Product Overview
The Signal ST/DST Series Split/Tran Specialty Purpose & Class 2 Transformers are designed for applications requiring high isolation and low capacitive coupling. Utilizing a split bobbin construction with dual cavities, these transformers offer superior performance. They feature rigid pin construction for enhanced board insertion reliability and are available in various power ratings from 1.1 VA to 36 VA. Suitable for a wide range of signal and power applications, these transformers are built to meet stringent industry standards.
Product Attributes
- Brand: Signal Transformer (belfuse.com/signal)
- 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
- Customization: Custom versions available upon request.
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 | 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) | (See notes) | 0.40 (10.2) | 0.40 (10.2) | 1.85 (47.0) | (See notes) | 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 configurations available
- Electrostatic Shield: Not necessary due to split bobbin construction
Part Number Selection Examples (ST - Single Primary, DST - Dual Primary):
| Part Number | Secondary RMS Rating (Series) | Secondary RMS Rating (Parallel) | Primary Type | Pins |
|---|---|---|---|---|
| ST-2-10**# / DST-2-10**# | 10 VCT @ 0.11 A | 5 V @ 0.22 A | 115 V (ST) / 115/230 V (DST) | 6 (ST) / 8 (DST) |
| ST-3-10*# / DST-3-10*# | 10 VCT @ 0.25 A | 5 V @ 0.5 A | 115 V (ST) / 115/230 V (DST) | 6 (ST) / 8 (DST) |
| ST-7-36 / DST-7-36 | 36 VCT @ 1.0 A | 18 V @ 2.0 A | 115 V (ST) / 115/230 V (DST) | 6 (ST) / 8 (DST) |
| ST-7-120 / DST-7-120 | 120 VCT @ 0.3 A | 60 V @ 0.6 A | 115 V (ST) / 115/230 V (DST) | 6 (ST) / 8 (DST) |
Note on Part Number Suffixes:
- ** CSA certified as Inherently Limited
- * CSA certified as Non Inherently Limited (see recommended fuse rating table)
- # UL Recognized UL5085-3, Inherently Limited
Recommended Secondary Fuse Values (Referenced by numbers in Part Number Selection table):
(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
Size 7 Mounting: Has 4 mounting holes on 2.18 x 1.75 centers for #6 screws. Mounting screw (ST-MS) and nut (ST-MN) are available from Signal.
2411272143_Bel-Fuse-DST-5-20_C17288563.pdf
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