Silver-based inner electrodes in flat chip resistors can lose conductivity when the silver reacts with sulfur in a high-sulfur environment. The electrodes can lose all conductivity and disconnect the circuit as sulfuration continues. KOA Speer has developed a complete line of anti-sulfur chip resistors and arrays to protect against sulfuration of the resistor electrodes.
Sulfuration is a phenomenon that occurs in resistors with silver-based inner electrodes. When a resistor is used in a high-sulfur atmosphere, the sulfur molecules can migrate between the protective film and the outer electrode to the inner electrode, where they react to form silver sulfide. Silver sulfide is an insulator, and the resistance of the device increases toward an open circuit. KOA's product line includes resistors with sulfuration-resistant inner electrodes.
Needle crystals of
silver sulfide (Ag2S)
- ±2%, ±5% General Purpose Flat Chip Resistor
- ±0.5%, ±1% High Precision Flat Chip Resistor
- Zero ohm with max. resistance of 50mΩ
- ±0.5%, ±1% Ultra Precision Flat Chip Resistor
- High Voltage Flat Chip Resistor for Automotive
- High Voltage Flat Chip Resistor
- Surge Resistor with 10x pulse power capability
- Anti-Pulse & Anti-Surge Current Flat Chip Resistors
- Wide Terminal, Reverse Geometry Resistor
- Concave, Square Corner Isolated Chip Array Network
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