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China Specialty Purpose Split Bobbin Transformer with Dual Primary and Secondary Options Bel Fuse ST-7-16 for sale

Specialty Purpose Split Bobbin Transformer with Dual Primary and Secondary Options Bel Fuse ST-7-16

Price Negotiable
Price: Negotiable
MOQ: Negotiable
Delivery Time: Negotiable
Product Description

Bel Fuse Signal ST/DST Series Split Bobbin Transformers

Product Overview

The Bel Fuse Signal ST and DST Series Split/Tran Specialty Purpose & Class 2 Transformers are designed with a dual cavity platform, offering superior isolation and low capacitive coupling. These split bobbin transformers feature rigid pin construction for enhanced board insertion reliability. They are suitable for a wide range of power applications from 1.1 VA to 36 VA, with single or dual primaries and series or parallel secondaries. The inherent split bobbin construction eliminates the need for an electrostatic shield, and they are built with a Class F, 155C insulation system.

Product Attributes

  • Brand: Bel Fuse Signal
  • Series: ST / DST Series Split/Tran
  • Type: Specialty Purpose & Class 2 Transformers, Split Bobbin
  • Insulation System: Class F, 155C
  • 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 (#)
    • CSA certified as Inherently Limited (*)
    • CSA certified as Non Inherently Limited (#) - see recommended fuse rating table.
    • UL Recognized UL5085-3, Inherently Limited File # E116583
  • Compliance: RoHS Compliant
  • Customization: Custom versions available upon request.

