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Specifications
Secondary Winding:
2
Isolation Voltage(Vrms):
2.5kV
Primary Winding(s):
1
Secondary Side Voltage:
8V;16V
Output Current:
300mA;150mA
Primary Side Voltage:
115V
Mfr. Part #:
ST-3-16
Package:
Through Hole-6P,34.9x28.6mm
Key Attributes
Model Number:
ST-3-16
Product Description
Product Overview
The Signal ST/DST Series Split/Tran Specialty Purpose & Class 2 Transformers are designed for split bobbin construction, offering superior isolation and low capacitive coupling. These transformers feature 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 and are available with single or dual primaries (115 V or 115/230 V, 50/60 Hz) and series or parallel secondaries. The Class F insulation system (155 C) and 2500 Vrms Hipot dielectric strength ensure robust performance. These transformers are RoHS compliant and carry multiple agency certifications, including UL and CSA recognition, making them ideal for various industrial and specialty applications.
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 to C22.2 #66.1, cCSAus certified to C22.2 #66.3 / UL 5085-3, UL Recognized UL5085-3 (Inherently Limited)
- Compliance: RoHS Compliant
- Origin: USA (implied by address)
Technical Specifications
| Size (VA) | L (inches/mm) | W (inches/mm) | H (inches/mm) | ML (inches/mm) | A (inches/mm) | B (inches/mm) | C (inches/mm) | Mounting Hardware (Optional) | Weight (lbs/kg) |
|---|---|---|---|---|---|---|---|---|---|
| 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) | - | 0.17 (0.08) |
| 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) | - | 0.25 (0.11) |
| 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) | Nylon 4-40 x 1.37 (4-40 x 34.9) | 0.44 (0.20) |
| 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) | Nylon 4-40 x 1.37 (4-40 x 34.9) | 0.70 (0.32) |
| 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) | Nylon 4-40 x 1.37 (4-40 x 34.9) | 0.80 (0.36) |
| 36 | 2.62 (66.7) | 2.18 (55.5) | 1.59 (40.4) | (4 mounting holes on 2.18 x 1.75 centers for #6 screws) | 0.40 (10.2) | 0.40 (10.2) | 1.85 (47.0) | ST-MS (screw), ST-MN (nut) available | 1.1 (0.50) |
General Specifications
- Power: 1.1 VA to 36 VA
- Dielectric Strength: 2500 Vrms Hipot
- Primaries: Single or dual primaries, 115 V or 115/230 V, 50/60 Hz
