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Specifications
Secondary Winding:
2
Isolation Voltage(Vrms):
2.5kV
Primary Winding(s):
1
Secondary Side Voltage:
24V;48V
Output Current:
100mA;50mA
Primary Side Voltage:
115V
Mfr. Part #:
ST-3-48
Package:
Through Hole-6P,34.9x28.6mm
Key Attributes
Model Number:
ST-3-48
Product Description
Bel Fuse Signal ST/DST Series Split/Tran Specialty Purpose & Class 2 Transformers
Product Overview
The Bel Fuse Signal ST and DST Series Split/Tran transformers are specialty purpose and Class 2 transformers designed for printed circuit board mounting. Utilizing a dual cavity platform, these transformers offer superior isolation and low capacitive coupling. Their rigid pin construction facilitates easier board insertion and enhances reliability. These transformers are suitable for a wide range of applications requiring reliable power conversion with high isolation.
Product Attributes
- Brand: Bel Fuse Signal
- Series: ST / DST Series
- Construction: Split Bobbin
- 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 - see recommended fuse rating table.
- (#) UL Recognized UL5085-3, Inherently Limited File # E116583
Technical Specifications
| Part Number | Secondary RMS Rating | Power (VA) | Size (L x W x H mm) | Weight (kg) | Mounting Holes (ML x A x B x C mm) |
|---|---|---|---|---|---|
| ST-2-10**# / DST-2-10**# | 10 VCT @ 0.11 A / 5 V @ 0.22 A | 1.1 | 34.9 x 28.6 x 24.6 | 0.08 | - x 6.4 x 6.4 x 30.5 |
| ST-3-10*# / DST-3-10*# | 10 VCT @ 0.25 A (5) / 5 V @ 0.5 A (9) | 2.4 | 34.9 x 28.6 x 30.8 | 0.11 | - x 6.4 x 6.4 x 30.5 |
| ST-4-10*# / DST-4-10*# | 10 VCT @ 0.6 A (9) / 5 V @ 1.2 A (11) | 6 | 41.3 x 33.3 x 33.3 | 0.20 | 26.9 x 6.4 x 8.9 x 31.8 |
| ST-5-10*# / DST-5-10*# | 10 VCT @ 1.2 A (11) / 5 V @ 2.4 A (13) | 12 | 48.4 x 40.4 x 36.9 | 0.32 | 31.8 x 7.6 x 10.2 x 35.8 |
| ST-6-10 / DST-6-10 | 10 VCT @ 2.0 A / 5 V @ 4.0 A | 20 | 57.2 x 47.8 x 36.9 | 0.36 | 38.1 x 7.6 x 10.2 x 40.6 |
| ST-7-10 / DST-7-10 | 10 VCT @ 3.6 A / 5 V @ 7.2 A | 36 | 66.7 x 55.5 x 40.4 | 0.50 | 10.2 x 10.2 x 47.0 |
| ST-2-12**# / DST-2-12**# | 12.6 VCT @ 0.09 A / 6.3 V @ 0.18 A | 1.1 | 34.9 x 28.6 x 24.6 | 0.08 | - x 6.4 x 6.4 x 30.5 |
