Capacitance Discharge Calculator

Electronics and Instrumentation

The following  provides equations and a calculator for determining capacitance discharge rate of a capacitor at known voltage and charge.

Vc = Vo, Q = CVo,

Initial Current, I = Vo/R

Where, Vc = Voltage, I Current and Q = charge

Capacitor Voltage = Q/c =V

 
 
 
 
 
 
  Capacitance Discharge Calculator  
           
  ENTER: Capacitor Value (uF)
The value of capacitance to be discharged. If there is a wide tolerance, enter the maximum value.
     
           
  ENTER: Initial Charge Voltage (V)
The voltage to which the capacitance is initially charged.
     
           
  ENTER: Safety Threshold Voltage (V)
The voltage threshold at which the capacitance is considered safely discharged. A typical value is 50V.
     
           
  EITHER        
  ENTER: Resistance Value (ohms)
The Ohmic value of the bleed resistor.
     
  A bleed resistar at this ohmic value        
  will ensure safe discharge within 0.0150627690651412 s    
  The initial power in the resistor is W    
  and the time constant of the discharge is s    
  The total energy discharged is  J    
  OR        
  ENTER: Discharge Time (s)
The time taken to reach safe discharge condition.
     
  To ensure safe discharge within this time        
  the bleed resistor should be at or below ohms    
  The initial power in the resistor is W    
  and the time constant of the discharge is s    
  The total energy discharged is  J    
           
           
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