- Secondaries: Series or parallel
- Electrostatic Shield: Not necessary (split bobbin construction)
Part Number Selection Guide
ST Series (Single 115 V, 6 Pin)
| Part Number | Secondary RMS Rating (Series) | Secondary RMS Rating (Parallel) | Class 2 Marking |
|---|---|---|---|
| ST-2-10 | 10 VCT @ 0.11 A | 5 V @ 0.22 A | **# |
| ST-3-10 | 10 VCT @ 0.25 A | 5 V @ 0.5 A | *# |
| ST-4-10 | 10 VCT @ 0.6 A | 5 V @ 1.2 A | *# |
| ST-5-10 | 10 VCT @ 1.2 A | 5 V @ 2.4 A | *# |
| ST-6-10 | 10 VCT @ 2.0 A | 5 V @ 4.0 A | - |
| ST-7-10 | 10 VCT @ 3.6 A | 5 V @ 7.2 A | - |
| ST-2-12 | 12.6 VCT @ 0.09 A | 6.3 V @ 0.18 A | **# |
| ST-3-12 | 12.6 VCT @ 0.2 A | 6.3 V @ 0.4 A | *# |
| ST-4-12 | 12.6 VCT @ 0.5 A | 6.3 V @ 1.0 A | *# |
| ST-5-12 | 12.6 VCT @ 1.0 A | 6.3 V @ 2.0 A | *# |
| ST-6-12 | 12.6 VCT @ 1.6 A | 6.3 V @ 3.2 A | - |
| ST-7-12 | 12.6 VCT @ 2.85 A | 6.3 V @ 5.7 A | - |
| ST-2-16 | 16 VCT @ 0.07 A | 8 V @ 0.14 A | **# |
| ST-3-16 | 16 VCT @ 0.15 A | 8 V @ 0.3 A | *# |
| ST-4-16 | 16 VCT @ 0.4 A | 8 V @ 0.8 A | *# |
| ST-5-16 | 16 VCT @ 0.8 A | 8 V @ 1.6 A | *# |
| ST-6-16 | 16 VCT @ 1.25 A | 8 V @ 2.5 A | - |
| ST-7-16 | 16 VCT @ 2.25 A | 8 V @ 4.5 A | - |
| ST-2-20 | 20 VCT @ 0.055 A | 10 V @ 0.11 A | **# |
| ST-3-20 | 20 VCT @ 0.12 A | 10 V @ 0.24 A | *# |
| ST-4-20 | 20 VCT @ 0.3 A | 10 V @ 0.6 A | *# |
| ST-5-20 | 20 VCT @ 0.6 A | 10 V @ 1.2 A | *# |
| ST-6-20 | 20 VCT @ 1.0 A | 10 V @ 2.0 A | - |
| ST-7-20 | 20 VCT @ 1.8 A | 10 V @ 3.6 A | - |
| ST-2-24 | 24 VCT @ 0.045 A | 12 V @ 0.09 A | **# |
| ST-3-24 | 24 VCT @ 0.1 A | 12 V @ 0.2 A | *# |
| ST-4-24 | 24 VCT @ 0.25 A | 12 V @ 0.5 A | *# |
| ST-5-24 | 24 VCT @ 0.5 A | 12 V @ 1.0 A | *# |
| ST-6-24 | 24 VCT @ 0.8 A | 12 V @ 1.6 A | - |
| ST-7-24 | 24 VCT @ 1.5 A | 12 V @ 3.0 A | - |
| ST-2-28 | 28 VCT @ 0.04 A | 14 V @ 0.08 A | - |
| ST-3-28 | 28 VCT @ 0.085 A | 14 V @ 0.17 A | - |
| ST-4-28 | 28 VCT @ 0.2 A | 14 V @ 0.4 A | - |
| ST-5-28 | 28 VCT @ 0.42 A | 14 V @ 0.84 A | - |
| ST-6-28 | 28 VCT @ 0.7 A | 14 V @ 1.4 A | - |
| ST-7-28 | 28 VCT @ 1.3 A | 14 V @ 2.6 A | - |
| ST-2-36 | 36 VCT @ 0.03 A | 18 V @ 0.06 A | - |
| ST-3-36 | 36 VCT @ 0.065 A | 18 V @ 0.13 A | - |
| ST-4-36 | 36 VCT @ 0.17 A | 18 V @ 0.34 A | - |
| ST-5-36 | 36 VCT @ 0.35 A | 18 V @ 0.7 A | - |
