Question to anyone : why main/all diff probe are rated "high voltage" ?
Who are the guy that need a diff probe to be proof up to 600V ? (just an ex.)
PCB level is 5Vmax...
so what's the heck to pay for a diff. probe that handle 300V/600V ?
Those high voltages are managed by electrician... quite far from electronician dealing with V<10V
There are two classes of diff probes. High voltage, moderate bandwidth differential probes up to 100 MHz or so going up to hundreds of volts, and high frequency low voltage differential probes that go up to a few GHz. There used to be a third class of low bandwidth, very low voltage differential probes/preamplifiers like the
Tek ADA400A, but not many of those are designed anymore. The first group is often used for power supply design, like the primary side of a flyback converter. Or in inverters. They are also sort-of usable for lower voltage circuits at the expense of noise and bulky size. The second group is generally used for fast differential digital buses like USB or PCI Express. And the last group was mostly used for low level analog circuits like analog audio, or for magnetic read heads like on tape drives and hard drives.
The high voltage type is the easiest to make so I guess that's why the low end brands are just making those. All the big scope brands are also selling low voltage, high frequency differential probes, but you may not like the price.