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Thermal Resistance of SCR Formula

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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. Check FAQs

θ = \frac{T junc - T amb}{P dis}

θ - Thermal Resistance?T_junc - Junction Temperature?T_amb - Ambient Temperature?P_dis - Power Dissipated by Heat?

Thermal Resistance of SCR Example

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Here is how the Thermal Resistance of SCR equation looks like with Values.

Here is how the Thermal Resistance of SCR equation looks like with Units.

Here is how the Thermal Resistance of SCR equation looks like.

1.4968 = \frac{10.2 - 5.81}{2.933}

1.4968K/W = \frac{10.2K - 5.81K}{2.933W}

1.4968 = \frac{10.2 - 5.81}{2.933}

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Thermal Resistance of SCR Solution

Follow our step by step solution on how to calculate Thermal Resistance of SCR?

FIRST Step Consider the formula

θ = \frac{T junc - T amb}{P dis}

Next Step Substitute values of Variables

∴

θ = \frac{10.2K - 5.81K}{2.933W}

Next Step Prepare to Evaluate

∴

θ = \frac{10.2 - 5.81}{2.933}

Next Step Evaluate

∴

θ = 1.49676099556768K/W

LAST Step Rounding Answer

∴

θ = 1.4968K/W

Thermal Resistance of SCR Formula Elements

Variables

Thermal Resistance

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.

Symbol: θ

Measurement: Thermal ResistanceUnit: K/W

Note: Value can be positive or negative.

Formulas to find Thermal Resistance

Junction Temperature

Junction temperature is defined as the temperature of the junction of a SCR due to movement of charge.

Symbol: T_junc

Measurement: TemperatureUnit: K

Note: Value should be greater than 0.

Formulas to find Junction Temperature

Ambient Temperature

Ambient temperature is defined as the temperature of the surroundings of the SCR.

Symbol: T_amb

Measurement: TemperatureUnit: K

Note: Value should be greater than 0.

Formulas to find Ambient Temperature

Power Dissipated by Heat

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.

Symbol: P_dis

Measurement: PowerUnit: W

Note: Value should be greater than 0.

Formulas to find Power Dissipated by Heat

Other formulas in SCR Performance Parameters category

Go Derating Factor of Series Connected Thyristor String

DRF = 1 - \frac{V string}{V ss \cdot n}

Go Leakage Current of Collector-Base Junction

I CBO = I C - α \cdot I C

Go Power Dissipated by Heat in SCR

P dis = \frac{T junc - T amb}{θ}

Go Worst Case Steady State Voltage across First Thyristor in Series Connected Thyristors

V ss = \frac{V string + R stb \cdot (n - 1) \cdot ΔI D}{n}

How to Evaluate Thermal Resistance of SCR?

Thermal Resistance of SCR evaluator uses Thermal Resistance = (Junction Temperature-Ambient Temperature)/Power Dissipated by Heat to evaluate 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 evaluate Thermal Resistance of SCR using this online evaluator? To use this online evaluator for Thermal Resistance of SCR, enter Junction Temperature (T_junc), Ambient Temperature (T_amb) & Power Dissipated by Heat (P_dis) and hit the calculate button.

FAQs on Thermal Resistance of SCR

What is the formula to find Thermal Resistance of SCR?

The formula of Thermal Resistance of SCR is expressed as Thermal Resistance = (Junction Temperature-Ambient Temperature)/Power Dissipated by Heat. Here is an example- 1.496761 = (10.2-5.81)/2.933.

How to calculate Thermal Resistance of SCR?

With Junction Temperature (T_junc), Ambient Temperature (T_amb) & Power Dissipated by Heat (P_dis) we can find Thermal Resistance of SCR using the formula - Thermal Resistance = (Junction Temperature-Ambient Temperature)/Power Dissipated by Heat.

Can the Thermal Resistance of SCR be negative?

Yes, the Thermal Resistance of SCR, measured in Thermal Resistance can be negative.

Which unit is used to measure Thermal Resistance of SCR?

Thermal Resistance of SCR is usually measured using the Kelvin per Watt[K/W] for Thermal Resistance. Degree Fahrenheit hour per Btu (IT)[K/W], Degree Fahrenheit Hour per Btu (th)[K/W], Kelvin per Milliwatt[K/W] are the few other units in which Thermal Resistance of SCR can be measured.

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Thermal Resistance of SCR Formula

Thermal Resistance of SCR Example

Thermal Resistance of SCR Solution

Thermal Resistance of SCR Formula Elements

Other formulas in SCR Performance Parameters category

How to Evaluate Thermal Resistance of SCR?

FAQs on Thermal Resistance of SCR

Variable Name