| ST-3-12*# / DST-3-12*# | 12.6 VCT @ 0.2 A (4) / 6.3 V @ 0.4 A (8) | 2.4 | 34.9 x 28.6 x 30.8 | 0.11 | - x 6.4 x 6.4 x 30.5 |
| ST-4-12*# / DST-4-12*# | 12.6 VCT @ 0.5 A (9) / 6.3 V @ 1.0 A (11) | 6 | 41.3 x 33.3 x 33.3 | 0.20 | 26.9 x 6.4 x 8.9 x 31.8 |
| ST-5-12*# / DST-5-12*# | 12.6 VCT @ 1.0 A (11) / 6.3 V @ 2.0 A (13) | 12 | 48.4 x 40.4 x 36.9 | 0.32 | 31.8 x 7.6 x 10.2 x 35.8 |
| ST-6-12 / DST-6-12 | 12.6 VCT @ 1.6 A / 6.3 V @ 3.2 A | 20 | 57.2 x 47.8 x 36.9 | 0.36 | 38.1 x 7.6 x 10.2 x 40.6 |
| ST-7-12 / DST-7-12 | 12.6 VCT @ 2.85 A / 6.3 V @ 5.7 A | 36 | 66.7 x 55.5 x 40.4 | 0.50 | 10.2 x 10.2 x 47.0 |
| ST-2-16**# / DST-2-16**# | 16 VCT @ 0.07 A / 8 V @ 0.14 A | 1.1 | 34.9 x 28.6 x 24.6 | 0.08 | - x 6.4 x 6.4 x 30.5 |
| ST-3-16*# / DST-3-16*# | 16 VCT @ 0.15 A (3) / 8 V @ 0.3 A (6) | 2.4 | 34.9 x 28.6 x 30.8 | 0.11 | - x 6.4 x 6.4 x 30.5 |
| ST-4-16*# / DST-4-16*# | 16 VCT @ 0.4 A (7) / 8 V @ 0.8 A (10) | 6 | 41.3 x 33.3 x 33.3 | 0.20 | 26.9 x 6.4 x 8.9 x 31.8 |
| ST-5-16*# / DST-5-16*# | 16 VCT @ 0.8 A (10) / 8 V @ 1.6 A (12) | 12 | 48.4 x 40.4 x 36.9 | 0.32 | 31.8 x 7.6 x 10.2 x 35.8 |
| ST-6-16 / DST-6-16 | 16 VCT @ 1.25 A / 8 V @ 2.5 A | 20 | 57.2 x 47.8 x 36.9 | 0.36 | 38.1 x 7.6 x 10.2 x 40.6 |
| ST-7-16 / DST-7-16 | 16 VCT @ 2.25 A / 8 V @ 4.5 A | 36 | 66.7 x 55.5 x 40.4 | 0.50 | 10.2 x 10.2 x 47.0 |
| ST-2-20**# / DST-2-20**# | 20 VCT @ 0.055 A / 10 V @ 0.11 A | 1.1 | 34.9 x 28.6 x 24.6 | 0.08 | - x 6.4 x 6.4 x 30.5 |
| ST-3-20*# / DST-3-20*# | 20 VCT @ 0.12 A (2) / 10 V @ 0.24 A (5) | 2.4 | 34.9 x 28.6 x 30.8 | 0.11 | - x 6.4 x 6.4 x 30.5 |
| ST-4-20*# / DST-4-20*# | 20 VCT @ 0.3 A (6) / 10 V @ 0.6 A (9) | 6 | 41.3 x 33.3 x 33.3 | 0.20 | 26.9 x 6.4 x 8.9 x 31.8 |
| ST-5-20*# / DST-5-20*# | 20 VCT @ 0.6 A (9) / 10 V @ 1.2 A (11) | 12 | 48.4 x 40.4 x 36.9 | 0.32 | 31.8 x 7.6 x 10.2 x 35.8 |
| ST-6-20 / DST-6-20 | 20 VCT @ 1.0 A / 10 V @ 2.0 A | 20 | 57.2 x 47.8 x 36.9 | 0.36 | 38.1 x 7.6 x 10.2 x 40.6 |
| ST-7-20 / DST-7-20 | 20 VCT @ 1.8 A / 10 V @ 3.6 A | 36 | 66.7 x 55.5 x 40.4 | 0.50 | 10.2 x 10.2 x 47.0 |
| ST-2-24**# / DST-2-24**# | 24 VCT @ 0.045 A / 12 V @ 0.09 A | 1.1 | 34.9 x 28.6 x 24.6 | 0.08 | - x 6.4 x 6.4 x 30.5 |
| ST-3-24*# / DST-3-24*# | 24 VCT @ 0.1 A (1) / 12 V @ 0.2 A (4) | 2.4 | 34.9 x 28.6 x 30.8 | 0.11 | - x 6.4 x 6.4 x 30.5 |
