Ametherm just announced a circuit protection thermistor that is said to offer the industry's smallest diameter for a UL-approved device with a maximum continuous current rating of 4.0 A and energy rating of 50 J. Previously, designers had to rely on devices with larger diameters of 22.0 mm to achieve the high current and energy ratings of the new SL15 60004.
Offering a radial lead package with a maximum diameter of only 15.0 mm (±0.5 mm), the device released today saves board space, lowers costs, limits excess circuit board heat, and enables faster reset times.
The small size and high current rating of the SL15 60004 make it ideal for fractional horsepower motor drives, power supplies, and vacuum cleaners. The device features a resistance of 60.0 Ω, dissipation constant of 15 mW/°C, and thermal time constant of 45 s. The thermistor can handle body temperatures up to 194 °C at 100% of its maximum current rating.
The SL15 60004 circuit protection thermistor is available direct or through distributors such as Digi-Key and Mouser. Samples and production quantities of the devices are available now, with factory lead times of eight weeks.