# PN junction voltage drops in a Saturated BJT

Let's say we've got our BJT operating in its saturation mode. Can we make (a rough) approximation now and make calculations for the circuit assuming that both Ube=0.7V and Ubc=0.7V (for an npn). Or do these values change in sat mode?

• $V_{be} = 0.7 \mbox{V}$
• $V_{ce} = 0.2 \mbox{V}$
This gives an slightly "assymetrical" $V_{bc} = 0.5 \mbox{V}$ because the transistor cannot become an "ideal" short.