Re: Maximum current for TO-220 package 75-95A, and how to connect heavy leads
On 31 May 2006 19:52:02 -0500, bob <bob@> wrote:
Many years ago, I watched Phantom test the breaking point of a
TO-220 FET leg. It was at about 150 Amps DC that it went fizz like
a fuse.
bob
Yes, I remember that test well. I was skeptical of some of the FET's IR was
bringing around with current ratings over 100 amps. The test I did was to clamp
a huge copper clamp to the tab on the TO-220 case, and another clamp out at the
very tip end of the middle (drain) lead. I then turned up the current until the
lead turned red hot and melted, and Bob remembers correctly, it was at 150 amps.
The leads of a TO-220 neck down, and if you make a connection closer to the
body where the leads are wider, you will be able to carry 100 continuous amps
safely, if your connection at that point is heavy enough to be a good heat sink.
.
Relevant Pages
- Re: Current measurement
... load the following readings were obtained with a steady 4 amps rms ... through the clamp at each frequency. ... and the inevitable air gap in a clamp structure chops off the low end response. ... readings of 50 - 60Hz current-draw when used with cheap multimeters? ...
(sci.electronics.design) - Re: Current measurement
... sine wave generator and resistive dummy load the following readings were obtained with a steady 4 amps rms through the clamp at each frequency. ... The thick laminations, probably silicon steel really cut the high end response with their eddy currents, and the inevitable air gap in a clamp structure chops off the low end response. ...
(sci.electronics.design) - Re: Maximum current for TO-220 package 75-95A, and how to connect heavy leads
... bringing around with current ratings over 100 amps. ... The test I did was to clamp ... The leads of a TO-220 neck down, and if you make a connection closer to the ... but the drain doesn't have wirebonds. ...
(sci.electronics.design) - Re: Maximum current for TO-220 package 75-95A, and how to connect heavy leads
... bringing around with current ratings over 100 amps. ... The test I did was to clamp ... The leads of a TO-220 neck down, and if you make a connection closer to the ... but the drain doesn't have wirebonds. ...
(sci.electronics.design) - