |
| ST-5-20 / DST-5-20 | 12 | 20 VCT @ 0.6 A | 10 V @ 1.2 A | 115 V / 115/230 V | 50/60 | 2500 | 1.91 x 1.59 x 1.45 | 0.70 | 1.25 | 0.30 x 0.40 | 1.41 | Nylon 4-40 x 1.37 |
| ST-6-20 / DST-6-20 | 20 | 20 VCT @ 1.0 A | 10 V @ 2.0 A | 115 V / 115/230 V | 50/60 | 2500 | 2.25 x 1.88 x 1.45 | 0.80 | 1.50 | 0.30 x 0.40 | 1.60 | Nylon 4-40 x 1.37 |
| ST-7-20 / DST-7-20 | 36 | 20 VCT @ 1.8 A | 10 V @ 3.6 A | 115 V / 115/230 V | 50/60 | 2500 | 2.62 x 2.18 x 1.59 | 1.10 | 2.18 x 1.75 (for #6 screws) | 0.40 x 0.40 | 1.85 | ST-MS (screw), ST-MN (nut) |
| ST-2-24 / DST-2-24 | 1.1 | 24 VCT @ 0.045 A | 12 V @ 0.09 A | 115 V / 115/230 V | 50/60 | 2500 | 1.37 x 1.12 x 0.97 | 0.17 | - | 0.25 x 0.25 | 1.20 | - |
| ST-3-24 / DST-3-24 | 2.4 | 24 VCT @ 0.1 A | 12 V @ 0.2 A | 115 V / 115/230 V | 50/60 | 2500 | 1.37 x 1.12 x 1.21 | 0.25 | - | 0.25 x 0.25 | 1.20 | - |
| ST-4-24 / DST-4-24 | 6 | 24 VCT @ 0.25 A | 12 V @ 0.5 A | 115 V / 115/230 V | 50/60 | 2500 | 1.62 x 1.31 x 1.31 | 0.44 | 1.06 | 0.25 x 0.35 | 1.25 | Nylon 4-40 x 1.37 |
| ST-5-24 / DST-5-24 | 12 | 24 VCT @ 0.5 A | 12 V @ 1.0 A | 115 V / 115/230 V | 50/60 | 2500 | 1.91 x 1.59 x 1.45 | 0.70 | 1.25 | 0.30 x 0.40 | 1.41 | Nylon 4-40 x 1.37 |
| ST-6-24 / DST-6-24 | 20 | 24 VCT @ 0.8 A | 12 V @ 1.6 A | 115 V / 115/230 V | 50/60 | 2500 | 2.25 x 1.88 x 1.45 | 0.80 | 1.50 | 0.30 x 0.40 | 1.60 | Nylon 4-40 x 1.37 |
| ST-7-24 / DST-7-24 | 36 | 24 VCT @ 1.5 A | 12 V @ 3.0 A | 115 V / 115/230 V | 50/60 | 2500 | 2.62 x 2.18 x 1.59 | 1.10 | 2.18 x 1.75 (for #6 screws) | 0.40 x 0.40 | 1.85 | ST-MS (screw), ST-MN (nut) |
| ST-2-28 / DST-2-28 | 1.1 | 28 VCT @ 0.04 A | 14 V @ 0.08 A | 115 V / 115/230 V | 50/60 | 2500 | 1.37 x 1.12 x 0.97 | 0.17 | - | 0.25 x 0.25 | 1.20 | - |
| ST-3-28 / DST-3-28 | 2.4 | 28 VCT @ 0.085 A | 14 V @ 0.17 A | 115 V / 115/230 V | 50/60 | 2500 | 1.37 x 1.12 x 1.21 | 0.25 | - | 0.25 x 0.25 | 1.20 | - |
| ST-4-28 / DST-4-28 | 6 | 28 VCT @ 0.2 A | 14 V @ 0.4 A | 115 V / 115/230 V | 50/60 | 2500 | 1.62 x 1.31 x 1.31 | 0.44 | 1.06 | 0.25 x 0.35 | 1.25 | Nylon 4-40 x 1.37 |
| ST-5-28 / DST-5-28 | 12 | 28 VCT @ 0.42 A | 14 V @ 0.84 A | 115 V / 115/230 V | 50/60 | 2500 | 1.91 x 1.59 x 1.45 | 0.70 | 1.25 | 0.30 x 0.40 | 1.41 | Nylon 4-40 x 1.37 |
| ST-6-28 / DST-6-28 | 20 | 28 VCT @ 0.7 A | 14 V @ 1.4 A | 115 V / 115/230 V | 50/60 | 2500 | 2.25 x 1.88 x 1.45 | 0.80 | 1.50 | 0.30 x 0.40 | 1.60 | Nylon 4-40 x 1.37 |
