Leakage Current of Collector-Base Junction Solution

STEP 0: Pre-Calculation Summary
Formula Used
Collector Base Leakage Current = Collector Current-Common-Base Current Gain*Collector Current
ICBO = IC-α*IC
This formula uses 3 Variables
Variables Used
Collector Base Leakage Current - (Measured in Ampere) - Collector Base Leakage Current is a current that flows in a bipolar junction transistor (BJT) between the collector and base terminals when the transistor is in its reverse-biased condition.
Collector Current - (Measured in Ampere) - Collector Current refers to the current that flows between the collector and emitter terminals when the SCR is in its conducting or ON state.
Common-Base Current Gain - Common-Base Current Gain is defined as the change in collector current divided by the change in emitter current when the base-to-collector voltage is constant.
STEP 1: Convert Input(s) to Base Unit
Collector Current: 100 Ampere --> 100 Ampere No Conversion Required
Common-Base Current Gain: 0.7 --> No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
ICBO = IC-α*IC --> 100-0.7*100
Evaluating ... ...
ICBO = 30
STEP 3: Convert Result to Output's Unit
30 Ampere --> No Conversion Required
FINAL ANSWER
30 Ampere <-- Collector Base Leakage Current
(Calculation completed in 00.004 seconds)

Credits

Created by Devyaani Garg
Shiv Nadar University (SNU), Greater Noida
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5 SCR Performance Parameters Calculators

Worst Case Steady State Voltage across First Thyristor in Series Connected Thyristors
Go Worst Case Steady State Voltage = (Resultant Series Voltage of Thyristor String+Stablizing Resistance*(Number of Thyristors in Series-1)*Off State Current Spread)/Number of Thyristors in Series
Derating Factor of Series Connected Thyristor String
Go Derating Factor of Thyristor String = 1-Resultant Series Voltage of Thyristor String/(Worst Case Steady State Voltage*Number of Thyristors in Series)
Leakage Current of Collector-Base Junction
Go Collector Base Leakage Current = Collector Current-Common-Base Current Gain*Collector Current
Power Dissipated by Heat in SCR
Go Power Dissipated by Heat = (Junction Temperature-Ambient Temperature)/Thermal Resistance
Thermal Resistance of SCR
Go Thermal Resistance = (Junction Temperature-Ambient Temperature)/Power Dissipated by Heat

16 SCR Characteristics Calculators

Worst Case Steady State Voltage across First Thyristor in Series Connected Thyristors
Go Worst Case Steady State Voltage = (Resultant Series Voltage of Thyristor String+Stablizing Resistance*(Number of Thyristors in Series-1)*Off State Current Spread)/Number of Thyristors in Series
Thyristor Commutation Voltage for Class B Commutation
Go Thyristor Commutation Voltage = Input Voltage*cos(Angular Frequency*(Thyristor Reverse Bias Time-Auxiliary Thyristor Reverse Bias Time))
Derating Factor of Series Connected Thyristor String
Go Derating Factor of Thyristor String = 1-Resultant Series Voltage of Thyristor String/(Worst Case Steady State Voltage*Number of Thyristors in Series)
Time Period for UJT as Oscillator Thyristor Firing Circuit
Go Time Period of UJT as Oscillator = Stablizing Resistance*Capacitance*ln(1/(1-Intrinsic Stand-off Ratio))
Emitter Current for UJT based Thyristor Firing Circuit
Go Emitter Current = (Emitter Voltage-Diode Voltage)/(Emitter Resistance Base 1+Emitter Resistance)
Circuit Turn off Time Class B Commutation
Go Circuit Turn Off Time Class B Commutation = Thyristor Commutation Capacitance*Thyristor Commutation Voltage/Load Current
Frequency of UJT as Oscillator Thyristor Firing Circuit
Go Frequency = 1/(Stablizing Resistance*Capacitance*ln(1/(1-Intrinsic Stand-off Ratio)))
Thyristor Conduction Time for Class A Commutation
Go Thyristor Conduction Time = pi*sqrt(Inductance*Thyristor Commutation Capacitance)
Peak Current Class B Thyristor Commutation
Go Peak Current = Input Voltage*sqrt(Thyristor Commutation Capacitance/Inductance)
Intrinsic Stand-off Ratio for UJT based Thyristor Firing Circuit
Go Intrinsic Stand-off Ratio = Emitter Resistance Base 1/(Emitter Resistance Base 1+Emitter Resistance Base 2)
Circuit Turn off Time Class C Commutation
Go Circuit Turn Off Time Class C Commutation = Stablizing Resistance*Thyristor Commutation Capacitance*ln(2)
Leakage Current of Collector-Base Junction
Go Collector Base Leakage Current = Collector Current-Common-Base Current Gain*Collector Current
Power Dissipated by Heat in SCR
Go Power Dissipated by Heat = (Junction Temperature-Ambient Temperature)/Thermal Resistance
Thermal Resistance of SCR
Go Thermal Resistance = (Junction Temperature-Ambient Temperature)/Power Dissipated by Heat
Discharging Current of dv-dt Protection Thyristor Circuits
Go Discharging Current = Input Voltage/((Resistance 1+Resistance 2))
Emitter Voltage to Turn On UJT based Thyristor Firing Circuit
Go Emitter Voltage = Emitter Resistance Base 1 Voltage+Diode Voltage

Leakage Current of Collector-Base Junction Formula

Collector Base Leakage Current = Collector Current-Common-Base Current Gain*Collector Current
ICBO = IC-α*IC

How is the above formula related to thyristors?

A thyristor can be considered as two complementary transistors, one PNP transistor Q1 and the other NPN transistor Q2. The above formula can be used to calculate the leakage current of the collector-base junction of each transistor of the thyristor and these calculations can further be used to design circuits of thyristors.

How to Calculate Leakage Current of Collector-Base Junction?

Leakage Current of Collector-Base Junction calculator uses Collector Base Leakage Current = Collector Current-Common-Base Current Gain*Collector Current to calculate the Collector Base Leakage Current, The Leakage Current of Collector-Base Junction is the difference between the collector current and the common base current gain of the transistor (α) times the emitter current. α is the ratio of IC to IE . Collector Base Leakage Current is denoted by ICBO symbol.

How to calculate Leakage Current of Collector-Base Junction using this online calculator? To use this online calculator for Leakage Current of Collector-Base Junction, enter Collector Current (IC) & Common-Base Current Gain (α) and hit the calculate button. Here is how the Leakage Current of Collector-Base Junction calculation can be explained with given input values -> 30 = 100-0.7*100.

FAQ

What is Leakage Current of Collector-Base Junction?
The Leakage Current of Collector-Base Junction is the difference between the collector current and the common base current gain of the transistor (α) times the emitter current. α is the ratio of IC to IE and is represented as ICBO = IC-α*IC or Collector Base Leakage Current = Collector Current-Common-Base Current Gain*Collector Current. Collector Current refers to the current that flows between the collector and emitter terminals when the SCR is in its conducting or ON state & Common-Base Current Gain is defined as the change in collector current divided by the change in emitter current when the base-to-collector voltage is constant.
How to calculate Leakage Current of Collector-Base Junction?
The Leakage Current of Collector-Base Junction is the difference between the collector current and the common base current gain of the transistor (α) times the emitter current. α is the ratio of IC to IE is calculated using Collector Base Leakage Current = Collector Current-Common-Base Current Gain*Collector Current. To calculate Leakage Current of Collector-Base Junction, you need Collector Current (IC) & Common-Base Current Gain (α). With our tool, you need to enter the respective value for Collector Current & Common-Base Current Gain and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
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