Silver tin oxide
Materials
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| EFO | EMO | EMB | CCB | |
|---|---|---|---|---|
| Oxide content (% massic) | 10 | 8 - 10 – 12 | 8 – 10 - 12 – 14 | 12 - 14 |
| SnO2 grain size | < 0,5 μ | 2 to 5 μ | ||
| SnO2 grain shape | Granular | |||
| Manufacturing process | Sintered – Extruded | Die Compacting | ||
NB : Alloys with 2, 3.3 or 5 % oxide are also available on special order.
Designation
METALOR manufactures a wide range of material and so a detailed description is essential, which must include :
| AgSnO2 |
|
|||
E |
M |
B |
8 |
|
Characteristics
| EFO | EMO | EMB | CCB | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Oxide content (% massic) | 10 | 8 | 10 | 12 | 8 | 10 | 12 | 14 | 12 | 14 |
| Theorical density g/cm³ | 9.98 | 10.08 | 9.98 | 9.88 | 10.12 | 10.03 | 9.95 | 9.87 | 9.95 | 9.85 |
| HV1 (annealed) | 95 | 55 | 60 | 65 | 60 | 65 | 70 | 75 | 95 | 105 |
| IACS (%) | 80 | 87.5 | 83 | 78 | 88 | 82.5 | 78.5 | 74 | 80 | 72 |
NB : Please contact us if you require material of different composition
Delivery conditions
| EFO | EMO | EMB | CCB | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oxide content (% massic) | 10 | 8 | 10 | 12 | 8 | 10 | 12 | 14 | 12 | 14 | |
| Wire |  |
X | X | X | X | X | X | ||||
| Profile |  |
X | X | X | X | X | X | X | X | ||
| Tip |  |
X | X | X | X | X | X | X | X | X | X |
NB : Please contact us if you require material of different composition
Assembly
h is between 10 and 30 % of H
Brazing alloys
| Resistance brazing | Flame brazing / Induced current brazing |
|---|---|
| Ag 150 / Cu 800 / P 50 | Ag 550 / Cu 210 / Zn 220 / Sn 20 |
| or any other type of brazing alloy compatible with the assembly | |
Electrical test results
Comparison of the characteristics of AgSnO2and AgCdO
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| Erosion AC4 50A | Contact resistance AC3 12A |
|---|---|
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| Welding force AC3 50 A | Erosion of all bridges |
Electrical tests performed on test machines or on switchgear (IEC 947 standard) confirm the excellent resistanceagainst erosion and the low welding tendency of AgSnO2 as compared with AgCdO. Temperature rise is similar.
The advantages of AgSnO2 are even more significant for capacitive application or for direct current.
Applications
Application field
Any type of switchgear requiring breaking capacity in AC or DC at 10 to 1 000 A and 24 to 600 V.
This material is recommended for its low welding tendency and for its resistance stability when subjected to intense make and break cycles.
Switchgear type
- Relays
- Contactors
- Engine starters
- Breakers
Uses
- Industrial automatisms
- Transport : cars, railways
- Lifts, forklift trucks
- Regulating devices, thermostats
Others conditions
We manufacture according to customer specification.
The radius, spherical shapes, tip thickness and brazing characteristics are defined in cooperation with the customer.