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Properties of Contact Materials

Material Density gm/cc) Hardness (VPN) Conductivity (IACS%)
10.5 30-80 104
Ag Cu (97:3)
10.4 65-120 90
Silver Copper
Ag Cu (90:10)
10.3 75-130 86
Ag Cu (80:20)
10.2 85-150 84
Fine-grain Silver 10.5 55-100 100
Ag Ni (90:10)
10.3 50-90 94
Ag Ni (80:20)
10.1 60-95 80
Ag Ni (70:30)
10.0 65-105 70
Silver-Cadmium Oxide
Ag CdO (90:10) IO*
10.2 70-100 80
Silver Cadmium Oxide
Ag CdO (85:15) IO*
10.1 80-125 70
Silver-Cadmium Oxide
Ag CdO (90:10)
10.2 50-80 82
Silver-Cadmium Oxide
Ag CdO (88:12)
10.2 60-95 80
Silver-Cadmium Oxide
Ag CdO (85:15)
10.1 65-115 77
Silver Tin-Oxide
Ag SnO2 (90:10) IO*Internal Oxidation
10 75-110 88

(The above listed values are typical and shall not be taken for specification. There are a few in other grades having different composition).

Fields of Application:

Ag : Primarily used in low current devices such as Relays, timers, household switches, control switches, thermostats, motor protective switches etc.

Ag Ni: Extensively used in low voltage switching devices, power relays, light switches, rotary switches, circuit breakers, automatic switches, contactors, control switches, isolators, automobile applications etc.

Ag Cu: Switches for apparatus, commutator switches, magnetic switches, regulators, relays, controllers etc. AgCu is more suited to DC application.

Ag CdO: Widely used in low voltage switching devices; relays, micro switches, light switches, MCB's, ELCB's, low voltage contactors, protection switches, electric limiters, electronic switches, automobile switches, circuit breakers, etc.

Ag SnO2: Automatic switches, various kinds of relays & contactors, etc.

Material Properties

We at Electracon Paradise Limited have highly skilled personnel with decades of experience in manufacturing and designing the silver alloys to maximise functionality, performance and safety.

‘Contact material’ is of primary importance and its properties are the deciding factors in efficient and reliable operation of the contacts.The selection of ideal contact materials depends on the basic properties like high/ low electrical voltage, high conductivity thermal conductivity, good arc-interrupting capabilities with minimum contact resistance. Moreover, they must resist corrosion due to arc erosion and have minimum tendency against interfacial welding or sticking during service.

This process is extremely crucial and starts with the careful selection of raw materials and stringent inspection to meet our own demanding standards along with rigid quality control through each stage of the manufacturing cycle. Advanced techniques along with the highest-grade materials and precision measuring equipments are used and monitored against certified reference standards.