Technical Specifications

Part Number Secondary RMS Rating (Series) Secondary RMS Rating (Parallel) VA Rating Primary Voltage Frequency Dielectric Strength Insulation System Dimensions (L x W x H) Weight (lbs/kg)
ST-2-10**# / DST-2-10**# 10 VCT @ 0.11 A 5 V @ 0.22 A 1.1 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) in (mm) 0.17 (0.08)
ST-3-10*# / DST-3-10*# 10 VCT @ 0.25 A (5) 5 V @ 0.5 A (9) 2.4 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) in (mm) 0.25 (0.11)
ST-4-10*# / DST-4-10*# 10 VCT @ 0.6 A (9) 5 V @ 1.2 A (11) 6 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) in (mm) 0.44 (0.20)
ST-5-10*# / DST-5-10*# 10 VCT @ 1.2 A (11) 5 V @ 2.4 A (13) 12 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) in (mm) 0.70 (0.32)
ST-6-10 / DST-6-10 10 VCT @ 2.0 A 5 V @ 4.0 A 20 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) in (mm) 0.80 (0.36)
ST-7-10 / DST-7-10 10 VCT @ 3.6 A 5 V @ 7.2 A 36 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) in (mm) 1.1 (0.50)
ST-2-12**# / DST-2-12**# 12.6 VCT @ 0.09 A 6.3 V @ 0.18 A 1.1 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) in (mm) 0.17 (0.08)
ST-3-12*# / DST-3-12*# 12.6 VCT @ 0.2 A (4) 6.3 V @ 0.4 A (8) 2.4 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) in (mm) 0.25 (0.11)
ST-4-12*# / DST-4-12*# 12.6 VCT @ 0.5 A (9) 6.3 V @ 1.0 A (11) 6 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) in (mm) 0.44 (0.20)
ST-5-12*# / DST-5-12*# 12.6 VCT @ 1.0 A (11) 6.3 V @ 2.0 A (13) 12 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) in (mm) 0.70 (0.32)
ST-6-12 / DST-6-12 12.6 VCT @ 1.6 A 6.3 V @ 3.2 A 20 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) in (mm) 0.80 (0.36)
ST-7-12 / DST-7-12 12.6 VCT @ 2.85 A 6.3 V @ 5.7 A 36 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) in (mm) 1.1 (0.50)
ST-2-16**# / DST-2-16**# 16 VCT @ 0.07 A 8 V @ 0.14 A 1.1 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) in (mm) 0.17 (0.08)
ST-3-16*# / DST-3-16*# 16 VCT @ 0.15 A (3) 8 V @ 0.3 A (6) 2.4 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) in (mm) 0.25 (0.11)
ST-4-16*# / DST-4-16*# 16 VCT @ 0.4 A (7) 8 V @ 0.8 A (10) 6 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) in (mm) 0.44 (0.20)
ST-5-16*# / DST-5-16*# 16 VCT @ 0.8 A (10) 8 V @ 1.6 A (12) 12 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) in (mm) 0.70 (0.32)
ST-6-16 / DST-6-16 16 VCT @ 1.25 A 8 V @ 2.5 A 20 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) in (mm) 0.80 (0.36)
ST-7-16 / DST-7-16 16 VCT @ 2.25 A 8 V @ 4.5 A 36 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) in (mm) 1.1 (0.50)
ST-2-20**# / DST-2-20**# 20 VCT @ 0.055 A 10 V @ 0.11 A 1.1 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) in (mm) 0.17 (0.08)
ST-3-20*# / DST-3-20*# 20 VCT @ 0.12 A (2) 10 V @ 0.24 A (5) 2.4 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) in (mm) 0.25 (0.11)
ST-4-20*# / DST-4-20*# 20 VCT @ 0.3 A (6) 10 V @ 0.6 A (9) 6 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) in (mm) 0.44 (0.20)
ST-5-20*# / DST-5-20*# 20 VCT @ 0.6 A (9) 10 V @ 1.2 A (11) 12 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) in (mm) 0.70 (0.32)
ST-6-20 / DST-6-20 20 VCT @ 1.0 A 10 V @ 2.0 A 20 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) in (mm) 0.80 (0.36)
ST-7-20 / DST-7-20 20 VCT @ 1.8 A 10 V @ 3.6 A 36 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) in (mm) 1.1 (0.50)
ST-2-24**# / DST-2-24**# 24 VCT @ 0.045 A 12 V @ 0.09 A 1.1 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) in (mm) 0.17 (0.08)
ST-3-24*# / DST-3-24*# 24 VCT @ 0.1 A (1) 12 V @ 0.2 A (4) 2.4 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) in (mm) 0.25 (0.11)
ST-4-24*# / DST-4-24*# 24 VCT @ 0.25 A (5) 12 V @ 0.5 A (9) 6 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) in (mm) 0.44 (0.20)
ST-5-24*# / DST-5-24*# 24 VCT @ 0.5 A (9) 12 V @ 1.0 A (11) 12 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) in (mm) 0.70 (0.32)
ST-6-24 / DST-6-24 24 VCT @ 0.8 A 12 V @ 1.6 A 20 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) in (mm) 0.80 (0.36)
ST-7-24 / DST-7-24 24 VCT @ 1.5 A 12 V @ 3.0 A 36 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) in (mm) 1.1 (0.50)
ST-2-28 / DST-2-28 28 VCT @ 0.04 A 14 V @ 0.08 A 1.1 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) in (mm) 0.17 (0.08)
ST-3-28 / DST-3-28 28 VCT @ 0.085 A 14 V @ 0.17 A 2.4 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) in (mm) 0.25 (0.11)
