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Specifications
Secondary Winding:
2
Isolation Voltage(Vrms):
2.5kV
Primary Winding(s):
1
Secondary Side Voltage:
28V;56V
Output Current:
700mA;350mA
Primary Side Voltage:
115V
Mfr. Part #:
ST-6-56
Package:
Through Hole-6P,57.2x47.6mm
Key Attributes
Model Number:
ST-6-56
Product Description
Product Overview
The Signal ST and DST Series Split/Tran Specialty Purpose & Class 2 Transformers are designed for printed circuit board mounting. They utilize a dual cavity platform that provides superior isolation and low capacitive coupling. The rigid pin construction facilitates easier board insertion and enhances reliability. These transformers are suitable for a wide range of power applications, from 1.1 VA to 36 VA, and are available in single or dual primary configurations with various secondary voltage and current ratings. They are built with a Class F insulation system (155 C) and meet stringent agency certifications for safety and performance.
Product Attributes
- Brand: Signal Transformer
- Series: ST / DST Series Split/Tran
- Construction: Split Bobbin with Dual Cavity
- Pin Construction: Rigid
- Insulation System: Class F (155 C)
- RoHS Compliant: Yes
- Agency 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)
- Customization: Custom versions available upon request.
Technical Specifications
| Product Description | Power (VA) | Dielectric Strength (Vrms Hipot) | Primary Options | Secondary Options | Insulation System | Mounting Hardware | Weight (lbs / kg) |
|---|---|---|---|---|---|---|---|
| ST/DST Series Split Bobbin Transformers | 1.1 to 36 | 2500 | Single or dual primaries, 115 V or 115/230 V, 50/60 Hz | Series or parallel | Class F, 155 C | See chart for details. Size 7 has 4 mounting holes on 2.18 x 1.75 centers for #6 screws. Optional mounting screw & nut available (ST-MS, ST-MN). | 0.17 (0.08) to 1.1 (0.50) |
Model Selection & Ratings
| Part Number | Secondary RMS Rating (Series) | Secondary RMS Rating (Parallel) | VA Rating | Pin Configuration | Class 2 Marking |
|---|---|---|---|---|---|
| ST-2-10**# / DST-2-10**# | 10 VCT @ 0.11 A | 5 V @ 0.22 A | 2.2 | 6 Pin (ST) / 8 Pin (DST) | **# |
| ST-3-10*# / DST-3-10*# | 10 VCT @ 0.25 A | 5 V @ 0.5 A | 5 | 6 Pin (ST) / 8 Pin (DST) | *# |
| ST-4-10*# / DST-4-10*# | 10 VCT @ 0.6 A | 5 V @ 1.2 A | 12 | 6 Pin (ST) / 8 Pin (DST) | *# |
| ST-5-10*# / DST-5-10*# | 10 VCT @ 1.2 A | 5 V @ 2.4 A | 24 | 6 Pin (ST) / 8 Pin (DST) | *# |
| ST-6-10 / DST-6-10 | 10 VCT @ 2.0 A | 5 V @ 4.0 A | 40 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-7-10 / DST-7-10 | 10 VCT @ 3.6 A | 5 V @ 7.2 A | 72 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-2-12**# / DST-2-12**# | 12.6 VCT @ 0.09 A | 6.3 V @ 0.18 A | 2.2 | 6 Pin (ST) / 8 Pin (DST) | **# |
| ST-3-12*# / DST-3-12*# | 12.6 VCT @ 0.2 A | 6.3 V @ 0.4 A | 5 | 6 Pin (ST) / 8 Pin (DST) | *# |
| ST-4-12*# / DST-4-12*# | 12.6 VCT @ 0.5 A | 6.3 V @ 1.0 A | 12 | 6 Pin (ST) / 8 Pin (DST) | *# |
| ST-5-12*# / DST-5-12*# | 12.6 VCT @ 1.0 A | 6.3 V @ 2.0 A | 24 | 6 Pin (ST) / 8 Pin (DST) | *# |
