I have no clue of the PCB where this component was.
The reference H400 60 and a logo that is unreadable are located in the top of the package.
I didn't found any datasheet or valuable information in google.
There's a metal holder and a small cylinder inside the part.
The small cilinder appears to be made by two materials.
The inside material is condutive.
The outside material is isolant.
I can't measure any capacitance in the cylinder.
Thanks in advance.
Best Answer
This looks very much a like a power PTC used for example for demagnetizing cathode-ray tubes. The ceramic gets high-resistance when it heats up.
And indeed, googling for "H400 PTC" yields e.g. this link at a random seller offering a component looking alike, but I was unable to quickly find a data sheet.