This document is a catalog for Murata Manufacturing POSISTORr resistors. It mainly introduces the characteristics of the product, including typical specifications, application circuit, application cases, etc.
The POSISTORr series are PTC thermistors designed for over‑current and over‑heat protection. The catalog describes their constant resistance‑temperature behavior, Curie‑point operation, and how they function as both a fixed resistor and a resettable fuse. It also outlines safety cautions for handling, mounting, and soldering.
The document includes part‑numbering, basic electrical characteristics, a selection guide, application matrices for various power‑supply and communication‑line uses, and detailed specifications such as maximum voltage, trip current, resistance at 25 °C, body dimensions, and Curie‑point temperatures. Package and lead‑type options are listed for designers to choose the appropriate part.
| Body Diameter | 18.5 mm |
|---|---|
| Curie Point | 120 °C |
In normal operation the device carries about 200 mA.