| ST-6-36 | 36 VCT @ 0.55 A | 18 V @ 1.1 A | - |
| ST-7-36 | 36 VCT @ 1.0 A | 18 V @ 2.0 A | - |
| ST-2-48 | 48 VCT @ 0.023 A | 24 V @ 0.046 A | - |
| ST-3-48 | 48 VCT @ 0.05 A | 24 V @ 0.1 A | - |
| ST-4-48 | 48 VCT @ 0.125 A | 24 V @ 0.25 A | - |
| ST-5-48 | 48 VCT @ 0.25 A | 24 V @ 0.5 A | - |
| ST-6-48 | 48 VCT @ 0.4 A | 24 V @ 0.8 A | - |
| ST-7-48 | 48 VCT @ 0.75 A | 24 V @ 1.5 A | - |
| ST-2-56 | 56 VCT @ 0.02 A | 28 V @ 0.04 A | - |
| ST-3-56 | 56 VCT @ 0.045 A | 28 V @ 0.09 A | - |
| ST-4-56 | 56 VCT @ 0.11 A | 28 V @ 0.22 A | - |
| ST-5-56 | 56 VCT @ 0.22 A | 28 V @ 0.44 A | - |
| ST-6-56 | 56 VCT @ 0.35 A | 28 V @ 0.7 A | - |
| ST-7-56 | 56 VCT @ 0.65A | 28 V @ 1.3 A | - |
| ST-2-120 | 120 VCT @ 0.01 A | 60 V @ 0.02 A | - |
| ST-3-120 | 120 VCT @ 0.02 A | 60 V @ 0.04 A | - |
| ST-4-120 | 120 VCT @ 0.05 A | 60 V @ 0.1 A | - |
| ST-5-120 | 120 VCT @ 0.1 A | 60 V @ 0.2 A | - |
| ST-6-120 | 120 VCT @ 0.16 A | 60 V @ 0.32 A | - |
| ST-7-120 | 120 VCT @ 0.3 A | 60 V @ 0.6 A | - |
DST Series (Dual 115/230 V, 8 Pin)
| Part Number | Secondary RMS Rating (Series) | Secondary RMS Rating (Parallel) | Class 2 Marking |
|---|---|---|---|
| DST-2-10 | 10 VCT @ 0.11 A | 5 V @ 0.22 A | **# |
| DST-3-10 | 10 VCT @ 0.25 A | 5 V @ 0.5 A | *# |
| DST-4-10 | 10 VCT @ 0.6 A | 5 V @ 1.2 A | *# |
| DST-5-10 | 10 VCT @ 1.2 A | 5 V @ 2.4 A | *# |
| DST-6-10 | 10 VCT @ 2.0 A | 5 V @ 4.0 A | - |
| DST-7-10 | 10 VCT @ 3.6 A | 5 V @ 7.2 A | - |
| DST-2-12 | 12.6 VCT @ 0.09 A | 6.3 V @ 0.18 A | **# |
| DST-3-12 | 12.6 VCT @ 0.2 A | 6.3 V @ 0.4 A | *# |
| DST-4-12 | 12.6 VCT @ 0.5 A | 6.3 V @ 1.0 A | *# |
| DST-5-12 | 12.6 VCT @ 1.0 A | 6.3 V @ 2.0 A | *# |
| DST-6-12 | 12.6 VCT @ 1.6 A | 6.3 V @ 3.2 A | - |
| DST-7-12 | 12.6 VCT @ 2.85 A | 6.3 V @ 5.7 A | - |
| DST-2-16 | 16 VCT @ 0.07 A | 8 V @ 0.14 A | **# |
| DST-3-16 | 16 VCT @ 0.15 A | 8 V @ 0.3 A | *# |
| DST-4-16 | 16 VCT @ 0.4 A | 8 V @ 0.8 A | *# |
| DST-5-16 | 16 VCT @ 0.8 A | 8 V @ 1.6 A | *# |
| DST-6-16 | 16 VCT @ 1.25 A | 8 V @ 2.5 A | - |
| DST-7-16 | 16 VCT @ 2.25 A | 8 V @ 4.5 A | - |
| DST-2-20 | 20 VCT @ 0.055 A | 10 V @ 0.11 A | **# |
| DST-3-20 | 20 VCT @ 0.12 A | 10 V @ 0.24 A | *# |
| DST-4-20 | 20 VCT @ 0.3 A | 10 V @ 0.6 A | *# |
| DST-5-20 | 20 VCT @ 0.6 A | 10 V @ 1.2 A | *# |
| DST-6-20 | 20 VCT @ 1.0 A | 10 V @ 2.0 A | - |
