No, your wudu does not break if a non-Mahram sees your hair.
According to the provided reference, if a non-Mahram man sees a woman's hair accidentally, and there was no negligence on her part, she is not sinful. Importantly, this incident does not invalidate her wudu, nor does it invalidate his. This is because there is no evidence in Sharia indicating that a woman's hair is among the nullifiers of wudu.
In summary:
- Wudu remains valid: A glimpse of a woman's hair by a non-Mahram does not nullify wudu.
- Accidental exposure: If the exposure was accidental and without negligence, there is no sin.
- Sharia evidence: No evidence in Sharia law states that seeing a woman's hair breaks wudu.