| ST-7-28 / DST-7-28 | 36 | 28 VCT @ 1.3 A | 14 V @ 2.6 A | 115 V / 115/230 V | 50/60 | 2500 | 2.62 x 2.18 x 1.59 | 1.10 | 2.18 x 1.75 (for #6 screws) | 0.40 x 0.40 | 1.85 | ST-MS (screw), ST-MN (nut) |
| ST-2-36 / DST-2-36 | 1.1 | 36 VCT @ 0.03 A | 18 V @ 0.06 A | 115 V / 115/230 V | 50/60 | 2500 | 1.37 x 1.12 x 0.97 | 0.17 | - | 0.25 x 0.25 | 1.20 | - |
| ST-3-36 / DST-3-36 | 2.4 | 36 VCT @ 0.065 A | 18 V @ 0.13 A | 115 V / 115/230 V | 50/60 | 2500 | 1.37 x 1.12 x 1.21 | 0.25 | - | 0.25 x 0.25 | 1.20 | - |
| ST-4-36 / DST-4-36 | 6 | 36 VCT @ 0.17 A | 18 V @ 0.34 A | 115 V / 115/230 V | 50/60 | 2500 | 1.62 x 1.31 x 1.31 | 0.44 | 1.06 | 0.25 x 0.35 | 1.25 | Nylon 4-40 x 1.37 |
| ST-5-36 / DST-5-36 | 12 | 36 VCT @ 0.35 A | 18 V @ 0.7 A | 115 V / 115/230 V | 50/60 | 2500 | 1.91 x 1.59 x 1.45 | 0.70 | 1.25 | 0.30 x 0.40 | 1.41 | Nylon 4-40 x 1.37 |
| ST-6-36 / DST-6-36 | 20 | 36 VCT @ 0.55 A | 18 V @ 1.1 A | 115 V / 115/230 V | 50/60 | 2500 | 2.25 x 1.88 x 1.45 | 0.80 | 1.50 | 0.30 x 0.40 | 1.60 | Nylon 4-40 x 1.37 |
| ST-7-36 / DST-7-36 | 36 | 36 VCT @ 1.0 A | 18 V @ 2.0 A | 115 V / 115/230 V | 50/60 | 2500 | 2.62 x 2.18 x 1.59 | 1.10 | 2.18 x 1.75 (for #6 screws) | 0.40 x 0.40 | 1.85 | ST-MS (screw), ST-MN (nut) |
| ST-2-48 / DST-2-48 | 1.1 | 48 VCT @ 0.023 A | 24 V @ 0.046 A | 115 V / 115/230 V | 50/60 | 2500 | 1.37 x 1.12 x 0.97 | 0.17 | - | 0.25 x 0.25 | 1.20 | - |
| ST-3-48 / DST-3-48 | 2.4 | 48 VCT @ 0.05 A | 24 V @ 0.1 A | 115 V / 115/230 V | 50/60 | 2500 | 1.37 x 1.12 x 1.21 | 0.25 | - | 0.25 x 0.25 | 1.20 | - |
| ST-4-48 / DST-4-48 | 6 | 48 VCT @ 0.125 A | 24 V @ 0.25 A | 115 V / 115/230 V | 50/60 | 2500 | 1.62 x 1.31 x 1.31 | 0.44 | 1.06 | 0.25 x 0.35 | 1.25 | Nylon 4-40 x 1.37 |
| ST-5-48 / DST-5-48 | 12 | 48 VCT @ 0.25 A | 24 V @ 0.5 A | 115 V / 115/230 V | 50/60 | 2500 | 1.91 x 1.59 x 1.45 | 0.70 | 1.25 | 0.30 x 0.40 | 1.41 | Nylon 4-40 x 1.37 |
| ST-6-48 / DST-6-48 | 20 | 48 VCT @ 0.4 A | 24 V @ 0.8 A | 115 V / 115/230 V | 50/60 | 2500 | 2.25 x 1.88 x 1.45 | 0.80 | 1.50 | 0.30 x 0.40 | 1.60 | Nylon 4-40 x 1.37 |
| ST-7-48 / DST-7-48 | 36 | 48 VCT @ 0.75 A | 24 V @ 1.5 A | 115 V / 115/230 V | 50/60 | 2500 | 2.62 x 2.18 x 1.59 | 1.10 | 2.18 x 1.75 (for #6 screws) | 0.40 x 0.40 | 1.85 | ST-MS (screw), ST-MN (nut) |
