Reference: Fataawa Ramadhaan – Volume 2, Page 455, Fatwa No.385
Fataawa wa Rasaa.il Samaahatu ash-Shaykh Muhammad ibn Ibraaheem Aal-ash-Shaykh – Volume 4, Page 190-191
Question: A man came to his wife during the day in Ramadhaan without having skin contact with her. Then he ejaculated semen. We wish to know what the ruling is for him?
Response: We inform you that your fast that day is nullified and it is obligatory that you make it up and there is no expiation for you to make as this is only particular to sexual intercourse.