A 30-year-old woman who barged into her kids’ father’s Harlem apartment Saturday — violating an order of protection — plunged to her death from the fifth-floor window just as cops arrived, police said.

She entered the apartment on Lenox Avenue at around noon, prompting the man’s roommate to call police, cops said.

As cops entered, the woman suddenly went out the window. Cops do not believe she was pushed.

The children, 10 and 11, were in the apartment at the time, but it was unclear if they witnessed their mom’s death plunge.