Linear Current Density Converter
Linear current density (current per unit width) describes sheet currents, busbars, and current-carrying strips. It measures how much current flows per unit of conductor width.
Common Linear Current Density Conversions
| From | To |
|---|---|
| 1 A/m | 0.01 A/cm |
| 1 A/cm | 100 A/m |
| 1 kA/m | 1,000 A/m |
| 1 mA/m | 0.001 A/m |
| 1 A/mm | 1,000 A/m |
| 10 A/cm | 1,000 A/m |
Linear Current Density Unit Definitions
- A/m (amperes/meter)
- SI unit of linear current density.
- A/cm
- 100 A/m. Common for PCB traces and busbars.
- kA/m
- 1,000 A/m. High-current busbars and rails.
- mA/m
- 0.001 A/m. Small sheet currents in antenna theory.
Frequently Asked Questions
Where is linear current density used?
Wide flat conductors, busbars, and current sheets where width matters more than thickness. Also used in antenna theory for surface currents.
How is linear current density different from volume current density?
Volume current density J (A/m²) is current per cross-section area. Linear current density K (A/m) is current per unit width in a thin sheet.
What is a safe linear current density for copper busbars?
Typically 1,000–3,000 A/m (1–3 A/mm) for continuous operation. Higher values cause excessive heating.