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PCB mount transformer Bel Fuse ST-3-48 with split bobbin construction and Class 2 insulation system

PCB mount transformer Bel Fuse ST-3-48 with split bobbin construction and Class 2 insulation system

PCB mount transformer Bel Fuse ST-3-48 with split bobbin construction and Class 2 insulation system
PCB mount transformer Bel Fuse ST-3-48 with split bobbin construction and Class 2 insulation system
Categories Power Transformers
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
Description: 115V Through Hole-6P,34.9x28.6mm Power Transformers RoHS
Mfr. Part #: ST-3-48
Model Number: ST-3-48
Package: Through Hole-6P,34.9x28.6mm
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Changsha Purple Horn E-Commerce Co., Ltd.
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PCB mount transformer Bel Fuse ST-3-48 with split bobbin construction and Class 2 insulation system

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 NumberSecondary RMS RatingPower (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 A1.134.9 x 28.6 x 24.60.08- 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)2.434.9 x 28.6 x 30.80.11- 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)641.3 x 33.3 x 33.30.2026.9 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)1248.4 x 40.4 x 36.90.3231.8 x 7.6 x 10.2 x 35.8
ST-6-10 / DST-6-1010 VCT @ 2.0 A / 5 V @ 4.0 A2057.2 x 47.8 x 36.90.3638.1 x 7.6 x 10.2 x 40.6
ST-7-10 / DST-7-1010 VCT @ 3.6 A / 5 V @ 7.2 A3666.7 x 55.5 x 40.40.5010.2 x 10.2 x 47.0
ST-2-12**# / DST-2-12**#12.6 VCT @ 0.09 A / 6.3 V @ 0.18 A1.134.9 x 28.6 x 24.60.08- 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)2.434.9 x 28.6 x 30.80.11- 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)641.3 x 33.3 x 33.30.2026.9 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)1248.4 x 40.4 x 36.90.3231.8 x 7.6 x 10.2 x 35.8
ST-6-12 / DST-6-1212.6 VCT @ 1.6 A / 6.3 V @ 3.2 A2057.2 x 47.8 x 36.90.3638.1 x 7.6 x 10.2 x 40.6
ST-7-12 / DST-7-1212.6 VCT @ 2.85 A / 6.3 V @ 5.7 A3666.7 x 55.5 x 40.40.5010.2 x 10.2 x 47.0
ST-2-16**# / DST-2-16**#16 VCT @ 0.07 A / 8 V @ 0.14 A1.134.9 x 28.6 x 24.60.08- 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)2.434.9 x 28.6 x 30.80.11- 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)641.3 x 33.3 x 33.30.2026.9 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)1248.4 x 40.4 x 36.90.3231.8 x 7.6 x 10.2 x 35.8
ST-6-16 / DST-6-1616 VCT @ 1.25 A / 8 V @ 2.5 A2057.2 x 47.8 x 36.90.3638.1 x 7.6 x 10.2 x 40.6
ST-7-16 / DST-7-1616 VCT @ 2.25 A / 8 V @ 4.5 A3666.7 x 55.5 x 40.40.5010.2 x 10.2 x 47.0
ST-2-20**# / DST-2-20**#20 VCT @ 0.055 A / 10 V @ 0.11 A1.134.9 x 28.6 x 24.60.08- 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)2.434.9 x 28.6 x 30.80.11- 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)641.3 x 33.3 x 33.30.2026.9 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)1248.4 x 40.4 x 36.90.3231.8 x 7.6 x 10.2 x 35.8
ST-6-20 / DST-6-2020 VCT @ 1.0 A / 10 V @ 2.0 A2057.2 x 47.8 x 36.90.3638.1 x 7.6 x 10.2 x 40.6
ST-7-20 / DST-7-2020 VCT @ 1.8 A / 10 V @ 3.6 A3666.7 x 55.5 x 40.40.5010.2 x 10.2 x 47.0
ST-2-24**# / DST-2-24**#24 VCT @ 0.045 A / 12 V @ 0.09 A1.134.9 x 28.6 x 24.60.08- 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)2.434.9 x 28.6 x 30.80.11- 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)641.3 x 33.3 x 33.30.2026.9 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)1248.4 x 40.4 x 36.90.3231.8 x 7.6 x 10.2 x 35.8