| DST-7-20 | 20 VCT @ 1.8 A | 10 V @ 3.6 A | - |
| DST-2-24 | 24 VCT @ 0.045 A | 12 V @ 0.09 A | **# |
| DST-3-24 | 24 VCT @ 0.1 A | 12 V @ 0.2 A | *# |
| DST-4-24 | 24 VCT @ 0.25 A | 12 V @ 0.5 A | *# |
| DST-5-24 | 24 VCT @ 0.5 A | 12 V @ 1.0 A | *# |
| DST-6-24 | 24 VCT @ 0.8 A | 12 V @ 1.6 A | - |
| DST-7-24 | 24 VCT @ 1.5 A | 12 V @ 3.0 A | - |
| DST-2-28 | 28 VCT @ 0.04 A | 14 V @ 0.08 A | - |
| DST-3-28 | 28 VCT @ 0.085 A | 14 V @ 0.17 A | - |
| DST-4-28 | 28 VCT @ 0.2 A | 14 V @ 0.4 A | - |
| DST-5-28 | 28 VCT @ 0.42 A | 14 V @ 0.84 A | - |
| DST-6-28 | 28 VCT @ 0.7 A | 14 V @ 1.4 A | - |
| DST-7-28 | 28 VCT @ 1.3 A | 14 V @ 2.6 A | - |
| DST-2-36 | 36 VCT @ 0.03 A | 18 V @ 0.06 A | - |
| DST-3-36 | 36 VCT @ 0.065 A | 18 V @ 0.13 A | - |
| DST-4-36 | 36 VCT @ 0.17 A | 18 V @ 0.34 A | - |
| DST-5-36 | 36 VCT @ 0.35 A | 18 V @ 0.7 A | - |
| DST-6-36 | 36 VCT @ 0.55 A | 18 V @ 1.1 A | - |
| DST-7-36 | 36 VCT @ 1.0 A | 18 V @ 2.0 A | - |
| DST-2-48 | 48 VCT @ 0.023 A | 24 V @ 0.046 A | - |
| DST-3-48 | 48 VCT @ 0.05 A | 24 V @ 0.1 A | - |
| DST-4-48 | 48 VCT @ 0.125 A | 24 V @ 0.25 A | - |
| DST-5-48 | 48 VCT @ 0.25 A | 24 V @ 0.5 A | - |
| DST-6-48 | 48 VCT @ 0.4 A | 24 V @ 0.8 A | - |
| DST-7-48 | 48 VCT @ 0.75 A | 24 V @ 1.5 A | - |
| DST-2-56 | 56 VCT @ 0.02 A | 28 V @ 0.04 A | - |
| DST-3-56 | 56 VCT @ 0.045 A | 28 V @ 0.09 A | - |
| DST-4-56 | 56 VCT @ 0.11 A | 28 V @ 0.22 A | - |
| DST-5-56 | 56 VCT @ 0.22 A | 28 V @ 0.44 A | - |
| DST-6-56 | 56 VCT @ 0.35 A | 28 V @ 0.7 A | - |
| DST-7-56 | 56 VCT @ 0.65A | 28 V @ 1.3 A | - |
| DST-2-120 | 120 VCT @ 0.01 A | 60 V @ 0.02 A | - |
| DST-3-120 | 120 VCT @ 0.02 A | 60 V @ 0.04 A | - |
| DST-4-120 | 120 VCT @ 0.05 A | 60 V @ 0.1 A | - |
| DST-5-120 | 120 VCT @ 0.1 A | 60 V @ 0.2 A | - |
| DST-6-120 | 120 VCT @ 0.16 A | 60 V @ 0.32 A | - |
| DST-7-120 | 120 VCT @ 0.3 A | 60 V @ 0.6 A | - |
Recommended Secondary Fuse Values
| Reference | Fuse Value |
|---|---|
| (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 |
Note: The Class 2 marking (*), (**), or (#) indicates specific certifications. Consult the datasheet for details on CSA certification as Inherently Limited or Non Inherently Limited.
2411272143_Bel-Fuse-ST-3-16_C17589819.pdf
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