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New PTC Thermistors by Ametherm Offer Industry's Highest Voltage Rating and Lowest Resistance for Pre-Charge CircuitsCARSON CITY, Nev., Nov. 15, 2018 (GLOBE NEWSWIRE) -- Ametherm introduced today a new series of ceramic PTC circuit protection thermistors that combine the industry’s highest voltage rating with lowest available resistance. The CL20 Series PTC Thermistors provide an alternative to fixed resistors and are optimized for inrush current limiting in pre-charge circuits, degaussing circuits, heater applications, in addition to over-current protection. The PTC thermistors released today deliver voltage ratings up to 1200 VDC and maximum energy ratings to 600 J. The devices offer five resistance values at 25 °C from 7.0 W to 100.0 W — with tolerance down to 25% — to accommodate a variety of pre-charge times. These resistance values remain unchanged over the operating temperature range of -40 °C to +110 °C. The CL20 Series of PTC thermistors provides stability and reliability in high-voltage applications, and can withstand hundreds of hits of maximum inrush current without degrading. PTC thermistors do not require reset time and therefore will not result in large inrush current during repetitive use, as their resistance remains in a high state. Devices in the CL20 Series of PTC thermistors feature a dissipation constant of 22.5 mW/°C, heat capacity from 2.0 J/°C to 3.45J/°C, transition temperature of +120 °C and a thermal time constant of 65 s. Switch and continuous currents for these PTC thermistors range from 450 mA to 1750 mA and 225 mA to 850 mA respectively. The radial-leaded CL20 Series offers easy PCB mounting, have a diameter of 22 mm, straight leads, and most come with optional outside or inside kinked leads. Ametherm also offers smaller PTC circuit protection devices with diameters from 6 mm to 20 mm. Device Specification Table:
For more information on Ametherm’s products or to request a sample, visit www.ametherm.com. Or call 800-808-2434 (toll free in the United States) or 775-884-2434 from outside the U.S. and Canada. Follow Ametherm online at http://www.ametherm.com/blog/. About Ametherm Ametherm Contact: A photo accompanying this announcement is available at //www.globenewswire.com/NewsRoom/AttachmentNg/38517a8d-587c-41d4-b74a-b91ce22f8f8e |