Can back brace limit back pain while working and if yes what types r the best?

Yes: I will limit motion and thus strain on your back. I can't suggest a specific brand but i would suggest one you get from your doctor not an off the shelf one at walmart. I personally use products from rs medical www.Rsmedical.Com/‎.

Restricts mobility: Back braces can limit pain by decreasing mobility thereby lessening movement over painful vertebrae and joints. However, they can also cause disuse atrophy in muscle used to support you lumbar spine thereby making in more unstable. You might serve yourself better by increasing you core muscle strength by practicing yoga or tai chi if you can.