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Tin-Plated Copper-Clad Steel (TCCS) wire

FISSOT® Tin-Plated Copper-Clad Steel (TCCS) Wire is an innovative, high-performance bimetallic conductor engineered specifically for electronic component leads, RF communication cables, and precision wiring harnesses. By utilizing advanced Cold Cladding Technology, we forge a permanent metallurgical bond protected by a high-purity electroplated tin layer. It is the premier choice for industrial applications requiring exceptional solderability, high mechanical strength, and cost-efficient conductivity.

🌟 Key Benefits

🧲 Ultimate Solderability: Features a precision pure tin outer plating that provides excellent wettability and reflow performance, ensuring "zero-defect" automated high-speed soldering even after long-term warehousing.
🛡️ Dual-Layer Corrosion Shield: The engineered micro-nano dense tin passivation surface layer works synergistically with the underlying oxygen-free copper, creating a robust physical and electrochemical barrier against moisture and salt spray.
⚡ Skin Effect Optimization: Optimizes high-frequency signal transmission by utilizing the highly conductive outer copper channel to keep pathways unobstructed, while the central steel core provides rigid physical support.
💪 Steel Structural Rigidity: Delivers exceptional tensile strength (550–850 MPa) to easily withstand heavy mechanical shear loads, automatic bending, and high tensions during winding or high-speed processing.

🚀 Top Applications

🔌 Electronic Component Leads: Ideal for lead wires and jumper wires in resistors, capacitors, diodes, and LEDs, fully compatible with automated wave and reflow soldering lines.
📡 RF & Telecommunication Cables: Serves as the central inner conductor for micro-coaxial cables, radio frequency lines, and LAN cables, ensuring high-speed data transmission and structural backbone.
🚗 Automotive & Industrial Harnesses: Perfect for internal wiring of automotive sensors and industrial electrical components exposed to high temperatures, vibration, and high-humidity environments.

Contact Us for Pricing

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Nominal Diameter (mm)	Allowable Tolerance (mm)	Thickness of Tin Plated Layer		Mechanical & Electrical Properties
		Ⅰ (μin)	Ⅱ (μin)	Tensile Strength (MPa)		Elongation (250mm) (%)
		Ⅰ (μin)	Ⅱ (μin)	R	Y/TY	R	TY
0.08	±0.003	0.3 < h ≤ 0.5	0.5 < h ≤ 1	≥ 320	≥ 900	≥ 10	≥ 0.5
0.10	±0.003	0.3 < h ≤ 0.5	0.5 < h ≤ 1	≥ 320	≥ 900	≥ 10	≥ 0.5
0.12	±0.003	0.3 < h ≤ 0.5	0.5 < h ≤ 1	≥ 320	≥ 900	≥ 10	≥ 0.5
0.16	±0.003	0.3 < h ≤ 0.5	0.5 < h ≤ 1	≥ 320	≥ 900	≥ 10	≥ 0.5
0.20	±0.003	0.3 < h ≤ 0.5	0.5 < h ≤ 1	≥ 320	≥ 900	≥ 10	≥ 0.5
0.254	±0.01	5 < h ≤ 10	10 < h ≤ 15	≥ 290	≥ 900	≥ 10	≥ 1.5
0.30	±0.01	5 < h ≤ 10	10 < h ≤ 15	≥ 290	≥ 900	≥ 10	≥ 1.5
0.40	±0.01	5 < h ≤ 10	10 < h ≤ 15	≥ 290	≥ 900	≥ 10	≥ 1.5
0.50	±0.01	5 < h ≤ 10	10 < h ≤ 15	290 – 310	1100 – 1250	≥ 10	≥ 1.5
0.51	±0.01	5 < h ≤ 10	10 < h ≤ 15	≥ 290	1100 – 1250	≥ 10	≥ 1.5
0.59	±0.01	5 < h ≤ 10	10 < h ≤ 15	≥ 290	≥ 900	≥ 10	≥ 1.5
0.60	±0.01	5 < h ≤ 10	10 < h ≤ 15	≥ 290	900 – 1100	≥ 10	≥ 1.5
0.61	±0.01	5 < h ≤ 10	10 < h ≤ 15	≥ 290	900 – 1100	≥ 10	≥ 1.5
0.63	±0.01	5 < h ≤ 10	10 < h ≤ 15	≥ 290	900 – 1100	≥ 10	≥ 1.5
0.65	±0.01	5 < h ≤ 10	10 < h ≤ 15	≥ 290	900 – 1100	≥ 10	≥ 1.5
0.70	±0.01	5 < h ≤ 10	10 < h ≤ 15	≥ 290	900 – 1100	≥ 10	≥ 1.5
0.71	±0.01	5 < h ≤ 10	10 < h ≤ 15	≥ 290	900 – 1100	≥ 10	≥ 1.5
0.80	±0.015	5 < h ≤ 10	10 < h ≤ 15	≥ 290	≥ 800	≥ 10	≥ 1.5
0.83	±0.015	5 < h ≤ 10	10 < h ≤ 15	≥ 290	850 – 1000	≥ 10	≥ 1.5
0.91	±0.015	5 < h ≤ 10	10 < h ≤ 15	≥ 290	850 – 1000	≥ 10	≥ 1.5
1.00	±0.02	5 < h ≤ 10	10 < h ≤ 15	≥ 290	850 – 1000	≥ 10	≥ 1.5
1.10	±0.02	5 < h ≤ 10	10 < h ≤ 15	≥ 290	850 – 1000	≥ 10	≥ 1.5
1.20	±0.02	5 < h ≤ 10	10 < h ≤ 15	≥ 290	850 – 1000	≥ 10	≥ 1.5

