This part is a kind of semiconductor called NTC5D-9.

Function of this product has (NTCxD-9) NSP Power Type NTC Thermistors.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

NSP POWER TYPE NTC THERMISTORS * Introduction: ••Vatronics is Suitable for the use in switching power supply, UPS power supply, electric heaters, electronic energy-saving lighting, electronic ballast and electronic devices for power supply circuit protection; and for the use in color video tube, incandescent bulb and other lighting devices for filament protection; it features small size, high power, strong resistance to surge current, quick response, high B value, low residue resistance, long service life, high reliability, high security and wide applications. * Applications: ••Suitable for the use in switching power supply, UPS power supply, electric heaters, electronic energy-saving lighting, electronic ballast and electronic devices for power supply circuit [ ... ]

NTC5D-9 PDF Datasheet Download