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Rail Transit
Contact Materials for Rail Transit
High resistance to large current surge
Excellent electrical endurance
High reliability
Resistance to wear
Fast arc extinguishing speed
Used in high voltage DC circuit Breakers of intelligent vehicle, relays, switches and rail transit signal relay, etc.
Recommended Materials
Material Disgnation | 56#AgSnO₂ | 88#AgSnO₂ | 1#AgSnO₂ | 27#AgCdO |
|---|---|---|---|---|
| Ag Content(wt.%) | 88±1 | 85.5±1 | 90 | 85 |
| Density（g/cm³） | ≥9.75 | ≥9.6 | ≥9.8 | ≥9.75 |
| Elec.Resistivity（μΩ.cm） | ≤2.4 | ≤2.55 | ≤2.3 | ≤2.7 |
| Hardness HV | 80-110 | 95-115 | ≥55 | ≤100 |
Manufacturing process | Pre-oxidation-Sintering-Extruding | Internal Oxidation | Pre-oxidation | Internal Oxidation |