Power transformer Bel Fuse ST-7-48 featuring split bobbin construction and Class F insulation system

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Product Description

Product Overview

The Signal ST/DST Series Split/Tran Specialty Purpose & Class 2 Transformers are designed for split bobbin construction, offering superior isolation and low capacitive coupling. They feature rigid pin construction for easier board insertion and enhanced reliability. These transformers are suitable for a wide range of power applications, from 1.1 VA to 36 VA, and are built with a Class F insulation system (155 C).

Product Attributes

Brand: Signal Transformer
Series: ST / DST Series Split/Tran
Construction: Split Bobbin with dual cavity platform
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

Part Number	Secondary RMS Rating	VA Rating	Size (L x W x H)	Mounting Type	Weight (lbs/kg)
ST-2-10# / DST-2-10#	10 VCT @ 0.11 A / 5 V @ 0.22 A	1.1	1.37" (34.9mm) x 1.12" (28.6mm) x 0.97" (24.6mm)	6 Pin (ST) / 8 Pin (DST)	0.17 (0.08)
ST-3-10# / DST-3-10#	10 VCT @ 0.25 A (5) / 5 V @ 0.5 A (9)	2.4	1.37" (34.9mm) x 1.12" (28.6mm) x 1.21" (30.8mm)	6 Pin (ST) / 8 Pin (DST)	0.25 (0.11)
ST-4-10# / DST-4-10#	10 VCT @ 0.6 A (9) / 5 V @ 1.2 A (11)	6	1.62" (41.3mm) x 1.31" (33.3mm) x 1.31" (33.3mm)	6 Pin (ST) / 8 Pin (DST)	0.44 (0.20)
ST-5-10# / DST-5-10#	10 VCT @ 1.2 A (11) / 5 V @ 2.4 A (13)	12	1.91" (48.4mm) x 1.59" (40.4mm) x 1.45" (36.9mm)	6 Pin (ST) / 8 Pin (DST)	0.70 (0.32)
ST-6-10 / DST-6-10	10 VCT @ 2.0 A / 5 V @ 4.0 A	20	2.25" (57.2mm) x 1.88" (47.8mm) x 1.45" (36.9mm)	6 Pin (ST) / 8 Pin (DST)	0.80 (0.36)
ST-7-10 / DST-7-10	10 VCT @ 3.6 A / 5 V @ 7.2 A	36	2.62" (66.7mm) x 2.18" (55.5mm) x 1.59" (40.4mm)	6 Pin (ST) / 8 Pin (DST)	1.1 (0.50)
ST-2-12# / DST-2-12#	12.6 VCT @ 0.09 A / 6.3 V @ 0.18 A	1.1	1.37" (34.9mm) x 1.12" (28.6mm) x 0.97" (24.6mm)	6 Pin (ST) / 8 Pin (DST)	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	1.37" (34.9mm) x 1.12" (28.6mm) x 1.21" (30.8mm)	6 Pin (ST) / 8 Pin (DST)	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	1.62" (41.3mm) x 1.31" (33.3mm) x 1.31" (33.3mm)	6 Pin (ST) / 8 Pin (DST)	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	1.91" (48.4mm) x 1.59" (40.4mm) x 1.45" (36.9mm)	6 Pin (ST) / 8 Pin (DST)	0.70 (0.32)
ST-6-12 / DST-6-12	12.6 VCT @ 1.6 A / 6.3 V @ 3.2 A	20	2.25" (57.2mm) x 1.88" (47.8mm) x 1.45" (36.9mm)	6 Pin (ST) / 8 Pin (DST)	0.80 (0.36)
