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China Split Bobbin Dual Cavity Transformers for Specialty Applications Bel Fuse DST-2-48 Class 2 Certified for sale

Split Bobbin Dual Cavity Transformers for Specialty Applications Bel Fuse DST-2-48 Class 2 Certified

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

Bel Fuse Signal ST / DST Series Split/Tran Specialty Purpose & Class 2 Transformers

The Signal ST and DST transformers are designed for specialty purposes and Class 2 applications, utilizing a split bobbin construction with dual cavities for superior isolation and low capacitive coupling. This design enhances reliability and simplifies board insertion with its rigid pin construction. These transformers are suitable for a wide range of power requirements from 1.1 VA to 36 VA.

Product Attributes

  • Brand: Bel Fuse Signal
  • Series: ST / DST Series Split/Tran
  • Construction: Split Bobbin with Dual Cavity
  • 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 - see recommended fuse rating table.
    • (#) UL Recognized UL5085-3, Inherently Limited File # E116583

Technical Specifications

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

Mounting Hardware

Refer to the chart for mounting hardware specifications. Optional Mounting Screw (ST-MS) and Nut (ST-MN) are available from Signal.

Size 7 Mounting: Features 4 mounting holes on 2.18 x 1.75 centers for #6 screws.

Recommended Secondary Fuse Values

See chart for recommended secondary fuse values, indicated by numbers in parentheses in the part number selection table.

Fuse Value Chart: (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.

Specifications subject to change without notice.

2020 Signal Transformer


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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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