| ST-4-24*# / DST-4-24*# | 24 VCT @ 0.25 A (5) / 12 V @ 0.5 A (9) | 6 | 41.3 x 33.3 x 33.3 | 0.20 | 26.9 x 6.4 x 8.9 x 31.8 |
| ST-5-24*# / DST-5-24*# | 24 VCT @ 0.5 A (9) / 12 V @ 1.0 A (11) | 12 | 48.4 x 40.4 x 36.9 | 0.32 | 31.8 x 7.6 x 10.2 x 35.8 |
| ST-6-24 / DST-6-24 | 24 VCT @ 0.8 A / 12 V @ 1.6 A | 20 | 57.2 x 47.8 x 36.9 | 0.36 | 38.1 x 7.6 x 10.2 x 40.6 |
| ST-7-24 / DST-7-24 | 24 VCT @ 1.5 A / 12 V @ 3.0 A | 36 | 66.7 x 55.5 x 40.4 | 0.50 | 10.2 x 10.2 x 47.0 |
| ST-2-28 / DST-2-28 | 28 VCT @ 0.04 A / 14 V @ 0.08 A | 1.1 | 34.9 x 28.6 x 24.6 | 0.08 | - x 6.4 x 6.4 x 30.5 |
| ST-3-28 / DST-3-28 | 28 VCT @ 0.085 A / 14 V @ 0.17 A | 2.4 | 34.9 x 28.6 x 30.8 | 0.11 | - x 6.4 x 6.4 x 30.5 |
| ST-4-28 / DST-4-28 | 28 VCT @ 0.2 A / 14 V @ 0.4 A | 6 | 41.3 x 33.3 x 33.3 | 0.20 | 26.9 x 6.4 x 8.9 x 31.8 |
| ST-5-28 / DST-5-28 | 28 VCT @ 0.42 A / 14 V @ 0.84 A | 12 | 48.4 x 40.4 x 36.9 | 0.32 | 31.8 x 7.6 x 10.2 x 35.8 |
| ST-6-28 / DST-6-28 | 28 VCT @ 0.7 A / 14 V @ 1.4 A | 20 | 57.2 x 47.8 x 36.9 | 0.36 | 38.1 x 7.6 x 10.2 x 40.6 |
| ST-7-28 / DST-7-28 | 28 VCT @ 1.3 A / 14 V @ 2.6 A | 36 | 66.7 x 55.5 x 40.4 | 0.50 | 10.2 x 10.2 x 47.0 |
| ST-2-36 / DST-2-36 | 36 VCT @ 0.03 A / 18 V @ 0.06 A | 1.1 | 34.9 x 28.6 x 24.6 | 0.08 | - x 6.4 x 6.4 x 30.5 |
| ST-3-36 / DST-3-36 | 36 VCT @ 0.065 A / 18 V @ 0.13 A | 2.4 | 34.9 x 28.6 x 30.8 | 0.11 | - x 6.4 x 6.4 x 30.5 |
| ST-4-36 / DST-4-36 | 36 VCT @ 0.17 A / 18 V @ 0.34 A | 6 | 41.3 x 33.3 x 33.3 | 0.20 | 26.9 x 6.4 x 8.9 x 31.8 |
| ST-5-36 / DST-5-36 | 36 VCT @ 0.35 A / 18 V @ 0.7 A | 12 | 48.4 x 40.4 x 36.9 | 0.32 | 31.8 x 7.6 x 10.2 x 35.8 |
| ST-6-36 / DST-6-36 | 36 VCT @ 0.55 A / 18 V @ 1.1 A | 20 | 57.2 x 47.8 x 36.9 | 0.36 | 38.1 x 7.6 x 10.2 x 40.6 |
| ST-7-36 / DST-7-36 | 36 VCT @ 1.0 A / 18 V @ 2.0 A | 36 | 66.7 x 55.5 x 40.4 | 0.50 | 10.2 x 10.2 x 47.0 |
| ST-2-48 / DST-2-48 | 48 VCT @ 0.023 A / 24 V @ 0.046 A | 1.1 | 34.9 x 28.6 x 24.6 | 0.08 | - x 6.4 x 6.4 x 30.5 |
| ST-3-48 / DST-3-48 | 48 VCT @ 0.05 A / 24 V @ 0.1 A | 2.4 | 34.9 x 28.6 x 30.8 | 0.11 | - x 6.4 x 6.4 x 30.5 |
| ST-4-48 / DST-4-48 | 48 VCT @ 0.125 A / 24 V @ 0.25 A | 6 | 41.3 x 33.3 x 33.3 | 0.20 | 26.9 x 6.4 x 8.9 x 31.8 |