ST-7-12 / DST-7-12	12.6 VCT @ 2.85 A / 6.3 V @ 5.7 A	36	2.62" (66.7mm) x 2.18" (55.5mm) x 1.59" (40.4mm)	6 Pin (ST) / 8 Pin (DST)	1.1 (0.50)
ST-2-16# / DST-2-16#	16 VCT @ 0.07 A / 8 V @ 0.14 A	1.1	1.37" (34.9mm) x 1.12" (28.6mm) x 0.97" (24.6mm)	6 Pin (ST) / 8 Pin (DST)	0.17 (0.08)
ST-3-16# / DST-3-16#	16 VCT @ 0.15 A (3) / 8 V @ 0.3 A (6)	2.4	1.37" (34.9mm) x 1.12" (28.6mm) x 1.21" (30.8mm)	6 Pin (ST) / 8 Pin (DST)	0.25 (0.11)
ST-4-16# / DST-4-16#	16 VCT @ 0.4 A (7) / 8 V @ 0.8 A (10)	6	1.62" (41.3mm) x 1.31" (33.3mm) x 1.31" (33.3mm)	6 Pin (ST) / 8 Pin (DST)	0.44 (0.20)
ST-5-16# / DST-5-16#	16 VCT @ 0.8 A (10) / 8 V @ 1.6 A (12)	12	1.91" (48.4mm) x 1.59" (40.4mm) x 1.45" (36.9mm)	6 Pin (ST) / 8 Pin (DST)	0.70 (0.32)
ST-6-16 / DST-6-16	16 VCT @ 1.25 A / 8 V @ 2.5 A	20	2.25" (57.2mm) x 1.88" (47.8mm) x 1.45" (36.9mm)	6 Pin (ST) / 8 Pin (DST)	0.80 (0.36)
ST-7-16 / DST-7-16	16 VCT @ 2.25 A / 8 V @ 4.5 A	36	2.62" (66.7mm) x 2.18" (55.5mm) x 1.59" (40.4mm)	6 Pin (ST) / 8 Pin (DST)	1.1 (0.50)
ST-2-20# / DST-2-20#	20 VCT @ 0.055 A / 10 V @ 0.11 A	1.1	1.37" (34.9mm) x 1.12" (28.6mm) x 0.97" (24.6mm)	6 Pin (ST) / 8 Pin (DST)	0.17 (0.08)
ST-3-20# / DST-3-20#	20 VCT @ 0.12 A (2) / 10 V @ 0.24 A (5)	2.4	1.37" (34.9mm) x 1.12" (28.6mm) x 1.21" (30.8mm)	6 Pin (ST) / 8 Pin (DST)	0.25 (0.11)
ST-4-20# / DST-4-20#	20 VCT @ 0.3 A (6) / 10 V @ 0.6 A (9)	6	1.62" (41.3mm) x 1.31" (33.3mm) x 1.31" (33.3mm)	6 Pin (ST) / 8 Pin (DST)	0.44 (0.20)
ST-5-20# / DST-5-20#	20 VCT @ 0.6 A (9) / 10 V @ 1.2 A (11)	12	1.91" (48.4mm) x 1.59" (40.4mm) x 1.45" (36.9mm)	6 Pin (ST) / 8 Pin (DST)	0.70 (0.32)
ST-6-20 / DST-6-20	20 VCT @ 1.0 A / 10 V @ 2.0 A	20	2.25" (57.2mm) x 1.88" (47.8mm) x 1.45" (36.9mm)	6 Pin (ST) / 8 Pin (DST)	0.80 (0.36)
ST-7-20 / DST-7-20	20 VCT @ 1.8 A / 10 V @ 3.6 A	36	2.62" (66.7mm) x 2.18" (55.5mm) x 1.59" (40.4mm)	6 Pin (ST) / 8 Pin (DST)	1.1 (0.50)
ST-2-24# / DST-2-24#	24 VCT @ 0.045 A / 12 V @ 0.09 A	1.1	1.37" (34.9mm) x 1.12" (28.6mm) x 0.97" (24.6mm)	6 Pin (ST) / 8 Pin (DST)	0.17 (0.08)
ST-3-24# / DST-3-24#	24 VCT @ 0.1 A (1) / 12 V @ 0.2 A (4)	2.4	1.37" (34.9mm) x 1.12" (28.6mm) x 1.21" (30.8mm)	6 Pin (ST) / 8 Pin (DST)	0.25 (0.11)
ST-4-24# / DST-4-24#	24 VCT @ 0.25 A (5) / 12 V @ 0.5 A (9)	6	1.62" (41.3mm) x 1.31" (33.3mm) x 1.31" (33.3mm)	6 Pin (ST) / 8 Pin (DST)	0.44 (0.20)
ST-5-24# / DST-5-24#	24 VCT @ 0.5 A (9) / 12 V @ 1.0 A (11)	12	1.91" (48.4mm) x 1.59" (40.4mm) x 1.45" (36.9mm)	6 Pin (ST) / 8 Pin (DST)	0.70 (0.32)