| ST-2-56 / DST-2-56 | 1.1 | 56 VCT @ 0.02 A | 28 V @ 0.04 A | 115 V / 115/230 V | 50/60 | 2500 | 1.37 x 1.12 x 0.97 | 0.17 | - | 0.25 x 0.25 | 1.20 | - |
| ST-3-56 / DST-3-56 | 2.4 | 56 VCT @ 0.045 A | 28 V @ 0.09 A | 115 V / 115/230 V | 50/60 | 2500 | 1.37 x 1.12 x 1.21 | 0.25 | - | 0.25 x 0.25 | 1.20 | - |
| ST-4-56 / DST-4-56 | 6 | 56 VCT @ 0.11 A | 28 V @ 0.22 A | 115 V / 115/230 V | 50/60 | 2500 | 1.62 x 1.31 x 1.31 | 0.44 | 1.06 | 0.25 x 0.35 | 1.25 | Nylon 4-40 x 1.37 |
| ST-5-56 / DST-5-56 | 12 | 56 VCT @ 0.22 A | 28 V @ 0.44 A | 115 V / 115/230 V | 50/60 | 2500 | 1.91 x 1.59 x 1.45 | 0.70 | 1.25 | 0.30 x 0.40 | 1.41 | Nylon 4-40 x 1.37 |
| ST-6-56 / DST-6-56 | 20 | 56 VCT @ 0.35 A | 28 V @ 0.7 A | 115 V / 115/230 V | 50/60 | 2500 | 2.25 x 1.88 x 1.45 | 0.80 | 1.50 | 0.30 x 0.40 | 1.60 | Nylon 4-40 x 1.37 |
| ST-7-56 / DST-7-56 | 36 | 56 VCT @ 0.65 A | 28 V @ 1.3 A | 115 V / 115/230 V | 50/60 | 2500 | 2.62 x 2.18 x 1.59 | 1.10 | 2.18 x 1.75 (for #6 screws) | 0.40 x 0.40 | 1.85 | ST-MS (screw), ST-MN (nut) |
| ST-2-120 / DST-2-120 | 1.1 | 120 VCT @ 0.01 A | 60 V @ 0.02 A | 115 V / 115/230 V | 50/60 | 2500 | 1.37 x 1.12 x 0.97 | 0.17 | - | 0.25 x 0.25 | 1.20 | - |
| ST-3-120 / DST-3-120 | 2.4 | 120 VCT @ 0.02 A | 60 V @ 0.04 A | 115 V / 115/230 V | 50/60 | 2500 | 1.37 x 1.12 x 1.21 | 0.25 | - | 0.25 x 0.25 | 1.20 | - |
| ST-4-120 / DST-4-120 | 6 | 120 VCT @ 0.05 A | 60 V @ 0.1 A | 115 V / 115/230 V | 50/60 | 2500 | 1.62 x 1.31 x 1.31 | 0.44 | 1.06 | 0.25 x 0.35 | 1.25 | Nylon 4-40 x 1.37 |
| ST-5-120 / DST-5-120 | 12 | 120 VCT @ 0.1 A | 60 V @ 0.2 A | 115 V / 115/230 V | 50/60 | 2500 | 1.91 x 1.59 x 1.45 | 0.70 | 1.25 | 0.30 x 0.40 | 1.41 | Nylon 4-40 x 1.37 |
| ST-6-120 / DST-6-120 | 20 | 120 VCT @ 0.16 A | 60 V @ 0.32 A | 115 V / 115/230 V | 50/60 | 2500 | 2.25 x 1.88 x 1.45 | 0.80 | 1.50 | 0.30 x 0.40 | 1.60 | Nylon 4-40 x 1.37 |
| ST-7-120 / DST-7-120 | 36 | 120 VCT @ 0.3 A | 60 V @ 0.6 A | 115 V / 115/230 V | 50/60 | 2500 | 2.62 x 2.18 x 1.59 | 1.10 | 2.18 x 1.75 (for #6 screws) | 0.40 x 0.40 | 1.85 | ST-MS (screw), ST-MN (nut) |
Note: Symbols (*), (**), (#) in part numbers indicate Class 2 ratings. See datasheet for specific fuse rating recommendations.
2411272143_Bel-Fuse-ST-7-120_C17464996.pdf
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