Electronics Engineering

Surface-Mount Resistor Pulse Power Derating Advisor Calculator

Surface-Mount Resistor Pulse Power Derating Advisor engineering calculator.

Quick Answer

Calculate Surface-Mount Resistor Pulse Power Derating Advisor

Calculator

Derated Pulse Power Limit (W)
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Result Interpretation

Surface-Mount Resistor Pulse Power Derating Advisor Calculator computes Derated Pulse Power Limit in W using the defined engineering formula and the input values provided.

Worked Example

Verified calculation

Given:

  • Junction-to-Case Thermal Capacitance = 2.0E-6
  • Rated Continuous Power = 0.1
  • Junction-to-Case Thermal Resistance = 150
  • Pulse Duration = 0.001

Expected Result:

  • Derated Pulse Power Limit = 0.1439901120638

Engineering Interpretation:

Under the given input conditions, the calculated result is: Derated Pulse Power Limit = 0.1439901120638 W.

The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from automatically validated test cases.

Formula / Method

derated pulse power limit = rated continuous power * (1 + (junction-to-case thermal resistance * junction-to-case thermal capacitance * log(1 + pulse duration / (junction-to-case thermal resistance * junction-to-case thermal capacitance))) / pulse duration)

Formula family: formula_electronics_smd_resistor_pulse_power_derating_advisor

Variables

SymbolLabelRoleDescription
P_rated Rated Continuous Power INPUT Rated Continuous Power
R_th_jc Junction-to-Case Thermal Resistance INPUT Junction-to-Case Thermal Resistance
C_th_jc Junction-to-Case Thermal Capacitance INPUT Junction-to-Case Thermal Capacitance
t_pulse Pulse Duration INPUT Pulse Duration
pulse_power_limit Derated Pulse Power Limit OUTPUT Derated Pulse Power Limit

Calculation Steps

  1. Enter the rated continuous power in W.
  2. Enter the junction-to-case thermal resistance in K/W.
  3. Enter the junction-to-case thermal capacitance in J/K.
  4. Enter the pulse duration in s.
  5. Step 1: Compute derated pulse power limit.
  6. Read the derated pulse power limit (W) from the results.

Engineering Summary

Calculate Surface-Mount Resistor Pulse Power Derating Advisor

Frequently Asked Questions

What does this calculator calculate?

The Surface-Mount Resistor Pulse Power Derating Advisor Calculator estimates Derated Pulse Power Limit based on the input parameters you provide

Why is rated continuous power important in this calculation?

rated continuous power is directly proportional to derated pulse power limit. When you enter rated continuous power in W, the calculator uses it in the engineering formula to compute the output

How should I interpret the result derated pulse power limit?

The calculator outputs derated pulse power limit in W. For larger power values, divide by 1000 to express the result in kW, or by 745.7 for horsepower. The result is computed directly from the input values using the defined engineering formula

What units should I use for the inputs?

Enter each value in the units shown next to the input field: Rated Continuous Power (W), Junction-to-Case Thermal Resistance (K/W), Junction-to-Case Thermal Capacitance (J/K), Pulse Duration (s). Make sure all inputs use the specified units for consistent results

What assumptions does this calculator use?

This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment

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