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Specifications
Secondary Winding:
2
Isolation Voltage(Vrms):
2.5kV
Primary Winding(s):
1
Secondary Side Voltage:
12V;24V
Output Current:
200mA;100mA
Primary Side Voltage:
115V
Mfr. Part #:
ST-3-24
Package:
Through Hole-6P,34.9x28.6mm
Key Attributes
Model Number:
ST-3-24
Product Description
Product Overview
The Signal ST/DST Series Split/Tran Specialty Purpose & Class 2 Transformers are designed for high isolation and low capacitive coupling, utilizing a dual cavity platform. These split bobbin transformers feature rigid pin construction for enhanced board insertion and reliability. They 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. The series is UL and CSA certified and RoHS compliant.
Product Attributes
- Brand: Signal Transformer
- Series: ST / DST Series Split/Tran
- Construction: Split Bobbin with Dual Cavity
- Isolation: Superior isolation and low capacitive coupling
- Pin Construction: Rigid for easier board insertion and higher reliability
- Insulation System: Class F, 155 C
- RoHS Compliant: Yes
- 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
| Part Number | Secondary RMS Rating | VA | Size (L x W x H) Inches (mm) | Weight lbs (kg) |
|---|---|---|---|---|
| ST-2-10**# / DST-2-10**# | 10 VCT @ 0.11 A / 5 V @ 0.22 A | 1.1 | 1.37 x 1.12 x 0.97 (34.9 x 28.6 x 24.6) | 0.17 (0.08) |
| ST-3-10*# / DST-3-10*# | 10 VCT @ 0.25 A (5) / 5 V @ 0.5 A (9) | 2.4 | 1.37 x 1.12 x 1.21 (34.9 x 28.6 x 30.8) | 0.25 (0.11) |
| ST-4-10*# / DST-4-10*# | 10 VCT @ 0.6 A (9) / 5 V @ 1.2 A (11) | 6 | 1.62 x 1.31 x 1.31 (41.3 x 33.3 x 33.3) | 0.44 (0.20) |
| ST-5-10*# / DST-5-10*# | 10 VCT @ 1.2 A (11) / 5 V @ 2.4 A (13) | 12 | 1.91 x 1.59 x 1.45 (48.4 x 40.4 x 36.9) | 0.70 (0.32) |
| ST-6-10 / DST-6-10 | 10 VCT @ 2.0 A / 5 V @ 4.0 A | 20 | 2.25 x 1.88 x 1.45 (57.2 x 47.8 x 36.9) | 0.80 (0.36) |
| ST-7-10 / DST-7-10 | 10 VCT @ 3.6 A / 5 V @ 7.2 A | 36 | 2.62 x 2.18 x 1.59 (66.7 x 55.5 x 40.4) | 1.1 (0.50) |
| ST-2-12**# / DST-2-12**# | 12.6 VCT @ 0.09 A / 6.3 V @ 0.18 A | 1.1 | 1.37 x 1.12 x 0.97 (34.9 x 28.6 x 24.6) | 0.17 (0.08) |
| ST-3-12*# / DST-3-12*# | 12.6 VCT @ 0.2 A (4) / 6.3 V @ 0.4 A (8) | 2.4 | 1.37 x 1.12 x 1.21 (34.9 x 28.6 x 30.8) | 0.25 (0.11) |
