PTC (Positive Temperature Coefficient) Thermistors

PTC Thermistors are in stock with same-day shipping at Mouser from industry leading manufacturers. Mouser is an authorized distributor for many PTC thermistor manufacturers including Murata, TDK, Vishay & more. 

PTC thermistors (Positive Temperature Coefficient thermistors) are temperature-sensitive resistive components whose resistance increases significantly as temperature rises above a defined threshold. They provide reliable overcurrent protection, self-regulating heating characteristics, and temperature monitoring capabilities, helping improve system safety and operational reliability. These components are widely used in electronic and electrical systems where automatic protection and thermal management functions are required.

Types: The most common PTC thermistor types include switching PTC thermistors, resettable PTC thermistors, ceramic PTC thermistors, silicon PTC thermistors, motor protection PTC thermistors, surface-mount PTC thermistors, overcurrent protection PTC devices, and self-regulating heating PTC thermistors, each optimized for specific sensing, protection, and thermal control requirements.

Applications: PTC thermistors are widely used in motor protection systems, power supplies, battery packs, industrial automation equipment, consumer electronics, automotive systems, HVAC equipment, and overcurrent protection circuits to provide thermal monitoring, current limiting, and circuit protection functions.

Selection requirements: To choose PTC thermistors, evaluate resistance characteristics, switching temperature, hold current, trip current, voltage rating, response time, package type, environmental durability, and suitability for the intended electrical and operating conditions.

More...

Please view our large selection of PTC thermistors below.