PTCSL03 PTC Thermistors Vishay / BC Components PTCSL03 PTC Thermistors are miniature, radial-leaded devices for overtemperature protection. PTCSL03 thermistors offer well-defined protection temperature levels, fast response time, and accurate resistance. These Vishay devices offer a wide range of protection temperatures from +80°C to +150°C. PTCSL03 provides overtemperature protection and control in a variety of applications, including industrial electronics, power supplies, motor drives, and more.