| ST-4-12*# / DST-4-12*# | 12.6 VCT @ 0.5 A (9) / 6.3 V @ 1.0 A (11) | 6 | 1.62 x 1.31 x 1.31 (41.3 x 33.3 x 33.3) | 0.44 (0.20) |
| ST-5-12*# / DST-5-12*# | 12.6 VCT @ 1.0 A (11) / 6.3 V @ 2.0 A (13) | 12 | 1.91 x 1.59 x 1.45 (48.4 x 40.4 x 36.9) | 0.70 (0.32) |
| ST-6-12 / DST-6-12 | 12.6 VCT @ 1.6 A / 6.3 V @ 3.2 A | 20 | 2.25 x 1.88 x 1.45 (57.2 x 47.8 x 36.9) | 0.80 (0.36) |
| ST-7-12 / DST-7-12 | 12.6 VCT @ 2.85 A / 6.3 V @ 5.7 A | 36 | 2.62 x 2.18 x 1.59 (66.7 x 55.5 x 40.4) | 1.1 (0.50) |
| ST-2-16**# / DST-2-16**# | 16 VCT @ 0.07 A / 8 V @ 0.14 A | 1.1 | 1.37 x 1.12 x 0.97 (34.9 x 28.6 x 24.6) | 0.17 (0.08) |
| ST-3-16*# / DST-3-16*# | 16 VCT @ 0.15 A (3) / 8 V @ 0.3 A (6) | 2.4 | 1.37 x 1.12 x 1.21 (34.9 x 28.6 x 30.8) | 0.25 (0.11) |
| ST-4-16*# / DST-4-16*# | 16 VCT @ 0.4 A (7) / 8 V @ 0.8 A (10) | 6 | 1.62 x 1.31 x 1.31 (41.3 x 33.3 x 33.3) | 0.44 (0.20) |
| ST-5-16*# / DST-5-16*# | 16 VCT @ 0.8 A (10) / 8 V @ 1.6 A (12) | 12 | 1.91 x 1.59 x 1.45 (48.4 x 40.4 x 36.9) | 0.70 (0.32) |
| ST-6-16 / DST-6-16 | 16 VCT @ 1.25 A / 8 V @ 2.5 A | 20 | 2.25 x 1.88 x 1.45 (57.2 x 47.8 x 36.9) | 0.80 (0.36) |
| ST-7-16 / DST-7-16 | 16 VCT @ 2.25 A / 8 V @ 4.5 A | 36 | 2.62 x 2.18 x 1.59 (66.7 x 55.5 x 40.4) | 1.1 (0.50) |
| ST-2-20**# / DST-2-20**# | 20 VCT @ 0.055 A / 10 V @ 0.11 A | 1.1 | 1.37 x 1.12 x 0.97 (34.9 x 28.6 x 24.6) | 0.17 (0.08) |
| ST-3-20*# / DST-3-20*# | 20 VCT @ 0.12 A (2) / 10 V @ 0.24 A (5) | 2.4 | 1.37 x 1.12 x 1.21 (34.9 x 28.6 x 30.8) | 0.25 (0.11) |
| ST-4-20*# / DST-4-20*# | 20 VCT @ 0.3 A (6) / 10 V @ 0.6 A (9) | 6 | 1.62 x 1.31 x 1.31 (41.3 x 33.3 x 33.3) | 0.44 (0.20) |
| ST-5-20*# / DST-5-20*# | 20 VCT @ 0.6 A (9) / 10 V @ 1.2 A (11) | 12 | 1.91 x 1.59 x 1.45 (48.4 x 40.4 x 36.9) | 0.70 (0.32) |
| ST-6-20 / DST-6-20 | 20 VCT @ 1.0 A / 10 V @ 2.0 A | 20 | 2.25 x 1.88 x 1.45 (57.2 x 47.8 x 36.9) | 0.80 (0.36) |
| ST-7-20 / DST-7-20 | 20 VCT @ 1.8 A / 10 V @ 3.6 A | 36 | 2.62 x 2.18 x 1.59 (66.7 x 55.5 x 40.4) | 1.1 (0.50) |
| ST-2-24**# / DST-2-24**# | 24 VCT @ 0.045 A / 12 V @ 0.09 A | 1.1 | 1.37 x 1.12 x 0.97 (34.9 x 28.6 x 24.6) | 0.17 (0.08) |
| ST-3-24*# / DST-3-24*# | 24 VCT @ 0.1 A (1) / 12 V @ 0.2 A (4) | 2.4 | 1.37 x 1.12 x 1.21 (34.9 x 28.6 x 30.8) | 0.25 (0.11) |
