According to Protestants who hold that belief in Trinitarianism is necessary for salvation, what happens to those who assent but don't understand?

It seems some Protestants hold that belief in Trinitarianism is required for salvation. According to those who hold this, is there a distinction between Christians who assent to this and understand what Trinitarianism actually is, as opposed to Christians who assent to it but don't really understand what Trinitarianism is? For ex., I can say "Jesus is God," but the 'is' there is ambiguous. It could be taken in all sorts of senses, one of which is the 'official' Trinitarian sense. Yet it is not clear how many rank-and-file Protestants understand Trinitarianism to the extent that they could articulate it in detail. What's required for salvation in terms of depth of belief, according to Protestants who hold Trinitarian belief is required for salvation?