| ST-6-12 / DST-6-12 | 12.6 VCT @ 1.6 A | 6.3 V @ 3.2 A | 40 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-7-12 / DST-7-12 | 12.6 VCT @ 2.85 A | 6.3 V @ 5.7 A | 72 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-2-16**# / DST-2-16**# | 16 VCT @ 0.07 A | 8 V @ 0.14 A | 2.2 | 6 Pin (ST) / 8 Pin (DST) | **# |
| ST-3-16*# / DST-3-16*# | 16 VCT @ 0.15 A | 8 V @ 0.3 A | 5 | 6 Pin (ST) / 8 Pin (DST) | *# |
| ST-4-16*# / DST-4-16*# | 16 VCT @ 0.4 A | 8 V @ 0.8 A | 12 | 6 Pin (ST) / 8 Pin (DST) | *# |
| ST-5-16*# / DST-5-16*# | 16 VCT @ 0.8 A | 8 V @ 1.6 A | 24 | 6 Pin (ST) / 8 Pin (DST) | *# |
| ST-6-16 / DST-6-16 | 16 VCT @ 1.25 A | 8 V @ 2.5 A | 40 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-7-16 / DST-7-16 | 16 VCT @ 2.25 A | 8 V @ 4.5 A | 72 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-2-20**# / DST-2-20**# | 20 VCT @ 0.055 A | 10 V @ 0.11 A | 2.2 | 6 Pin (ST) / 8 Pin (DST) | **# |
| ST-3-20*# / DST-3-20*# | 20 VCT @ 0.12 A | 10 V @ 0.24 A | 5 | 6 Pin (ST) / 8 Pin (DST) | *# |
| ST-4-20*# / DST-4-20*# | 20 VCT @ 0.3 A | 10 V @ 0.6 A | 12 | 6 Pin (ST) / 8 Pin (DST) | *# |
| ST-5-20*# / DST-5-20*# | 20 VCT @ 0.6 A | 10 V @ 1.2 A | 24 | 6 Pin (ST) / 8 Pin (DST) | *# |
| ST-6-20 / DST-6-20 | 20 VCT @ 1.0 A | 10 V @ 2.0 A | 40 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-7-20 / DST-7-20 | 20 VCT @ 1.8 A | 10 V @ 3.6 A | 72 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-2-24**# / DST-2-24**# | 24 VCT @ 0.045 A | 12 V @ 0.09 A | 2.2 | 6 Pin (ST) / 8 Pin (DST) | **# |
| ST-3-24*# / DST-3-24*# | 24 VCT @ 0.1 A | 12 V @ 0.2 A | 5 | 6 Pin (ST) / 8 Pin (DST) | *# |
| ST-4-24*# / DST-4-24*# | 24 VCT @ 0.25 A | 12 V @ 0.5 A | 12 | 6 Pin (ST) / 8 Pin (DST) | *# |
| ST-5-24*# / DST-5-24*# | 24 VCT @ 0.5 A | 12 V @ 1.0 A | 24 | 6 Pin (ST) / 8 Pin (DST) | *# |
| ST-6-24 / DST-6-24 | 24 VCT @ 0.8 A | 12 V @ 1.6 A | 40 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-7-24 / DST-7-24 | 24 VCT @ 1.5 A | 12 V @ 3.0 A | 72 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-2-28 / DST-2-28 | 28 VCT @ 0.04 A | 14 V @ 0.08 A | 2.2 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-3-28 / DST-3-28 | 28 VCT @ 0.085 A | 14 V @ 0.17 A | 5 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-4-28 / DST-4-28 | 28 VCT @ 0.2 A | 14 V @ 0.4 A | 12 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-5-28 / DST-5-28 | 28 VCT @ 0.42 A | 14 V @ 0.84 A | 24 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-6-28 / DST-6-28 | 28 VCT @ 0.7 A | 14 V @ 1.4 A | 40 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-7-28 / DST-7-28 | 28 VCT @ 1.3 A | 14 V @ 2.6 A | 72 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-2-36 / DST-2-36 | 36 VCT @ 0.03 A | 18 V @ 0.06 A | 2.2 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-3-36 / DST-3-36 | 36 VCT @ 0.065 A | 18 V @ 0.13 A | 5 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-4-36 / DST-4-36 | 36 VCT @ 0.17 A | 18 V @ 0.34 A | 12 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-5-36 / DST-5-36 | 36 VCT @ 0.35 A | 18 V @ 0.7 A | 24 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-6-36 / DST-6-36 | 36 VCT @ 0.55 A | 18 V @ 1.1 A | 40 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-7-36 / DST-7-36 | 36 VCT @ 1.0 A | 18 V @ 2.0 A | 72 