| ST-4-24*# / DST-4-24*# | 24 VCT @ 0.25 A (5) / 12 V @ 0.5 A (9) | 6 | 1.62 x 1.31 x 1.31 (41.3 x 33.3 x 33.3) | 0.44 (0.20) |
| ST-5-24*# / DST-5-24*# | 24 VCT @ 0.5 A (9) / 12 V @ 1.0 A (11) | 12 | 1.91 x 1.59 x 1.45 (48.4 x 40.4 x 36.9) | 0.70 (0.32) |
| ST-6-24 / DST-6-24 | 24 VCT @ 0.8 A / 12 V @ 1.6 A | 20 | 2.25 x 1.88 x 1.45 (57.2 x 47.8 x 36.9) | 0.80 (0.36) |
| ST-7-24 / DST-7-24 | 24 VCT @ 1.5 A / 12 V @ 3.0 A | 36 | 2.62 x 2.18 x 1.59 (66.7 x 55.5 x 40.4) | 1.1 (0.50) |
| ST-2-28 / DST-2-28 | 28 VCT @ 0.04 A / 14 V @ 0.08 A | 1.1 | 1.37 x 1.12 x 0.97 (34.9 x 28.6 x 24.6) | 0.17 (0.08) |
| ST-3-28 / DST-3-28 | 28 VCT @ 0.085 A / 14 V @ 0.17 A | 2.4 | 1.37 x 1.12 x 1.21 (34.9 x 28.6 x 30.8) | 0.25 (0.11) |
| ST-4-28 / DST-4-28 | 28 VCT @ 0.2 A / 14 V @ 0.4 A | 6 | 1.62 x 1.31 x 1.31 (41.3 x 33.3 x 33.3) | 0.44 (0.20) |
| ST-5-28 / DST-5-28 | 28 VCT @ 0.42 A / 14 V @ 0.84 A | 12 | 1.91 x 1.59 x 1.45 (48.4 x 40.4 x 36.9) | 0.70 (0.32) |
| ST-6-28 / DST-6-28 | 28 VCT @ 0.7 A / 14 V @ 1.4 A | 20 | 2.25 x 1.88 x 1.45 (57.2 x 47.8 x 36.9) | 0.80 (0.36) |
| ST-7-28 / DST-7-28 | 28 VCT @ 1.3 A / 14 V @ 2.6 A | 36 | 2.62 x 2.18 x 1.59 (66.7 x 55.5 x 40.4) | 1.1 (0.50) |
| ST-2-36 / DST-2-36 | 36 VCT @ 0.03 A / 18 V @ 0.06 A | 1.1 | 1.37 x 1.12 x 0.97 (34.9 x 28.6 x 24.6) | 0.17 (0.08) |
| ST-3-36 / DST-3-36 | 36 VCT @ 0.065 A / 18 V @ 0.13 A | 2.4 | 1.37 x 1.12 x 1.21 (34.9 x 28.6 x 30.8) | 0.25 (0.11) |
| ST-4-36 / DST-4-36 | 36 VCT @ 0.17 A / 18 V @ 0.34 A | 6 | 1.62 x 1.31 x 1.31 (41.3 x 33.3 x 33.3) | 0.44 (0.20) |
| ST-5-36 / DST-5-36 | 36 VCT @ 0.35 A / 18 V @ 0.7 A | 12 | 1.91 x 1.59 x 1.45 (48.4 x 40.4 x 36.9) | 0.70 (0.32) |
| ST-6-36 / DST-6-36 | 36 VCT @ 0.55 A / 18 V @ 1.1 A | 20 | 2.25 x 1.88 x 1.45 (57.2 x 47.8 x 36.9) | 0.80 (0.36) |
| ST-7-36 / DST-7-36 | 36 VCT @ 1.0 A / 18 V @ 2.0 A | 36 | 2.62 x 2.18 x 1.59 (66.7 x 55.5 x 40.4) | 1.1 (0.50) |
| ST-2-48 / DST-2-48 | 48 VCT @ 0.023 A / 24 V @ 0.046 A | 1.1 | 1.37 x 1.12 x 0.97 (34.9 x 28.6 x 24.6) | 0.17 (0.08) |
| ST-3-48 / DST-3-48 | 48 VCT @ 0.05 A / 24 V @ 0.1 A | 2.4 | 1.37 x 1.12 x 1.21 (34.9 x 28.6 x 30.8) | 0.25 (0.11) |
| ST-4-48 / DST-4-48 | 48 VCT @ 0.125 A / 24 V @ 0.25 A | 6 | 1.62 x 1.31 x 1.31 (41.3 x 33.3 x 33.3) | 0.44 (0.20) |
| ST-5-48 / DST-5-48 | 48 VCT @ 0.25 A / 24 V @ 0.5 A | 12 | 1.91 x 1.59 x 1.45 (48.4 x 40.4 x 36.9) | 0.70 (0.32) |
