1. What is a Heat Sink Calculator?

Definition: This calculator estimates the temperature rise of a heat sink based on heat dissipation and thermal resistance.

Purpose: It helps engineers and electronics designers determine the thermal performance of heat sinks in cooling applications.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \Delta T \) — Temperature rise (Kelvin)
• \( Q \) — Heat dissipation (Watts)
• \( \theta \) — Thermal resistance (Kelvin/Watt)

Explanation: The heat dissipation is multiplied by the thermal resistance to calculate the expected temperature rise above ambient.

3. Importance of Heat Sink Calculation

Details: Proper thermal management ensures electronic components operate within safe temperature limits, improving reliability and lifespan.

4. Using the Calculator

Tips: Enter the heat dissipation in watts and thermal resistance in K/W (default 0.5 K/W). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is thermal resistance?
A: Thermal resistance measures how much a heat sink resists heat flow, with lower values indicating better cooling performance.

Q2: What's a typical thermal resistance value?
A: Common values range from 0.1 K/W for high-performance heat sinks to 5 K/W for simple passive coolers.

Q3: How do I find the heat dissipation value?
A: Check component specifications or measure power consumption (heat ≈ power for most electronics).

Q4: Does this include ambient temperature?
A: No, this calculates temperature rise above ambient. Add ambient temperature to get absolute temperature.

Q5: What if my heat sink has forced air cooling?
A: Use the thermal resistance value specified for your airflow conditions (often lower than passive values).