What is this device marked VR1?

[semiRocket]

Hi,

Found this inside a DSL splitter between line wires, seems like some kind of suppressor device, anyone knows exactly what it is?

There are no markings on it.

[semiRocket]

Or this device marked as 'G'. Gas discharge tube?

[chipwitch]

I assume by "gas discharge tube" they're referring to a method of lightning/surge suppression, but I could be wrong.

[nanofrog]

VR typically refers to a variable resistor (or varistor). 2 leads usually indicates a rheostat, but in this case, I think a MOV (metal oxide varistor) is the actual part being used. They're more commonly a disk shape with parallel leads, they may have located an axial version to fit the enclosure.

And given the photo of the second photo, I'd say it's a gas discharge tube.

[metrologist]

I've seen VR used for voltage regulators too. I wonder if it is a zenor diode?

[helius]

Considering the placement between pins of a twisted-pair, I would bet it's a TVS. TVS is effectively two back-to-back zeners, so I suppose the symbol makes sense.