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Triple-insulated wire – stranded type
ULVDESGS · RoHSB grade 130°CDirect solderableUL 2353
Triple-insulated wire (TLW-B7S) composed of 7 enameled wires (conductors) twisted together in concentric circular stranding; belongs to triple-insulated wire series, can be soldered directly, approved by UL E236542/VDE 40008834, suitable for high-frequency power supplies reducing skin effect.
Specification Sheet
Litz Triple Insulated Wire (TLW-B7S)
Litz Triple Insulated Wire (TLW-B7S)
| Dimensions | Max Conductor Resistance | Package Length | ||
|---|---|---|---|---|
| Conductor Diameter | Insulation | |||
| Target Overall Diameter | Max Target Overall Diameter | |||
| (mm) | (mm) | (mm) | (Ω/km) | (m) |
| 7/0.10 | 0.522 | 0.562 | 346.9 | 5000 |
| 7/0.11 | 0.552 | 0.592 | 285.2 | 4000 |
| 7/0.12 | 0.588 | 0.628 | 238.4 | 4000 |
| 7/0.13 | 0.618 | 0.658 | 202.4 | 3000 |
| 7/0.14 | 0.648 | 0.688 | 173.8 | 3000 |
| 7/0.15 | 0.678 | 0.718 | 151.1 | 3000 |
| 7/0.16 | 0.714 | 0.754 | 132.4 | 2000 |
| 7/0.17 | 0.744 | 0.784 | 117.0 | 2000 |
| 7/0.18 | 0.774 | 0.814 | 104.2 | 2000 |
| 7/0.19 | 0.804 | 0.844 | 93.34 | 2000 |
| 7/0.20 | 0.834 | 0.874 | 84.10 | 2000 |
| 7/0.21 | 0.864 | 0.904 | 76.18 | 1500 |
| 7/0.22 | 0.894 | 0.934 | 69.96 | 1500 |
| 7/0.23 | 0.930 | 0.970 | 63.91 | 1500 |
| 7/0.24 | 0.960 | 1.000 | 58.61 | 1500 |
| 7/0.25 | 0.990 | 1.030 | 53.94 | 1500 |
| 7/0.26 | 1.020 | 1.060 | 49.81 | 1000 |
| 7/0.27 | 1.050 | 1.090 | 46.13 | 1000 |
| 7/0.28 | 1.080 | 1.120 | 42.85 | 1000 |
| 7/0.29 | 1.110 | 1.150 | 39.91 | 1000 |
| 7/0.30 | 1.146 | 1.186 | 37.01 | 1000 |
Product CharacteristicsTemperature ratingClass B (130°C) Dielectric Breakdown Voltage> 12,000 V Direct SolderabilityDirect tinning solderable, no stripping required Pinholes0 Safety Registration NumberUL E236542 Reference SpecificationsCNS8938 · C3151 · UL2353 · UL1950
TLW-B Specification Characteristics (per approval document UL E236542)
High-voltage resistant, direct-solderable, triple-layer independent insulation. The following are characteristics per the approval document; complete wire gauge specifications are shown in the specification table below.
Structure Description
Conductor + Triple Independent Insulation = Reinforced Insulation
Triple-insulated wire extrudes three independent insulation layers sequentially over the copper conductor, each capable of independently passing insulation testing. When stacked in three layers, it qualifies as a winding wire component at the "Reinforced Insulation" level as defined in annexes such as IEC 62368-1 Annex J and IEC 61558-1 Annex K (actual status per corresponding certification documents), thereby allowing elimination of isolation tape and reduction of creepage distance during winding, resulting in smaller transformers and more streamlined winding processes.
Copper Conductor
Copper wire providing the primary conductive path.
First Insulation Layer (PET)
Polyester PET, basic insulation directly covering the conductor.
Second Insulation Layer (PET)
Second independent PET insulation, enhancing voltage withstand capability.
Third Insulation Layer (PA)
Outermost polyamide PA; three independent layers stacked achieve reinforced insulation level.
Application areas
Application Areas
Charger / switching-mode power supply transformerGeneral power supplyMedical device power supplyOn-board/EV charger (OBC) isolation transformerSolar micro-inverters / isolated convertersHome appliance / LED driver power supply
Certification StandardsCompliance and Certifications
ULValid
UL safety certificationOTHERValid
Other CertificationsSGSValid
IEC 62321 RoHSVDEValid
VDE German certificationISOValid
Quality management system
UL safety certificationOTHERValid
Other CertificationsSGSValid
IEC 62321 RoHSVDEValid
VDE German certificationISOValid
Quality management system
Applicable Standard: UL 2353; achieves IEC 62368-1 Annex J / IEC 61558-1 Annex K reinforced insulation level
Go to Technical Certificate Page →Related Products
Other Insulation Wire Series
Triple-insulated wire TLW-B
DAH JIN flagship triple-insulated wire (models TLW-B/TLW-BB). Triple independent insulation achieves reinforced insulation grade, eliminating creepage distance restrictions between windings; high-voltage resistant, can be soldered directly (no need to strip outer layer first). Approved by UL E236542, VDE 40008834, temperature rating Class B 130°C, conductor wire diameter 0.10–1.50 mm.
Multiple Wire Gauge SpecificationsUL / VDE
View Spec Sheet →Dual-layer insulated wire
Dual-layer independent insulation winding wire (TLW-B2), belonging to the same approval series as flagship TLW-B; approved by UL E236542/VDE 40008834, specifications 0.10–1.00 mm, can be soldered directly.
Multiple Wire Gauge SpecificationsUL / VDE
View Spec Sheet →Single-layer insulated wire
Single-layer insulated economical winding wire (TLW-B1), suitable for general electronic transformer applications. Approved by UL E236542, conductor wire diameter 0.10–0.20 mm.
Multiple Wire Gauge SpecificationsUL / VDE
View Spec Sheet →Class F triple-insulated wire
Class F triple-insulated wire (TLW-F): temperature rating Class F 155°C, specifications 0.10–1.00 mm, triple independent insulation achieves reinforced insulation grade, can be soldered directly, eliminating creepage distance restrictions between windings. Same approval series as TLW-B.
Multiple Wire Gauge SpecificationsUL / VDE
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