ST-4-28 / DST-4-28 28 VCT @ 0.2 A 14 V @ 0.4 A 6 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) in (mm) 0.44 (0.20)
ST-5-28 / DST-5-28 28 VCT @ 0.42 A 14 V @ 0.84 A 12 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) in (mm) 0.70 (0.32)
ST-6-28 / DST-6-28 28 VCT @ 0.7 A 14 V @ 1.4 A 20 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) in (mm) 0.80 (0.36)
ST-7-28 / DST-7-28 28 VCT @ 1.3 A 14 V @ 2.6 A 36 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) in (mm) 1.1 (0.50)
ST-2-36 / DST-2-36 36 VCT @ 0.03 A 18 V @ 0.06 A 1.1 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) in (mm) 0.17 (0.08)
ST-3-36 / DST-3-36 36 VCT @ 0.065 A 18 V @ 0.13 A 2.4 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) in (mm) 0.25 (0.11)
ST-4-36 / DST-4-36 36 VCT @ 0.17 A 18 V @ 0.34 A 6 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) in (mm) 0.44 (0.20)
ST-5-36 / DST-5-36 36 VCT @ 0.35 A 18 V @ 0.7 A 12 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) in (mm) 0.70 (0.32)
ST-6-36 / DST-6-36 36 VCT @ 0.55 A 18 V @ 1.1 A 20 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) in (mm) 0.80 (0.36)
ST-7-36 / DST-7-36 36 VCT @ 1.0 A 18 V @ 2.0 A 36 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) in (mm) 1.1 (0.50)
ST-2-48 / DST-2-48 48 VCT @ 0.023 A 24 V @ 0.046 A 1.1 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) in (mm) 0.17 (0.08)
ST-3-48 / DST-3-48 48 VCT @ 0.05 A 24 V @ 0.1 A 2.4 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) in (mm) 0.25 (0.11)
ST-4-48 / DST-4-48 48 VCT @ 0.125 A 24 V @ 0.25 A 6 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) in (mm) 0.44 (0.20)
ST-5-48 / DST-5-48 48 VCT @ 0.25 A 24 V @ 0.5 A 12 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) in (mm) 0.70 (0.32)
ST-6-48 / DST-6-48 48 VCT @ 0.4 A 24 V @ 0.8 A 20 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) in (mm) 0.80 (0.36)
ST-7-48 / DST-7-48 48 VCT @ 0.75 A 24 V @ 1.5 A 36 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) in (mm) 1.1 (0.50)
ST-2-56 / DST-2-56 56 VCT @ 0.02 A 28 V @ 0.04 A 1.1 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) in (mm) 0.17 (0.08)
ST-3-56 / DST-3-56 56 VCT @ 0.045 A 28 V @ 0.09 A 2.4 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) in (mm) 0.25 (0.11)
ST-4-56 / DST-4-56 56 VCT @ 0.11 A 28 V @ 0.22 A 6 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) in (mm) 0.44 (0.20)
ST-5-56 / DST-5-56 56 VCT @ 0.22 A 28 V @ 0.44 A 12 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) in (mm) 0.70 (0.32)
ST-6-56 / DST-6-56 56 VCT @ 0.35 A 28 V @ 0.7 A 20 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) in (mm) 0.80 (0.36)
ST-7-56 / DST-7-56 56 VCT @ 0.65A 28 V @ 1.3 A 36 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) in (mm) 1.1 (0.50)
ST-2-120 / DST-2-120 120 VCT @ 0.01 A 60 V @ 0.02 A 1.1 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.37 (34.9) x 1.12 (28.6) x 0.97 (24.6) in (mm) 0.17 (0.08)
ST-3-120 / DST-3-120 120 VCT @ 0.02 A 60 V @ 0.04 A 2.4 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.37 (34.9) x 1.12 (28.6) x 1.21 (30.8) in (mm) 0.25 (0.11)
ST-4-120 / DST-4-120 120 VCT @ 0.05 A 60 V @ 0.1 A 6 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.62 (41.3) x 1.31 (33.3) x 1.31 (33.3) in (mm) 0.44 (0.20)
ST-5-120 / DST-5-120 120 VCT @ 0.1 A 60 V @ 0.2 A 12 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 1.91 (48.4) x 1.59 (40.4) x 1.45 (36.9) in (mm) 0.70 (0.32)
ST-6-120 / DST-6-120 120 VCT @ 0.16 A 60 V @ 0.32 A 20 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 2.25 (57.2) x 1.88 (47.8) x 1.45 (36.9) in (mm) 0.80 (0.36)
ST-7-120 / DST-7-120 120 VCT @ 0.3 A 60 V @ 0.6 A 36 115 V 50/60 Hz 2500 Vrms Hipot Class F, 155C 2.62 (66.7) x 2.18 (55.5) x 1.59 (40.4) in (mm) 1.1 (0.50)

Note on Pin Configuration:
6 Pin Type ST: 115 V, 50/60 Hz. Polarity indicated by numbers 1, 5, 6, 8, 7, 4.
8 Pin Type DST: 115/230 V, 50/60 Hz. Polarity indicated by numbers 1, 5, 6, 8, 7, 3, 4, 2.

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.

Mounting Hardware: See Accessories datasheet for mounting screw information. Optional Mounting Screw & Nut available from Signal: ST-MS (screw) and ST-MN (nut). Size 7 has 4 mounting holes on 2.18 x 1.75 centers for #6 screws.


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Company Changsha Purple Horn E-Commerce Co., Ltd.
Location 2332 Kaibin Commercial Plaza, No. 419 Shaoshan Middle Road, Shazitang Street, Yuhua District, Changsha City, Hunan Province
Contact Person Sellina

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