0.25mm Precision Bonding Wire with Copper Clad Steel Alloy Structure

• Customization: Available
• Type: Bare
• Conductor Type: Single Core
• Model NO.: Single Wire
• Application: Overhead, Heating, Underground
• Conductor Material: Copper Clad Steel
• Sheath Material: None
• Insulation Material: None
• Material Shape: Round Wire
• Range of Application: Electronics / Grounding / Communication
• Certification: ISO9001, CE, CCC, RoHS, VDE
• Brand: Mosstee
• Temperature Resistance: up to 250°c
• Conductivity: Approx. 20% Iacs
• Tensile Strength: ≥ 500 MPa
• Wire Structure: 0.25mm Precision Strand, Copper Clad Steel Core
• Transport Package: Plastic Reel Packaging and Carton Vacuum Packaging
• Specification: Customized
• Trademark: MOSSTEE
• Origin: Jiangsu, China
• HS Code: 73121090
• Production Capacity: 500tons/Year
• Package Size: 80.00cm * 30.00cm * 30.00cm
• Package Gross Weight: 50.000kg

Product Description

Product Description

0.25mm Precision Bonding Wire with Copper Clad Steel Structure is a medium-fine conductor engineered for applications requiring both mechanical strength and consistent electrical performance. Its steel core offers enhanced tensile strength and dimensional stability, while the outer copper layer ensures good conductivity and corrosion resistance.

Designed for precision bonding in electrical assemblies, enclosures, and grounding interfaces, this wire delivers reliable performance in compact and high-frequency environments.

 

Key Features

• 0.25mm diameter ideal for bonding and grounding in tight assemblies

• Copper-clad surface provides conductivity and oxidation resistance

• Steel core ensures strength and reliable shape retention

• Suitable for use in EMI-shielded systems and internal circuits

• Easily processed by welding, soldering, or mechanical crimping

 

Applications

• Bonding wires in circuit boards and electrical modules

• Compact grounding paths in instrumentation devices

• Internal ground mesh or jumper wire in telecom systems

• Braided cable terminations for signal or control systems

• Small-scale industrial enclosures requiring secure electrical bonding

 

Quality & Standards

• Manufactured in accordance with ASTM B452 or custom tolerances

• Consistent cladding thickness and circularity across entire length

• Approx. 20% IACS conductivity based on copper-steel composite

• RoHS / ISO9001 / REACH certified production and inspection process

• Delivered in spools, cut lengths, or customized industrial packaging

Detailed Photos

 

Product Parameters

Stainless steel Wire Specifications
Parameter	Single Wire (Solid)	Stranded Wire
Conductor Type	Solid	Customization available
Diameter	0.01mm-0.50mm
Conductor Material	Stainless steel wire (304, 316, 321, 430, 410)
Tensile properties	500-2000MPa
Density	7.8g/cm³
Melting Point	1400-1500°C
Certifications	RoHS, REACH, UL (optional)
Packaging	Customized package available
Key Applications	Electrical connectors, circuit board components, and shielding mesh, EDM Wire, Medical & Surgical Instruments, Aircraft components, suspension systems, and vibration-resistant fasteners, Spring wires

 

TABLE 1. Approximate Short-Time Fusing Currents of Dead Soft Annealed (DSA) CCS Stranded Conductors
 

CONDUCTOR SIZE AWG	DURATION OF CURRENT IN CYCLES OR SECONDS
	3 CYCLES (0.05 SEC)	6 CYCLES (0.10 SEC)	9 CYCLES (0.15 SEC)	30 CYCLES (0.50 SEC)	60 CYCLES (1.0 SEC)	120 CYCLES (2.0 SEC)
	CURRENT IN KA
40% CONDUCTIVITY
19-Wire Stranded
19 No. 5	269.02	190.22	155.32	85.07	60.15	42.54
19 No. 6	213.33	150.85	123.17	67.46	47.70	33.73
19 No. 7	169.17	119.62	97.67	53.50	37.83	26.75
19 No. 8	134.17	94.87	77.46	42.43	30.00	21.21
19 No. 9	106.40	75.23	61.43	33.65	23.79	16.82
7-Wire Stranded
7 No. 4	124.97	88.37	72.15	39.52	27.94	19.76
7 No. 5	99.11	70.08	57.22	31.34	22.16	15.67
7 No. 6	78.60	55.58	45.38	24.85	17.57	12.43
7 No. 7	62.33	44.07	35.98	19.71	13.94	9.85
7 No. 8	49.43	34.95	28.54	15.63	11.05	7.82
7 No. 9	39.20	27.72	22.63	12.40	8.77	6.20
7 No. 10	31.08	21.98	17.95	9.83	6.95	4.91
2 AWG	22.14	15.66	12.79	7.00	4.95	3.50
4 AWG	13.84	9.79	7.99	4.38	3.10	2.19
Single Wire Stranded
2 AWG	28.39	20.07	16.39	8.98	6.35	4.49
4 AWG	17.85	12.62	10.31	5.65	3.99	2.82
6 AWG	11.23	7.94	6.48	3.55	2.51	1.78

 

