Carson City, Nev. — Ametherm released a new PTC circuit protection thermistor with an industry-high voltage rating of 680 V for inrush current limiting and overcurrent protection in applications such as welding equipment and plasma cutters with extremely high voltages from 480 V to 930 V.
The MCL20 500100-A thermistor features a 680-V voltage rating and handles a maximum inrush current of 20 A at maximum peak voltage. The device offers resistance at 25 °C of 50 Ω with a tolerance of 20 percent, a dissipation constant of 55.0 mW/°C, a heat capacity of 5.45 J/°C, and a thermal constant of 62 s. The thermistor operates over a wide temperature range of -50 °C to +150 °C.
The radial-leaded MCL20 500100-A features a 19-mm diameter, 9-mm maximum profile, and 7.8-mm lead spacing. “The thermistor provides designers with a more compact and cost-effective alternative to combining a power resistor, relay, and timer on one circuit to achieve the same functionality,” said Ametherm. The RoHS-compliant device is available with straight leads and outside or inside kinked leads.
Availability: The MCL20 500100-A PTC thermistor is available direct or through distributors such as Mouser. Samples and production quantities of the device are available now, with factory lead times of seven weeks.
Pricing: Volume pricing for U.S. delivery starts at $2.60 per piece in quantities of 1,000.