1. What is PCB Voltage Clearance?

Definition: The minimum distance required between conductors on a printed circuit board (PCB) to prevent voltage breakdown or arcing.

Purpose: Ensures electrical safety and reliability by maintaining proper isolation between different voltage potentials on a PCB.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• Spacing — Minimum clearance distance (millimeters)
• \( V_{\text{peak}} \) — Peak voltage between conductors (volts)

Explanation: The formula provides a basic guideline for creepage and clearance requirements based on the peak voltage difference between conductors.

3. Importance of Voltage Clearance

Details: Proper clearance prevents electrical arcing, reduces risk of short circuits, and ensures compliance with safety standards like IPC-2221.

4. Using the Calculator

Tips: Enter the peak voltage between conductors in volts. The calculator will determine the minimum recommended spacing in millimeters.

5. Frequently Asked Questions (FAQ)

Q1: Is this formula applicable for all PCB materials?
A: This is a general guideline. Specific materials and environmental conditions may require adjustments.

Q2: What about high-altitude applications?
A: At higher altitudes, you may need to increase clearance due to reduced air density.

Q3: Does this account for pollution degree?
A: No, for polluted environments or high reliability applications, additional margin should be added.

Q4: What's the difference between clearance and creepage?
A: Clearance is the shortest air distance, while creepage is the shortest path along the surface.

Q5: When should I use more conservative values?
A: For safety-critical applications, high humidity environments, or when dealing with high-frequency signals.