ST-6-24 / DST-6-24	24 VCT @ 0.8 A / 12 V @ 1.6 A	20	2.25" (57.2mm) x 1.88" (47.8mm) x 1.45" (36.9mm)	6 Pin (ST) / 8 Pin (DST)	0.80 (0.36)
ST-7-24 / DST-7-24	24 VCT @ 1.5 A / 12 V @ 3.0 A	36	2.62" (66.7mm) x 2.18" (55.5mm) x 1.59" (40.4mm)	6 Pin (ST) / 8 Pin (DST)	1.1 (0.50)
ST-2-28 / DST-2-28	28 VCT @ 0.04 A / 14 V @ 0.08 A	1.1	1.37" (34.9mm) x 1.12" (28.6mm) x 0.97" (24.6mm)	6 Pin (ST) / 8 Pin (DST)	0.17 (0.08)
ST-3-28 / DST-3-28	28 VCT @ 0.085 A / 14 V @ 0.17 A	2.4	1.37" (34.9mm) x 1.12" (28.6mm) x 1.21" (30.8mm)	6 Pin (ST) / 8 Pin (DST)	0.25 (0.11)
ST-4-28 / DST-4-28	28 VCT @ 0.2 A / 14 V @ 0.4 A	6	1.62" (41.3mm) x 1.31" (33.3mm) x 1.31" (33.3mm)	6 Pin (ST) / 8 Pin (DST)	0.44 (0.20)
ST-5-28 / DST-5-28	28 VCT @ 0.42 A / 14 V @ 0.84 A	12	1.91" (48.4mm) x 1.59" (40.4mm) x 1.45" (36.9mm)	6 Pin (ST) / 8 Pin (DST)	0.70 (0.32)
ST-6-28 / DST-6-28	28 VCT @ 0.7 A / 14 V @ 1.4 A	20	2.25" (57.2mm) x 1.88" (47.8mm) x 1.45" (36.9mm)	6 Pin (ST) / 8 Pin (DST)	0.80 (0.36)
ST-7-28 / DST-7-28	28 VCT @ 1.3 A / 14 V @ 2.6 A	36	2.62" (66.7mm) x 2.18" (55.5mm) x 1.59" (40.4mm)	6 Pin (ST) / 8 Pin (DST)	1.1 (0.50)
ST-2-36 / DST-2-36	36 VCT @ 0.03 A / 18 V @ 0.06 A	1.1	1.37" (34.9mm) x 1.12" (28.6mm) x 0.97" (24.6mm)	6 Pin (ST) / 8 Pin (DST)	0.17 (0.08)
ST-3-36 / DST-3-36	36 VCT @ 0.065 A / 18 V @ 0.13 A	2.4	1.37" (34.9mm) x 1.12" (28.6mm) x 1.21" (30.8mm)	6 Pin (ST) / 8 Pin (DST)	0.25 (0.11)
ST-4-36 / DST-4-36	36 VCT @ 0.17 A / 18 V @ 0.34 A	6	1.62" (41.3mm) x 1.31" (33.3mm) x 1.31" (33.3mm)	6 Pin (ST) / 8 Pin (DST)	0.44 (0.20)
ST-5-36 / DST-5-36	36 VCT @ 0.35 A / 18 V @ 0.7 A	12	1.91" (48.4mm) x 1.59" (40.4mm) x 1.45" (36.9mm)	6 Pin (ST) / 8 Pin (DST)	0.70 (0.32)
ST-6-36 / DST-6-36	36 VCT @ 0.55 A / 18 V @ 1.1 A	20	2.25" (57.2mm) x 1.88" (47.8mm) x 1.45" (36.9mm)	6 Pin (ST) / 8 Pin (DST)	0.80 (0.36)
ST-7-36 / DST-7-36	36 VCT @ 1.0 A / 18 V @ 2.0 A	36	2.62" (66.7mm) x 2.18" (55.5mm) x 1.59" (40.4mm)	6 Pin (ST) / 8 Pin (DST)	1.1 (0.50)
ST-2-48 / DST-2-48	48 VCT @ 0.023 A / 24 V @ 0.046 A	1.1	1.37" (34.9mm) x 1.12" (28.6mm) x 0.97" (24.6mm)	6 Pin (ST) / 8 Pin (DST)	0.17 (0.08)
ST-3-48 / DST-3-48	48 VCT @ 0.05 A / 24 V @ 0.1 A	2.4	1.37" (34.9mm) x 1.12" (28.6mm) x 1.21" (30.8mm)	6 Pin (ST) / 8 Pin (DST)	0.25 (0.11)
ST-4-48 / DST-4-48	48 VCT @ 0.125 A / 24 V @ 0.25 A	6	1.62" (41.3mm) x 1.31" (33.3mm) x 1.31" (33.3mm)	6 Pin (ST) / 8 Pin (DST)	0.44 (0.20)
