The effect of pulse amplitude on the ferroelectric and switching properties of pulsed laser deposited Bab>0.8b>Srb>0.2b>TiOb>3b> thin films has been studied. The structural and morphological analysis revealed that the films had a well crystallized perovskite phase and grain size of about 30-40 nm. A well saturated P-E hysteresis loop was observed with a remnant polarization (m>Pm>b>m>rm>b>) 鈮?#xA0;4.8 渭C/cm2 and a coercive field 鈮?#xA0;100 kV/cm at a frequency of 1 kHz. The m>Pm>b>m>rm>b> has been found to be decreased only 4.3%after passing 8.0 脳 108 cycles. The analysis of switching response with nucleation limited switching model reveals that characteristic switching time (m>tm>b>0b>) variance is due to the random distribution of the local electric fields. The peak value of polarization current and m>tm>b>0b> exhibits exponential dependence on reciprocal of pulse amplitude.