A Protection from Abuse case or a PFA case can be dismissed in Pennsylvania. It will depend on the circumstances at hand. The case could be dismissed because the plaintiff fails to meet his or her burden if the case goes to trial, and the judge finds that the plaintiff did not meet the burden of proof that is by a preponderance of the evidence in making the claims against the defendant.
A case can be dismissed for other reasons. It could be dismissed for a lack of prosecution if the plaintiff fails to appear to court and the PFA defense attorney makes a motion to the court that the matter be dismissed. The case could be dismissed by mutual agreement between the parties, sometimes after a negotiated resolution.
The short answer is, yes, Protection from Abuse case can be dismissed in Pennsylvania, as to why that would take place or how that needs to take place, an experienced Protection from Abuse attorney in Pennsylvania will be able to help you best understand and navigate the PFA process and they should be involved from as early as possible in the case.