View rhrp1512 datasheet:

RHRP15120 Typical Performance Curves (Continued) 175 150 125 100 75 50 25 0 0 50 200 100 150 VR, REVERSE VOLTAGE (V) FIGURE 9. TYPICAL JUNCTION CAPACITANCE vs REVERSE VOLTAGE IMAX = 1A L = 40mH R < 0.1? EAVL = 1/2LI2 [VAVL/(VAVL - VDD)] Q1 AND Q2 ARE 1000V MOSFETs L R Q1 + VDD 130? 1M? DUT Q2 VAVL 12V CURRENT IL IL 130? SENSE I V VDD - 12V t0 t1 t2 t FIGURE 10. AVALANCHE ENERGY TEST CIRCUIT FIGURE 11. AVALANCHE CURRENT AND VOLTAGE WAVEFORMS 7-77 J C , JUNCTION CAPACITANCE (pF)