Скачать или смотреть 83 Fusing Current Calculator for track fuse & Current Capacity Calculator

? What is a PCB Track Fuse & Current Capacity Calculator?

A PCB Track Fuse & Current Capacity Calculator is a tool that estimates:

The maximum current a PCB trace (track) can safely carry without excessive heating.

Whether a PCB track might act as a fuse, meaning it could intentionally or unintentionally break (burn open) under overcurrent conditions.

? What Does It Do?

1. Current Capacity (Ampacity) Calculator

Calculates the minimum trace width required to carry a specific current without overheating.

Based on IPC-2221 or IPC-2152 standards.

Inputs typically include:

Current (Amps)

Copper thickness (oz or microns)

Temperature rise (°C)

Trace length (optional)

Ambient temperature

2. Track as Fuse Calculator

Calculates how much current and time it would take for a PCB track to burn out, i.e., act as a fuse.

Useful when designing current-limiting features or protective fusing built into the PCB.

Factors include:

Cross-sectional area of the trace

Material properties (copper resistivity, melting point)

Heat dissipation

Surrounding temperature

? Why Use It?

Prevent overheating and track damage in high-current applications.

Design PCB traces to act as intentional fuses in low-cost protection circuits.

Ensure reliable operation of power electronics, LEDs, motors, etc.

?️ Tools That Provide This

KiCad Track Width Calculator (Current Capacity only)

Saturn PCB Toolkit (more advanced, includes fuse modeling)

Online PCB trace calculators (some offer fuse burnout estimation)

Custom calculations using Joule’s Law and thermal equations

Would you like a sample calculation or a reference equation for designing a track-as-fuse?