PWB Etched External Copper Current Capacity
The graph above shows the amount of current an External trace on a
printed wiring board can handle. The picture provides the current rating
based on trace cross section in square mils, temperature rise and current
in amperes.
For example; if the trace width is 100 square mils, that trace can accept
between 3.5A and 10 amps depending on the acceptable temperature
rise.
Key Phrase:
How much current will a trace handle
What is the current rating of a trace
What trace width will handle a certain amount of current.
What is the Trace current rating
Internal
Trace Capacity
PWB Production Vendors {This Web Site}
| Voltage Between Conductors |
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Surface Layers | Internal Layers |
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0.005" | 0.004" |
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0.015" | 0.008" |
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0.030" | 0.010" |
MIL-PRF-38535E - Integrated Circuits (Microcircuits)
Manufacturing
MIL-PRF-31032 - Printed Circuit Board/Printed Wiring Board,
General Specification for
MIL-PRF-55110F - Printed Wiring Board, Rigid, General
Specification for
MIL-C-46058C - Insulating Compound, Electrical (For Coating
Printed Circuit Assemblies)
MIL-C-47175A(MI) - Compound, Polyurethane, for Conformal Coating
of Electronic Circuitry
MIL-C-14550B - Copper Plating, (Electro-Deposited)
MIL-I-46058C - Insulating Compound, Electrical (for Coating
Printed Circuit Assemblies)
MIL-STD-275E - Printed Wiring for Electronic Equipment
MIL-STD-2118 - Flexible and Rigid-Flex Printed Wiring for
Electronic Equipment Design Requirements for
MIL-T-10727C - Tin Plating: Electro-Deposited or Hot-Dipped, for
Ferrous and Non-ferrous Metals
RoHS - Restriction of Hazardous Substances
Graphic of Minimum
Annular Ring, What is a Minimum Annular Ring.
Graph of PWB
Ground Potential, moving away from a single point ground connection
[example].
.... Description
of Ground Loops
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