Download the MZ31-05P221N650 datasheet PDF.
This datasheet also covers the MZ31-03M101N500 variant, as both devices belong to the same ptc thermistor family and are provided as variant models within a single manufacturer datasheet.
Note: The manufacturer provides a single datasheet file (MZ31-03M101N500-ElectronicAlliance.pdf) that lists specifications for multiple related part numbers.