CONDUCTOR SIZE AWG	DURATION OF CURRENT IN CYCLES OR SECONDS
	3 CYCLES (0.05 SEC)	6 CYCLES (0.10 SEC)	9 CYCLES (0.15 SEC)	30 CYCLES (0.50 SEC)	60 CYCLES (1.0 SEC)	120 CYCLES (2.0 SEC)
	CURRENT IN KA
30% CONDUCTIVITY
19-Wire Stranded
19 No. 5	232.99	164.75	134.52	73.68	52.10	36.84
19 No. 6	184.76	130.65	106.67	58,43	41.31	29.21
19 No. 7	146.52	103.60	84.59	46.33	32.76	23.17
19 No. 8	116.20	82.17	67.09	36.75	25.98	18.37
19 No. 9	92.15	65.16	53.20	29.14	20.60	14.57
7-Wire Stranded
7 No. 4	108.23	76.53	62.49	34.23	24.20	17.11
7 No. 5	85.84	60.70	49.56	27.14	19.19	13.57
7 No. 6	68.07	48.13	39.30	21.53	15.22	10.76
7 No. 7	53.98	38.17	31.17	17.07	12.07	8.54
7 No. 8	42.81	30.27	24.72	13.54	9.57	6.77
7 No. 9	33.95	24.01	19.60	10.74	7.59	5.37
7 No. 10	26.92	19.04	15.54	8.51	6.02	4.26
2 AWG	19.18	13.56	11.07	6.06	4.29	3.03
4 AWG	11.99	8.48	6.92	3.79	2.68	1.90
Single Wire Stranded
2 AWG	24.59	17.38	14.19	7.77	5.50	3.89
4 AWG	15.46	10.93	8.93	4.89	3.46	2.44
6 AWG	9.72	6.88	5.61	3.08	2.17	1.54

TABLE 2. Physical and Electrical Characteristics of Dead Soft Annealed (DSA) CCS Stranded Conductors
 

CONDUCTOR SIZE AWG	DIAMETER		MINI BREAKING LOADS				WEIGHT		CROSS SECTION AREA		APPROXIMATE SHORT- TIME FUSING CURRENT AT 30 CYCLES (KA)
			40% COND		30% COND		LBS/KFT	KG/KM
	INCH	MM	LBF	kN	LBF	kN			CMIL	MM2	40% COND	30% COND
19-Wire Stranded
19 No. 5	0.91	23.1	17246	76.7	19402	86.3	1769	2632	628665	318.55	85.07	73.68
19 No. 6	0.81	20.57	13679	60.8	15389	68.5	1403	2088	498636	252.66	67.46	58.43
19 No. 7	0.722	18.33	10853	48.3	12210	54.3	1113	1656	395627	200.47	53.50	46.33
19 No. 8	0.643	16.32	8606	38.3	9682	43.1	883	1314	313733	158.97	42.43	36.75
19 No. 9	0.572	14.53	6821	30.3	7674	34.1	700	1041	248660	126.00	33.65	29.14
7-Wire Stranded
7 No. 4	0.613	15.57	8015	35.7	9017	40.1	819	1218	292169	148.04	39.52	34.23
7 No. 5	0.546	13.86	6354	28.3	7148	31.8	649	966	231613	117.36	31.34	27.14
7 No. 6	0.486	12.34	5040	22.4	5670	25.2	515	766	183708	93.09	24.85	21.53
7 No. 7	0.433	11.00	3998	17.8	4498	20.0	408	608	145757	73.86	19.71	17.07
7 No. 8	0.386	9.79	3171	14.1	3567	15.9	324	482	115586	58.57	15.63	13.54
7 No. 9	0.343	8.72	2513	11.2	2827	12.6	257	382	91612	46.42	12.40	10.74
7 No. 10	0.306	7.76	1994	8.9	2243	10.0	204	303	72685	36.83	9.83	8.51
2 AWG	0.258	6.55	1435	6.4	1614	7.2	145	216	51772	26.23	7.00	6.06
4 AWG	0.204	5.18	897	4.0	1009	4.5	91	135	32368	16.40	4.38	3.79
Single Wire Stranded
2 AWG	0.258	6.54	2023	9.0	2275	10.1	184	274	66358	33.62	8.98	7.77
4 AWG	0.204	5.19	1272	5.7	1431	6.4	116	172	41738	21.15	5.65	4.89
6 AWG	0.162	4.11	800	3.6	900	4.0	73	108	26244	13.30	3.55	3.08

Certifications

Packaging & Shipping

Company Profile

Mosstee specializes in high-performance conductor materials, including silver-plated copper wire, nickel-plated copper wire, copper-clad aluminum, copper-clad steel, and aluminum alloy cables, widely used in power, telecommunications, automotive, and new energy industries.
 

Our Advantages

1. Three Decades of Specialized Expertise
As a pure-play wire & cable manufacturer since 1990, we deliver precisely engineered solutions for industrial, energy, and infrastructure applications.

2. Certified Quality Assurance
All products meet UL, CE, and RoHS standards, with ISO 9001-certified manufacturing ensuring 99.97% defect-free delivery across 50+ countries.

3. Eco-Conscious Production
REACH-compliant materials reduce carbon footprint by 30% vs industry average, with 85% recyclable product designs.
 

After Sales Service

Service Excellence

1. 24/7 Technical Support
Dedicated engineers on-call for urgent troubleshooting, with <3hr response time for critical infrastructure projects.

2. Customization from Blueprint to Delivery
• Prototype development in 10-14 days
• Minimum Order Quantity (MOQ) as low as 50 kgs
• OEM/ODM compliant with NEC, IEC & EN standards

3. Transparent Project Management
Assigned account managers provide weekly progress reports with:

• Test report
• Production line videos
• Customs clearance updates

4. Risk-Free Trial
Test samples in your application for 90 days - we cover return shipping if unsatisfied.