rated for 50MHz up toward the TV frequencies

Below is a sentence from a book.


I saw they had only one transistor rated for 50MHz up toward the TV frequencies.


I can't catch what this sentence tries to say.
Especially, the part starting from 'rated for 50MHz... '.
Could you help me by dumbing it down?


I

I think you need someone who has a basic understanding of electronic engineering to assist in translating to a more basic sentence. I'm not knowledable in that area. In other words, probably many native speaker of English won't understand precisely what this means.

transistors are limited in the amounts of voltage and current they can handle without sustaining damage. Thus, they have ratings. The passage means that the transistor is good for use in 50MHz and upwards to the frequencies of television.