Tungsten Copper Alloy Electrical Contacts Customized Arcing Contacts / Arc Runner
Tungsten copper alloy can be used in oil-filled devices, air and gas circuit breakers, contactors, and high voltage switch gear. Some common applications are: arcing contacts and plates, arc runners , current carrying members, blade facings etc.
The CuW75 tungsten copper alloy, with 75% of tungsten, is widely used in chip carriers, substrates, flanges and frames for power semiconductor devices. The high thermal conductivity of copper together with the low thermal expansion of tungsten allows thermal expansion matching to silicon, gallium arsenide, and some ceramics.
Applicatioins of WCu Alloy HV Contacts:
The high Electrical & thermal conductivity of copper are combined with the arc-resistant & non-welding properties of tungsten or their carbides to form an extensive series of compositions each designed to give the best performance for your particular application. These materials are used for such heavy duty contact applications as:
Circuit breakers, air & oil immersed
Arcing tips or arc runners
Make & break contacts
Heavy duty conductors, relays & switches.
Advantages of Copper Tungsten Contacts:
The high electrical and thermal conductivity of tungsten copper alloy allows a cool, effective transfer of power, while the excellent arc-resistance properties of tungsten copper minimize arc erosion and transfer problems. These characteristics can be varied by composition more silver or copper yields higher electrical and thermal conductivity, while a higher refractory metal content results in superior arc erosion properties. We offer a variety of composites to meet your demands. Regardless of the environment (oil-filled devices, air and gas circuit breakers, contactors, high voltage switch gear) or the application (arcing contacts and plates, arc runners, current carrying members and blade facings), you won't be disappointed in electrical contacts made from our copper tungsten composites.
Specifications of WCu Alloys:
| GRADE | CHEMICAL CONTENT | DENSITY | HARDNESS | | | |
| Cu | IMPURITY ≤ | W | g/cm3 ≥ | HB Kgf/mm2 ≥ | μΩ.cm ≤ | % ≥ | MPa ≥ |
| W50/Cu50 | 50±2.0 | 0.5 | BAL | 11.85 | 115 | 3.2 | 54 | -- |
| W55/Cu45 | 45±2.0 | 0.5 | BAL | 12.3 | 125 | 3.5 | 49 | -- |
| W60/Cu40 | 40±2.0 | 0.5 | BAL | 12.75 | 140 | 3.7 | 47 | -- |
| W65/Cu35 | 35±2.0 | 0.5 | BAL | 13.3 | 155 | 3.9 | 44 | -- |
| W70/Cu30 | 30±2.0 | 0.5 | BAL | 13.8 | 175 | 4.1 | 42 | 790 |
| W75/Cu25 | 25±2.0 | 0.5 | BAL | 14.5 | 195 | 4.5 | 38 | 885 |
| W80/Cu20 | 20±2.0 | 0.5 | BAL | 15.15 | 220 | 5 | 34 | 980 |
| W85/Cu15 | 15±2.0 | 0.5 | BAL | 15.9 | 240 | 5.7 | 30 | 1080 |
| W90/Cu10 | 10±2.0 | 0.5 | BAL | 16.75 | 260 | 6.5 | 27 | 1160 |
| Material | W90Cu10 | W88Cu12 | W85Cu15 | W80Cu20 | W75Cu25 |
| Tungsten Content (wt%) | 90 ± 1 | 88 ± 1 | 85 ± 1 | 80 ± 1 | 75 ± 1 |
| Density at 20°C (g/cm3) | 17.0 | 16.8 | 16.3 | 15.6 | 14.9 |
| Coefficient of thermal expansion at 20°C (10-6/K) | 6.5 | 6.7 | 7.0 | 8.3 | 9.0 |
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FOTMA CuW75 Tungsten Copper Alloy/Tungsten Copper Alloy Electrical Contacts Customized Arcing Contacts / Arc Runner Images
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