Does protected sex hold a risk of hiv transmission to a man? can a man be infected with hiv through blowjob?

Yes: Oral sex, although rarely can transmit HIV. Protected sex is safe, and then nothing 100%

Exposure: to bodily fluids have potential for HIV transmission no matter how low.

Yes man: Can be infected that way if the woman has HIV as saliva is a body fluid and carries the virus.

HIV transmission: Although use of a condom greatly reduces the risk of HIV transmission, it is still possible. There can be breaks in the condom or bodily fluids can make contact in areas that the condom does not cover. A man can be infected with HIV from a blow job, although the rate of infection is less than with unprotected vaginal intercourse.

Possibly : Yes to both. But it is an exceedingly rare occurrence. Open sores in the mouth would be required and condoms are quoted to bring something along the lines of 99% percent effective. But remember if you fall into that 1% or even .1% it's a 100% for you. Be safe.