I'm trying to identify a part I removed from a compact fluorescent lamp manufactured around 9 years ago (date on the PCB is 17.12.01).
It is a gray hexahedron and it's 7 mm wide, 2 mm long and about 4.5 mm high. Contacts are on the 2 mm sides.
The inscription on it says in the first line 2n2 and in the second line 630.
Judging by the inscription, device seems to be manufactured in a long sheet on which numbers were printed and then cut into 5 mm high segments.
At first I thought it could be some sort of capacitor (PCB has capacitor mark on its location), but after some testing, I was unable to charge it and then measure its voltage (on the other hand, it could be that it has very low capacitance so could discharge itself in the time it takes me to switch my multimeter form ohmmeter mode to voltmeter mode). Also, part which is obviously resistor was next to the unknown device and it too had capacitor mark on PCB.
I did some research on the Internet, but as far as I can tell, 2n2630 is a transistor and this definitely does not look like a transistor, so I'm looking here for ideas on what it could be.
EDIT
I finally managed to get a nice picture of the part on 1 mm grid. Here it is:
Best Answer
I'd say its a Capacitor with 2,2nF capacity and voltage up to 630 V. A usual multimeter has 10µA (or more) current flow, which will discharge this low capacity very very quickly - no chance for reading a voltage here.