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12 votes

How can tiny MOSFETs be rated for relatively high current?

Clearly some impractical conditions are being imposed, nicely described by Tim Williams. Here is an approach to estimating a more practical limit. They provide the Junction-to-Ambient thermal ...
rpm2718's user avatar
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26 votes

How can tiny MOSFETs be rated for relatively high current?

This is more of a "fusing" question, so I'll give a "fusing" answer: Fusing current is quite high for short durations. A 1mm copper wire (about 18 AWG) claims 83A for 10s, 250A ...
Tim Williams's user avatar
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9 votes

How can tiny MOSFETs be rated for relatively high current?

They're being kind of dishonest. A bit, anyway. That 343A figure in Absolute Maximum Ratings is stated as 'Silicon Limited'. Look at the fine print in Note 1: From the data sheet. Got to watch out ...
hacktastical's user avatar
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6 votes

How can tiny MOSFETs be rated for relatively high current?

Package limit is 195A, and that is with the case held to 25°C, a practical impossibility in most situations. The lead length is short and we don't know what they are assuming for the termination of ...
Spehro Pefhany's user avatar
2 votes

What is the most electricity that can be transmitted over a typical power line of the US electricity grid?

Simple: as much as it's designed for. Extant examples can be pointed to, but they're just that, examples; they aren't at all fundamental design limits, nor of technology, material or physics. These ...
Tim Williams's user avatar
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0 votes

DC current gain of transistor

The formula \$I_C = \beta I_B\$ is correct, but you are also correct when you say the the two currents \$I_B\$ and \$I_C\$ do combine, by Kirchhoff's Current Law (KCL) to form current \$I_E\$ that ...
Simon Fitch's user avatar
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2 votes

Tools to measure amperage load on a curcuit in a finished setting

You can use a clamp-on meter without needing to get to the wires. You need something called a line splitter. It plugs into an outlet, then you plug your load into it. It separates the conductors so ...
GodJihyo's user avatar
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2 votes

Tools to measure amperage load on a curcuit in a finished setting

An inline meter (like a kill-a-watt) can tell you what your equipment is drawing but if you want to see what the other equipment on the circuit is drawing, you'll probably need a clamp-on meter at the ...
vir's user avatar
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