(Knowles: Itasca, IL) — Knowles Corp., a market leader and global provider of advanced micro-acoustic microphones and speakers, audio solutions, and high-performance capacitors and RF products, announces the QAS Series, a new line of RC-type arc suppressor/snubber components that extend the operating life of electronic and electromechanical devices.
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The QAS product line includes 24 devices with:
• Capacitance values of up to 1.0uF
• Resistor values up to 680 ohms
• Rated voltage options up to 1600 Vdc/660 Vac, 60 Hz
• Operating temperature range –55°C to +85°C at full rated voltage
When the contacts in an arc suppression circuit open, a voltage is applied across the capacitor instead of the relay contacts. This prevents arcing because the capacitor charges faster than the contacts open. When the contacts close, the inrush current from the charged capacitor and source can exceed the safe conductance of the contacts. The resistor in the network limits the inrush current significantly, reducing the arc produced at contact closure, and extends the service life of the contacts. In practical applications, the RC network is typically connected across the relay contacts for DC voltage; for AC voltage, it’s connected across the load.
QAS Series devices are available now from Knowles’ authorized distributors. To learn more about Knowles’ Cornell Dubilier brand QAS devices, visit https://www.cde.com/new-product/QAS/.