ST-6-24 / DST-6-2424 VCT @ 0.8 A / 12 V @ 1.6 A2057.2 x 47.8 x 36.90.3638.1 x 7.6 x 10.2 x 40.6
ST-7-24 / DST-7-2424 VCT @ 1.5 A / 12 V @ 3.0 A3666.7 x 55.5 x 40.40.5010.2 x 10.2 x 47.0
ST-2-28 / DST-2-2828 VCT @ 0.04 A / 14 V @ 0.08 A1.134.9 x 28.6 x 24.60.08- x 6.4 x 6.4 x 30.5
ST-3-28 / DST-3-2828 VCT @ 0.085 A / 14 V @ 0.17 A2.434.9 x 28.6 x 30.80.11- x 6.4 x 6.4 x 30.5
ST-4-28 / DST-4-2828 VCT @ 0.2 A / 14 V @ 0.4 A641.3 x 33.3 x 33.30.2026.9 x 6.4 x 8.9 x 31.8
ST-5-28 / DST-5-2828 VCT @ 0.42 A / 14 V @ 0.84 A1248.4 x 40.4 x 36.90.3231.8 x 7.6 x 10.2 x 35.8
ST-6-28 / DST-6-2828 VCT @ 0.7 A / 14 V @ 1.4 A2057.2 x 47.8 x 36.90.3638.1 x 7.6 x 10.2 x 40.6
ST-7-28 / DST-7-2828 VCT @ 1.3 A / 14 V @ 2.6 A3666.7 x 55.5 x 40.40.5010.2 x 10.2 x 47.0
ST-2-36 / DST-2-3636 VCT @ 0.03 A / 18 V @ 0.06 A1.134.9 x 28.6 x 24.60.08- x 6.4 x 6.4 x 30.5
ST-3-36 / DST-3-3636 VCT @ 0.065 A / 18 V @ 0.13 A2.434.9 x 28.6 x 30.80.11- x 6.4 x 6.4 x 30.5
ST-4-36 / DST-4-3636 VCT @ 0.17 A / 18 V @ 0.34 A641.3 x 33.3 x 33.30.2026.9 x 6.4 x 8.9 x 31.8
ST-5-36 / DST-5-3636 VCT @ 0.35 A / 18 V @ 0.7 A1248.4 x 40.4 x 36.90.3231.8 x 7.6 x 10.2 x 35.8
ST-6-36 / DST-6-3636 VCT @ 0.55 A / 18 V @ 1.1 A2057.2 x 47.8 x 36.90.3638.1 x 7.6 x 10.2 x 40.6
ST-7-36 / DST-7-3636 VCT @ 1.0 A / 18 V @ 2.0 A3666.7 x 55.5 x 40.40.5010.2 x 10.2 x 47.0
ST-2-48 / DST-2-4848 VCT @ 0.023 A / 24 V @ 0.046 A1.134.9 x 28.6 x 24.60.08- x 6.4 x 6.4 x 30.5
ST-3-48 / DST-3-4848 VCT @ 0.05 A / 24 V @ 0.1 A2.434.9 x 28.6 x 30.80.11- x 6.4 x 6.4 x 30.5
ST-4-48 / DST-4-4848 VCT @ 0.125 A / 24 V @ 0.25 A641.3 x 33.3 x 33.30.2026.9 x 6.4 x 8.9 x 31.8
ST-5-48 / DST-5-4848 VCT @ 0.25 A / 24 V @ 0.5 A1248.4 x 40.4 x 36.90.3231.8 x 7.6 x 10.2 x 35.8
ST-6-48 / DST-6-4848 VCT @ 0.4 A / 24 V @ 0.8 A2057.2 x 47.8 x 36.90.3638.1 x 7.6 x 10.2 x 40.6
ST-7-48 / DST-7-4848 VCT @ 0.75 A / 24 V @ 1.5 A3666.7 x 55.5 x 40.40.5010.2 x 10.2 x 47.0
ST-2-56 / DST-2-5656 VCT @ 0.02 A / 28 V @ 0.04 A1.134.9 x 28.6 x 24.60.08- x 6.4 x 6.4 x 30.5
ST-3-56 / DST-3-5656 VCT @ 0.045 A / 28 V @ 0.09 A2.434.9 x 28.6 x 30.80.11- x 6.4 x 6.4 x 30.5
ST-4-56 / DST-4-5656 VCT @ 0.11 A / 28 V @ 0.22 A641.3 x 33.3 x 33.30.2026.9 x 6.4 x 8.9 x 31.8
ST-5-56 / DST-5-5656 VCT @ 0.22 A / 28 V @ 0.44 A1248.4 x 40.4 x 36.90.3231.8 x 7.6 x 10.2 x 35.8
ST-6-56 / DST-6-5656 VCT @ 0.35 A / 28 V @ 0.7 A2057.2 x 47.8 x 36.90.3638.1 x 7.6 x 10.2 x 40.6
ST-7-56 / DST-7-5656 VCT @ 0.65A / 28 V @ 1.3 A3666.7 x 55.5 x 40.40.5010.2 x 10.2 x 47.0
ST-2-120 / DST-2-120120 VCT @ 0.01 A / 60 V @ 0.02 A1.134.9 x 28.6 x 24.60.08- x 6.4 x 6.4 x 30.5
ST-3-120 / DST-3-120120 VCT @ 0.02 A / 60 V @ 0.04 A2.434.9 x 28.6 x 30.80.11- x 6.4 x 6.4 x 30.5
ST-4-120 / DST-4-120120 VCT @ 0.05 A / 60 V @ 0.1 A641.3 x 33.3 x 33.30.2026.9 x 6.4 x 8.9 x 31.8
ST-5-120 / DST-5-120120 VCT @ 0.1 A / 60 V @ 0.2 A1248.4 x 40.4 x 36.90.3231.8 x 7.6 x 10.2 x 35.8
ST-6-120 / DST-6-120120 VCT @ 0.16 A / 60 V @ 0.32 A2057.2 x 47.8 x 36.90.3638.1 x 7.6 x 10.2 x 40.6
ST-7-120 / DST-7-120120 VCT @ 0.3 A / 60 V @ 0.6 A3666.7 x 55.5 x 40.40.5010.2 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
Quality PCB mount transformer Bel Fuse ST-3-48 with split bobbin construction and Class 2 insulation system for sale

PCB mount transformer Bel Fuse ST-3-48 with split bobbin construction and Class 2 insulation system

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