ST-5-48 / DST-5-48	48 VCT @ 0.25 A / 24 V @ 0.5 A	12	1.91" (48.4mm) x 1.59" (40.4mm) x 1.45" (36.9mm)	6 Pin (ST) / 8 Pin (DST)	0.70 (0.32)
ST-6-48 / DST-6-48	48 VCT @ 0.4 A / 24 V @ 0.8 A	20	2.25" (57.2mm) x 1.88" (47.8mm) x 1.45" (36.9mm)	6 Pin (ST) / 8 Pin (DST)	0.80 (0.36)
ST-7-48 / DST-7-48	48 VCT @ 0.75 A / 24 V @ 1.5 A	36	2.62" (66.7mm) x 2.18" (55.5mm) x 1.59" (40.4mm)	6 Pin (ST) / 8 Pin (DST)	1.1 (0.50)
ST-2-56 / DST-2-56	56 VCT @ 0.02 A / 28 V @ 0.04 A	1.1	1.37" (34.9mm) x 1.12" (28.6mm) x 0.97" (24.6mm)	6 Pin (ST) / 8 Pin (DST)	0.17 (0.08)
ST-3-56 / DST-3-56	56 VCT @ 0.045 A / 28 V @ 0.09 A	2.4	1.37" (34.9mm) x 1.12" (28.6mm) x 1.21" (30.8mm)	6 Pin (ST) / 8 Pin (DST)	0.25 (0.11)
ST-4-56 / DST-4-56	56 VCT @ 0.11 A / 28 V @ 0.22 A	6	1.62" (41.3mm) x 1.31" (33.3mm) x 1.31" (33.3mm)	6 Pin (ST) / 8 Pin (DST)	0.44 (0.20)
ST-5-56 / DST-5-56	56 VCT @ 0.22 A / 28 V @ 0.44 A	12	1.91" (48.4mm) x 1.59" (40.4mm) x 1.45" (36.9mm)	6 Pin (ST) / 8 Pin (DST)	0.70 (0.32)
ST-6-56 / DST-6-56	56 VCT @ 0.35 A / 28 V @ 0.7 A	20	2.25" (57.2mm) x 1.88" (47.8mm) x 1.45" (36.9mm)	6 Pin (ST) / 8 Pin (DST)	0.80 (0.36)
ST-7-56 / DST-7-56	56 VCT @ 0.65A / 28 V @ 1.3 A	36	2.62" (66.7mm) x 2.18" (55.5mm) x 1.59" (40.4mm)	6 Pin (ST) / 8 Pin (DST)	1.1 (0.50)
ST-2-120 / DST-2-120	120 VCT @ 0.01 A / 60 V @ 0.02 A	1.1	1.37" (34.9mm) x 1.12" (28.6mm) x 0.97" (24.6mm)	6 Pin (ST) / 8 Pin (DST)	0.17 (0.08)
ST-3-120 / DST-3-120	120 VCT @ 0.02 A / 60 V @ 0.04 A	2.4	1.37" (34.9mm) x 1.12" (28.6mm) x 1.21" (30.8mm)	6 Pin (ST) / 8 Pin (DST)	0.25 (0.11)
ST-4-120 / DST-4-120	120 VCT @ 0.05 A / 60 V @ 0.1 A	6	1.62" (41.3mm) x 1.31" (33.3mm) x 1.31" (33.3mm)	6 Pin (ST) / 8 Pin (DST)	0.44 (0.20)
ST-5-120 / DST-5-120	120 VCT @ 0.1 A / 60 V @ 0.2 A	12	1.91" (48.4mm) x 1.59" (40.4mm) x 1.45" (36.9mm)	6 Pin (ST) / 8 Pin (DST)	0.70 (0.32)
ST-6-120 / DST-6-120	120 VCT @ 0.16 A / 60 V @ 0.32 A	20	2.25" (57.2mm) x 1.88" (47.8mm) x 1.45" (36.9mm)	6 Pin (ST) / 8 Pin (DST)	0.80 (0.36)
ST-7-120 / DST-7-120	120 VCT @ 0.3 A / 60 V @ 0.6 A	36	2.62" (66.7mm) x 2.18" (55.5mm) x 1.59" (40.4mm)	6 Pin (ST) / 8 Pin (DST)	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 configuration
Electrostatic Shield: Not necessary due to split bobbin construction
Mounting Hardware: See chart. Optional mounting screw (ST-MS) and nut (ST-MN) available from Signal. Size 7 has 4 mounting holes on 2.18" x 1.75" centers for #6 screws.

Recommended Secondary Fuse Values: