Thermal Resistance of SCR Solution

STEP 0: Pre-Calculation Summary
Formula Used
Thermal Resistance = (Junction Temperature-Ambient Temperature)/Power Dissipated by Heat
θ = (Tjunc-Tamb)/Pdis
This formula uses 4 Variables
Variables Used
Thermal Resistance - (Measured in Kelvin per Watt) - Thermal resistance of SCR is defined as the the ratio of the temperature difference between the two faces of a material to the rate of heat flow per unit area in a SCR.
Junction Temperature - (Measured in Kelvin) - Junction temperature is defined as the temperature of the junction of a SCR due to movement of charge.
Ambient Temperature - (Measured in Kelvin) - Ambient temperature is defined as the temperature of the surroundings of the SCR.
Power Dissipated by Heat - (Measured in Watt) - Power Dissipated by Heat in SCR is defined as the average of the total heat generated at the junctions of the SCR due to movement of charge.
STEP 1: Convert Input(s) to Base Unit
Junction Temperature: 10.2 Kelvin --> 10.2 Kelvin No Conversion Required
Ambient Temperature: 5.81 Kelvin --> 5.81 Kelvin No Conversion Required
Power Dissipated by Heat: 2.933 Watt --> 2.933 Watt No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
θ = (Tjunc-Tamb)/Pdis --> (10.2-5.81)/2.933
Evaluating ... ...
θ = 1.49676099556768
STEP 3: Convert Result to Output's Unit
1.49676099556768 Kelvin per Watt --> No Conversion Required
FINAL ANSWER
1.49676099556768 1.496761 Kelvin per Watt <-- Thermal Resistance
(Calculation completed in 00.004 seconds)

Credits

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Created by Parminder Singh
Chandigarh University (CU), Punjab
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Verified by Rachita C
BMS College Of Engineering (BMSCE), Banglore
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Worst Case Steady State Voltage across First Thyristor in Series Connected Thyristors
​ LaTeX ​ 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
​ LaTeX ​ 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
​ LaTeX ​ Go Collector Base Leakage Current = Collector Current-Common-Base Current Gain*Collector Current
Thermal Resistance of SCR
​ LaTeX ​ Go Thermal Resistance = (Junction Temperature-Ambient Temperature)/Power Dissipated by Heat

SCR Characteristics Calculators

Derating Factor of Series Connected Thyristor String
​ LaTeX ​ 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
​ LaTeX ​ Go Collector Base Leakage Current = Collector Current-Common-Base Current Gain*Collector Current
Power Dissipated by Heat in SCR
​ LaTeX ​ Go Power Dissipated by Heat = (Junction Temperature-Ambient Temperature)/Thermal Resistance
Thermal Resistance of SCR
​ LaTeX ​ Go Thermal Resistance = (Junction Temperature-Ambient Temperature)/Power Dissipated by Heat

Thermal Resistance of SCR Formula

​LaTeX ​Go
Thermal Resistance = (Junction Temperature-Ambient Temperature)/Power Dissipated by Heat
θ = (Tjunc-Tamb)/Pdis

What are losses in SCR?

All diodes and transistors are characterized by power losses due to switching and conduction. Switching losses occur during the interval between the on- and off-states of a junction, when there is both a voltage across the device terminals and a current flowing through it. Conduction losses are due to the device’s internal resistance that, no matter how low it is, will result in a power loss when a current is flowing. Even in the off-state, losses due to transistor leakage currents can be significant in devices such as microprocessors.

How to Calculate Thermal Resistance of SCR?

Thermal Resistance of SCR calculator uses Thermal Resistance = (Junction Temperature-Ambient Temperature)/Power Dissipated by Heat to calculate the Thermal Resistance, The Thermal resistance of SCR formula is defined as the ratio of the temperature difference between the two faces of a material to the rate of heat flow per unit area in a SCR. Thermal Resistance is denoted by θ symbol.

How to calculate Thermal Resistance of SCR using this online calculator? To use this online calculator for Thermal Resistance of SCR, enter Junction Temperature (Tjunc), Ambient Temperature (Tamb) & Power Dissipated by Heat (Pdis) and hit the calculate button. Here is how the Thermal Resistance of SCR calculation can be explained with given input values -> 1.496761 = (10.2-5.81)/2.933.

FAQ

What is Thermal Resistance of SCR?
The Thermal resistance of SCR formula is defined as the ratio of the temperature difference between the two faces of a material to the rate of heat flow per unit area in a SCR and is represented as θ = (Tjunc-Tamb)/Pdis or Thermal Resistance = (Junction Temperature-Ambient Temperature)/Power Dissipated by Heat. Junction temperature is defined as the temperature of the junction of a SCR due to movement of charge, Ambient temperature is defined as the temperature of the surroundings of the SCR & Power Dissipated by Heat in SCR is defined as the average of the total heat generated at the junctions of the SCR due to movement of charge.
How to calculate Thermal Resistance of SCR?
The Thermal resistance of SCR formula is defined as the ratio of the temperature difference between the two faces of a material to the rate of heat flow per unit area in a SCR is calculated using Thermal Resistance = (Junction Temperature-Ambient Temperature)/Power Dissipated by Heat. To calculate Thermal Resistance of SCR, you need Junction Temperature (Tjunc), Ambient Temperature (Tamb) & Power Dissipated by Heat (Pdis). With our tool, you need to enter the respective value for Junction Temperature, Ambient Temperature & Power Dissipated by Heat 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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