What kind of components are these?
They do not have any marking, one is bigger than the other.
Both have 4 pins, and 4 coils.
They come from an old Philips CRT.
Electronic – What coil-like components are these
componentsidentification
Related Solutions
Transistors in a TO-50 package commonly used in RF applications. The leads can be soldered flat onto the PCB, reducing lead inductance. Can be either some type or FET or BJT.
It's almost certainly a filter. Three terminal filters are common and popular, and can range from a tapped inductor, a pi filter, or an LCL filter depending. You'll likely find different values or topologies in each of those with different letters.
These are basically just potted inductors and capacitors arranged various ways, and can often be made just for a specific production run. Panasonic specifically is a large producer of these filters, so it makes sense that they would use custom parts produced just for one of their DVD drives. It's unlikely you'll find a datasheet, there probably was never a datasheet to begin with.
On the other hand, if you can measure inductance and capacitance, it is pretty easy to figure out the topology and frequency range of the filter.
Here is an example of what i mean:
They're really not much use and you can get any sort of filter you want in a nice SMD package these days off digikey anyway. But I am sure those are just potted filters. Not the most exciting answer, sorry!
Best Answer
These are common-mode chokes. They're 2 inductors which are magnetically coupled.
Yes, that makes them a transformer as well ! And you could use them as a transformer. But they're only 1:1 transformers so that limits the applications.
These are used to block high-frequency (common mode) signals from getting to the mains connection for example. You see them mainly in switcher mode mains power supplies