Sectional Area (mm²)	Structure (No. / mm)	Max DC Resistance (20°C) (Ω/km)	Tensile Strength (MPa)	Elongation (%)
0.60 / 0.50	19 / 0.20	42.20	100 – 150	1 – 25
0.75	19 / 0.23	34.18	—	—
1.00	19 / 0.26	26.75	—	—
1.50	19 / 0.32	17.65	—	—
2.00	19 / 0.36	13.95	—	—
2.50	19 / 0.41	10.32	—	—
3.00	19 / 0.47	8.32	—	—
4.00	19 / 0.53	6.48	—	—
5.00	19 / 0.59	5.23	—	—
8.00	19 / 0.73	3.42	—	—
10.00	19 / 0.82	2.70	—	—
15.00	19 / 1.01	1.75	—	—
20 – 400	All technical data and structures can be customized to meet customer requirements.

Technical FAQ — Tin-Plated Copper-Clad Steel (TCCS) Wire

Why is pure tin plating applied to FISSOT® TCCS wire, and how does it optimize solderability?

The precision electroplated pure tin outer layer provides an exceptional wetting balance and ultra-low surface tension during reflow or wave soldering. By completely shielding the underlying copper layer from atmospheric oxygen, it prevents surface oxidation and suppresses copper-tin intermetallic compound (IMC) overgrowth during warehousing, ensuring robust, "zero-defect" automated high-speed soldering performance.

Does the central steel core impact high-frequency signal transmission in TCCS conductors?

No, it exerts zero negative impact on high-frequency pathways due to the "Skin Effect." In RF, microwave, and high-speed data applications, electrical currents concentrate and travel exclusively along the outer perimeter of a conductor. FISSOT® TCCS wire directs these signals seamlessly through its highly conductive outer copper layer, while the central steel core functions strictly as a physical backbone, optimizing both signal integrity and material cost-efficiency.

How does FISSOT® TCCS wire resist corrosion in high-humidity or automotive environments?

Upon atmospheric exposure, the outer tin layer spontaneously forms a dense, self-healing micro-nano passivation surface film ($Sn/SnO_x$). This highly stable crystalline matrix, combined with the underlying high-purity oxygen-free copper, creates a dual-layer physical and electrochemical barrier that blocks the penetration of moisture, salt spray, and sulfur compounds, drastically slowing down pitting velocities to safeguard component lifespans.

What structural and mechanical advantages does TCCS wire hold over traditional pure copper leads?

Traditional pure copper wire is highly malleable and prone to elongation or sudden snapping under mechanical stress. Utilizing high-quality engineered steel core profiles, FISSOT® TCCS wire delivers an exceptional tensile strength threshold of 550–850 MPa. This superior structural rigidity easily withstands heavy mechanical shear loads, automatic bending, and high dynamic tensions during automated high-speed winding, braiding, or lead cutting.

What international compliance standards and quality logs govern FISSOT® TCCS wires?

All FISSOT® TCCS wires are engineered in strict alignment with ASTM B520 (Standard Specification for Tin-Coated Copper-Clad Steel Wire for Electronic Applications) and ASTM B452 criteria. Backed by world-class metallurgical quality controls, every global shipment undergoes rigorous concentricity verification and automated solderability testing, with complete material certifications and QC data logs attached.

What multi-dimensional customization options are available for specific client applications?

FISSOT® offers fully customizable conductor configurations to match diverse process requirements. Clients can specify copper volume ratios to achieve precise bulk conductivities (such as 21% IACS, 30% IACS, or 40% IACS), select variable steel core tempers to adjust elongation properties, and customize the electroplated tin layer thickness to satisfy demanding military or automotive soldering specifications.