PN junction voltage drops in a Saturated BJT
If a NPN BJT is operating in the saturation mode, I usually take the following rough assumptions:


\$V_{be} = 0.7 \mbox{V}\$
\$V_{ce} = 0.2 \mbox{V}\$


This gives an slightly "assymetrical" \$V_{bc} = 0.5 \mbox{V}\$ because the transistor cannot become an "ideal" short.