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-2-48 / DST-2-48 | 48 VCT @ 0.023 A | 24 V @ 0.046 A | 2.2 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-3-48 / DST-3-48 | 48 VCT @ 0.05 A | 24 V @ 0.1 A | 5 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-4-48 / DST-4-48 | 48 VCT @ 0.125 A | 24 V @ 0.25 A | 12 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-5-48 / DST-5-48 | 48 VCT @ 0.25 A | 24 V @ 0.5 A | 24 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-6-48 / DST-6-48 | 48 VCT @ 0.4 A | 24 V @ 0.8 A | 40 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-7-48 / DST-7-48 | 48 VCT @ 0.75 A | 24 V @ 1.5 A | 72 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-2-56 / DST-2-56 | 56 VCT @ 0.02 A | 28 V @ 0.04 A | 2.2 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-3-56 / DST-3-56 | 56 VCT @ 0.045 A | 28 V @ 0.09 A | 5 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-4-56 / DST-4-56 | 56 VCT @ 0.11 A | 28 V @ 0.22 A | 12 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-5-56 / DST-5-56 | 56 VCT @ 0.22 A | 28 V @ 0.44 A | 24 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-6-56 / DST-6-56 | 56 VCT @ 0.35 A | 28 V @ 0.7 A | 40 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-7-56 / DST-7-56 | 56 VCT @ 0.65 A | 28 V @ 1.3 A | 72 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-2-120 / DST-2-120 | 120 VCT @ 0.01 A | 60 V @ 0.02 A | 2.2 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-3-120 / DST-3-120 | 120 VCT @ 0.02 A | 60 V @ 0.04 A | 5 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-4-120 / DST-4-120 | 120 VCT @ 0.05 A | 60 V @ 0.1 A | 12 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-5-120 / DST-5-120 | 120 VCT @ 0.1 A | 60 V @ 0.2 A | 24 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-6-120 / DST-6-120 | 120 VCT @ 0.16 A | 60 V @ 0.32 A | 40 | 6 Pin (ST) / 8 Pin (DST) | - |
| ST-7-120 / DST-7-120 | 120 VCT @ 0.3 A | 60 V @ 0.6 A | 72 | 6 Pin (ST) / 8 Pin (DST) | - |
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) | Optional Mounting Screw & Nut | Weight (lbs/kg) |
|---|---|---|---|---|---|---|---|---|---|---|
| 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) | - | 0.17 (0.08) |
| 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) | - | 0.25 (0.11) |
| 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) | Nylon 4-40 x 1.37 (4-40 x 34.9) | 0.44 (0.20) |
| 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) | Nylon 4-40 x 1.37 (4-40 x 34.9) | 0.70 (0.32) |
| 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) | Nylon 4-40 x 1.37 (4-40 x 34.9) | 0.80 (0.36) |
| 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) | Available from Signal (ST-MS screw, ST-MN nut). 4 mounting holes on 2.18 x 1.75 centers for #6 screws. | 1.1 (0.50) |
Recommended Secondary Fuse Values
| Code | Fuse Value (A) |
|---|---|
| (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: CSA certified as Inherently Limited (*) or Non Inherently Limited (- see recommended fuse rating table). UL Recognized UL5085-3, Inherently Limited (#). See Accessories datasheet for mounting screw information.
2411272143_Bel-Fuse-ST-6-56_C17285884.pdf
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