1. What is a PCB Clearance Calculator?

Definition: This calculator determines the minimum required spacing between PCB traces based on the peak voltage difference between them.

Purpose: It helps electronics designers ensure proper electrical isolation and prevent arcing or short circuits between traces.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Spacing \) — Minimum required clearance (millimeters)
• \( V_{peak} \) — Peak voltage difference between traces (volts)

Explanation: The formula provides a conservative estimate for creepage and clearance requirements based on IPC standards.

3. Importance of PCB Clearance Calculation

Details: Proper spacing prevents electrical breakdown, improves reliability, and ensures compliance with safety standards.

4. Using the Calculator

Tips: Enter the peak voltage difference between adjacent traces. The result shows the recommended minimum spacing in millimeters.

5. Frequently Asked Questions (FAQ)

Q1: Is this formula applicable for all PCB materials?
A: This is a general formula for standard FR4 material. Special materials may require different calculations.

Q2: What about high-altitude applications?
A: For altitudes above 3000m, increase clearance by 10-20% due to reduced air density.

Q3: Does this account for pollution degree?
A: This is for normal indoor conditions (Pollution Degree 2). For harsh environments, additional margin is needed.

Q4: What's the minimum spacing regardless of voltage?
A: Most manufacturers recommend at least 0.2mm for manufacturability, even for very low voltages.

Q5: How does this relate to creepage requirements?
A: Creepage (along surfaces) often requires greater distances than clearance (through air). This formula gives minimum values for both.