| ST-5-48 / DST-5-48 | 48 VCT @ 0.25 A / 24 V @ 0.5 A | 12 | 48.4 x 40.4 x 36.9 | 0.32 | 31.8 x 7.6 x 10.2 x 35.8 |
| ST-6-48 / DST-6-48 | 48 VCT @ 0.4 A / 24 V @ 0.8 A | 20 | 57.2 x 47.8 x 36.9 | 0.36 | 38.1 x 7.6 x 10.2 x 40.6 |
| ST-7-48 / DST-7-48 | 48 VCT @ 0.75 A / 24 V @ 1.5 A | 36 | 66.7 x 55.5 x 40.4 | 0.50 | 10.2 x 10.2 x 47.0 |
| ST-2-56 / DST-2-56 | 56 VCT @ 0.02 A / 28 V @ 0.04 A | 1.1 | 34.9 x 28.6 x 24.6 | 0.08 | - x 6.4 x 6.4 x 30.5 |
| ST-3-56 / DST-3-56 | 56 VCT @ 0.045 A / 28 V @ 0.09 A | 2.4 | 34.9 x 28.6 x 30.8 | 0.11 | - x 6.4 x 6.4 x 30.5 |
| ST-4-56 / DST-4-56 | 56 VCT @ 0.11 A / 28 V @ 0.22 A | 6 | 41.3 x 33.3 x 33.3 | 0.20 | 26.9 x 6.4 x 8.9 x 31.8 |
| ST-5-56 / DST-5-56 | 56 VCT @ 0.22 A / 28 V @ 0.44 A | 12 | 48.4 x 40.4 x 36.9 | 0.32 | 31.8 x 7.6 x 10.2 x 35.8 |
| ST-6-56 / DST-6-56 | 56 VCT @ 0.35 A / 28 V @ 0.7 A | 20 | 57.2 x 47.8 x 36.9 | 0.36 | 38.1 x 7.6 x 10.2 x 40.6 |
| ST-7-56 / DST-7-56 | 56 VCT @ 0.65A / 28 V @ 1.3 A | 36 | 66.7 x 55.5 x 40.4 | 0.50 | 10.2 x 10.2 x 47.0 |
| ST-2-120 / DST-2-120 | 120 VCT @ 0.01 A / 60 V @ 0.02 A | 1.1 | 34.9 x 28.6 x 24.6 | 0.08 | - x 6.4 x 6.4 x 30.5 |
| ST-3-120 / DST-3-120 | 120 VCT @ 0.02 A / 60 V @ 0.04 A | 2.4 | 34.9 x 28.6 x 30.8 | 0.11 | - x 6.4 x 6.4 x 30.5 |
| ST-4-120 / DST-4-120 | 120 VCT @ 0.05 A / 60 V @ 0.1 A | 6 | 41.3 x 33.3 x 33.3 | 0.20 | 26.9 x 6.4 x 8.9 x 31.8 |
| ST-5-120 / DST-5-120 | 120 VCT @ 0.1 A / 60 V @ 0.2 A | 12 | 48.4 x 40.4 x 36.9 | 0.32 | 31.8 x 7.6 x 10.2 x 35.8 |
| ST-6-120 / DST-6-120 | 120 VCT @ 0.16 A / 60 V @ 0.32 A | 20 | 57.2 x 47.8 x 36.9 | 0.36 | 38.1 x 7.6 x 10.2 x 40.6 |
| ST-7-120 / DST-7-120 | 120 VCT @ 0.3 A / 60 V @ 0.6 A | 36 | 66.7 x 55.5 x 40.4 | 0.50 | 10.2 x 10.2 x 47.0 |
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 (Optional Mounting Screw & Nut available from Signal, part numbers ST-MS (screw) and ST-MN (nut)). Size 7 has 4 mounting holes on 2.18 x 1.75 centers for #6 screws.
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:
Bel Fuse Signal
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
Custom versions available upon request. 2020 Signal Transformer. Specifications subject to change without notice.
2411272143_Bel-Fuse-ST-3-48_C17509163.pdf
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