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Specifications
Secondary Winding:
2
Isolation Voltage(Vrms):
2.5kV
Primary Winding(s):
1
Secondary Side Voltage:
28V;56V
Output Current:
220mA;110mA
Primary Side Voltage:
115V
Mfr. Part #:
ST-4-56
Package:
Through Hole-6P,41.3x33.3mm
Key Attributes
Model Number:
ST-4-56
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. Suitable for a wide range of power applications from 1.1 VA to 36 VA, they feature Class F insulation (155C) and meet stringent agency certifications including UL and CSA. Custom versions are available upon request.
Product Attributes
- Brand: Signal Transformer (Bel Fuse)
- Series: ST / DST Split/Tran
- Construction: Split Bobbin with Dual Cavity
- Insulation System: Class F (155 C)
- Compliance: RoHS Compliant
- 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 (**)
- UL Recognized UL5085-3, Inherently Limited (#) File # E116583
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) | 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) | 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) | 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) | 0.80 (0.36) |
| 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) | 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 due to split bobbin construction
- Mounting Hardware: See chart (ST-MS screw, ST-MN nut available from Signal)
Part Number Selection Examples
| Part Number | Secondary RMS Rating (Series) | Secondary RMS Rating (Parallel) | Primary Configuration |
|---|---|---|---|
| ST-2-10**# | 10 VCT @ 0.11 A | 5 V @ 0.22 A | Single 115 V (6 Pin) |
| DST-2-10**# | 10 VCT @ 0.11 A | 5 V @ 0.22 A | Dual 115/230 V (8 Pin) |
| ST-3-10*# | 10 VCT @ 0.25 A | 5 V @ 0.5 A | Single 115 V (6 Pin) |
| DST-3-10*# | 10 VCT @ 0.25 A | 5 V @ 0.5 A | Dual 115/230 V (8 Pin) |
| ST-6-10 | 10 VCT @ 2.0 A | 5 V @ 4.0 A | Single 115 V (6 Pin) |
| DST-6-10 | 10 VCT @ 2.0 A | 5 V @ 4.0 A | Dual 115/230 V (8 Pin) |
| ST-7-12 | 12.6 VCT @ 2.85 A | 6.3 V @ 5.7 A | Single 115 V (6 Pin) |
| DST-7-12 | 12.6 VCT @ 2.85 A | 6.3 V @ 5.7 A | Dual 115/230 V (8 Pin) |
| ST-4-16*# | 16 VCT @ 0.4 A | 8 V @ 0.8 A | Single 115 V (6 Pin) |
| DST-4-16*# | 16 VCT @ 0.4 A | 8 V @ 0.8 A | Dual 115/230 V (8 Pin) |
| ST-5-20*# | 20 VCT @ 0.6 A | 10 V @ 1.2 A | Single 115 V (6 Pin) |
| DST-5-20*# | 20 VCT @ 0.6 A | 10 V @ 1.2 A | Dual 115/230 V (8 Pin) |
| ST-7-24 | 24 VCT @ 1.5 A | 12 V @ 3.0 A | Single 115 V (6 Pin) |
| DST-7-24 | 24 VCT @ 1.5 A | 12 V @ 3.0 A | Dual 115/230 V (8 Pin) |
| ST-3-28 | 28 VCT @ 0.085 A | 14 V @ 0.17 A | Single 115 V (6 Pin) |
| DST-3-28 | 28 VCT @ 0.085 A | 14 V @ 0.17 A | Dual 115/230 V (8 Pin) |
| ST-5-36 | 36 VCT @ 0.35 A | 18 V @ 0.7 A | Single 115 V (6 Pin) |
| DST-5-36 | 36 VCT @ 0.35 A | 18 V @ 0.7 A | Dual 115/230 V (8 Pin) |
| ST-6-48 | 48 VCT @ 0.4 A | 24 V @ 0.8 A | Single 115 V (6 Pin) |
| DST-6-48 | 48 VCT @ 0.4 A | 24 V @ 0.8 A | Dual 115/230 V (8 Pin) |
| ST-2-56 | 56 VCT @ 0.02 A | 28 V @ 0.04 A | Single 115 V (6 Pin) |
| DST-2-56 | 56 VCT @ 0.02 A | 28 V @ 0.04 A | Dual 115/230 V (8 Pin) |
| ST-4-120 | 120 VCT @ 0.05 A | 60 V @ 0.1 A | Single 115 V (6 Pin) |
| DST-4-120 | 120 VCT @ 0.05 A | 60 V @ 0.1 A | Dual 115/230 V (8 Pin) |
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
Contact Information
- Address: 128 Atlantic Avenue, Lynbrook, NY 11563
- Toll Free: 866-239-5777
- Tel: 516-239-5777
- Fax: 516-239-7208
- Email: sales@signaltransformer.com | techhelp@signaltransformer.com
2411272143_Bel-Fuse-ST-4-56_C17572669.pdf
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