| Material |
Density
(OzT/in^2) |
Electrical Conductivity
(%IACS) |
Approx
Annealed
15T |
Hardness
Hard
15T |
Desireable Properties |
Typical Applications |
| Fine Silver
99.9Ag |
5.54
|
105 |
30 |
75 |
Highest electrical
& thermal conductivity, low contact resistance, operates at
low contact force |
Appliance and heating
thermostats, light duty switches and controls (AC & DC) |
Silver Cadmium-Oxide
90Ag,10CdO
86.5Ag,13.5CdO
85Ag,15CdO |
5.44
5.37
5.30
|
82
76
72
|
53
54
55
|
75
76
77
|
High conductivity,
arc quenching properties, resists sticking, low arc erosion, high
current carrying capability |
Medium to heavy duty
switches & controls, wall switches, motor starters, DC switches
& relays, AC & DC circuit breakers, motor protectors |
| Silver Tin-Oxide
92Ag,8SnO2
90Ag,10SnO2
88Ag,12SnO2 |
5.31
5.24
5.16
|
86
82
77
|
56
60
66
|
73
77
82
|
High conductivity,
resists sticking, very low arc erosion, high current carrying
capability |
Automotive switches
& relays, medium to heavy duty switching devices |
Silver Nickel
90Ag,10Ni
85Ag,15Ni |
5.44
5.39
|
89
82
|
51
53
|
72
73
|
High conductivity,
resists sticking, operates at fairly low contact force |
Medium duty AC switches & relays, general purpose switching
devices
|
Coin Silver
90Ag,10Cu |
5.43 |
85 |
70 |
84 |
Increased hardness,
lower cost |
Automotive switches
& relays, sliding contacts, light duty switches & controls |
| 75Ag,24.5Cu,0.5Ni |
5.27 |
75 |
78 |
88 |
Low cost, increased
hardness even at high operating temperatures, low material transfer |
Automotive & other
low voltage DC devices |
85Ag, 15Cd
|
5.36 |
35 |
45 |
84 |
Increased hardness,
low material transfer, resists sticking |
Automotive relays,
DC motor controls & other DC devices with high surge currents |
90Ag, 10Pd
|
5.57 |
27 |
63 |
80 |
Low contact resistance,
operates with low con-tact force, resists sulfide formation |
Light duty relays,
alarms, AC & DC devices |
72Ag, 28Cu
|
5.24 |
84 |
79 |
85 |
Low cost, relatively
low contact resistance, good machining and spring properties |
Medium duty relays
and switches |
90Ag, 10Fe
|
5.37 |
90 |
54 |
74 |
High conductivity,
resists sticking, low contact resistance |
Thermostats, light
force medium duty switches |
75Au, 25Ag
|
9.12 |
16 |
45 |
77 |
Low contact resistance, operates
with low contact force, resists oxidation and other film formation |
Connectors, dry circuit to light
duty relays and switches, high reliability devices |
69Au, 25Ag, 6Pt
|
8.39 |
10 |
70 |
84 |
Excellent corrosion resistance,
excellent wear resistance |
Dry circuit to light duty switches
and relays, sliding contacts, high reliability devices |
35Pd, 30Ag, 10Au,
10Pt, 14Cu, 1Zn
|
6.13 |
5 |
90 |
94 |
Age hardened brush alloy, excellent
wear resist-ance, very good corrosion resistance |
Sliding contacts, potentiometers |
44Pd, 38Ag, 16Cu,
1Pt, 1Ni
|
5.69 |
6 |
90 |
94 |
Age hardened brush alloy, excellent
wear resist-ance, good corrosion resistance |
Sliding contacts, potentiometers |
|
|
|