| ST-6-48 / DST-6-48 | 48 VCT @ 0.4 A / 24 V @ 0.8 A | 20 | 2.25 x 1.88 x 1.45 (57.2 x 47.8 x 36.9) | 0.80 (0.36) |
| ST-7-48 / DST-7-48 | 48 VCT @ 0.75 A / 24 V @ 1.5 A | 36 | 2.62 x 2.18 x 1.59 (66.7 x 55.5 x 40.4) | 1.1 (0.50) |
| ST-2-56 / DST-2-56 | 56 VCT @ 0.02 A / 28 V @ 0.04 A | 1.1 | 1.37 x 1.12 x 0.97 (34.9 x 28.6 x 24.6) | 0.17 (0.08) |
| ST-3-56 / DST-3-56 | 56 VCT @ 0.045 A / 28 V @ 0.09 A | 2.4 | 1.37 x 1.12 x 1.21 (34.9 x 28.6 x 30.8) | 0.25 (0.11) |
| ST-4-56 / DST-4-56 | 56 VCT @ 0.11 A / 28 V @ 0.22 A | 6 | 1.62 x 1.31 x 1.31 (41.3 x 33.3 x 33.3) | 0.44 (0.20) |
| ST-5-56 / DST-5-56 | 56 VCT @ 0.22 A / 28 V @ 0.44 A | 12 | 1.91 x 1.59 x 1.45 (48.4 x 40.4 x 36.9) | 0.70 (0.32) |
| ST-6-56 / DST-6-56 | 56 VCT @ 0.35 A / 28 V @ 0.7 A | 20 | 2.25 x 1.88 x 1.45 (57.2 x 47.8 x 36.9) | 0.80 (0.36) |
| ST-7-56 / DST-7-56 | 56 VCT @ 0.65A / 28 V @ 1.3 A | 36 | 2.62 x 2.18 x 1.59 (66.7 x 55.5 x 40.4) | 1.1 (0.50) |
| ST-2-120 / DST-2-120 | 120 VCT @ 0.01 A / 60 V @ 0.02 A | 1.1 | 1.37 x 1.12 x 0.97 (34.9 x 28.6 x 24.6) | 0.17 (0.08) |
| ST-3-120 / DST-3-120 | 120 VCT @ 0.02 A / 60 V @ 0.04 A | 2.4 | 1.37 x 1.12 x 1.21 (34.9 x 28.6 x 30.8) | 0.25 (0.11) |
| ST-4-120 / DST-4-120 | 120 VCT @ 0.05 A / 60 V @ 0.1 A | 6 | 1.62 x 1.31 x 1.31 (41.3 x 33.3 x 33.3) | 0.44 (0.20) |
| ST-5-120 / DST-5-120 | 120 VCT @ 0.1 A / 60 V @ 0.2 A | 12 | 1.91 x 1.59 x 1.45 (48.4 x 40.4 x 36.9) | 0.70 (0.32) |
| ST-6-120 / DST-6-120 | 120 VCT @ 0.16 A / 60 V @ 0.32 A | 20 | 2.25 x 1.88 x 1.45 (57.2 x 47.8 x 36.9) | 0.80 (0.36) |
| ST-7-120 / DST-7-120 | 120 VCT @ 0.3 A / 60 V @ 0.6 A | 36 | 2.62 x 2.18 x 1.59 (66.7 x 55.5 x 40.4) | 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 | |||
| Insulation System | Class F, 155 C | |||
| Mounting Hardware | See chart (ST-MS screw, ST-MN nut available from Signal) | |||
| Size 7 Mounting | 4 mounting holes on 2.18 x 1.75 centers for #6 screws. | |||
| Recommended Secondary Fuse Values | 0.125 A, 0.15 A, 0.25 A, 0.3 A, 0.375 A, 0.4 A, 0.5 A, 0.6 A, 0.75 A, 1.0 A, 1.5 A, 2.0 A, 3.0 A (Refer to specific part number for applicable fuse rating) | |||
2411272143_Bel-Fuse-ST-3-24_C17196252.pdf
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