The WMZ12A-50S201PLS400B25-G5B with PTC Thermistors Through Hole RoHS is a high-performance part manufactured by Tyohm. It is a semiconductor device that acts as a temperature-sensitive resistor. It is constructed with a positive temperature coefficient (PTC) thermistor, meaning that its resistance will go up with increasing temperature. It is an RoHS-compliant part that is designed to be used in through-hole mounting, making this an ideal choice for applications such as temperature sensing, over-temperature protection, and current limiting. The WMZ12A-50S201PLS400B25-G5B has an operating temperature range of -40°C to +120°C, and a thermal response time of 8.1 seconds in water.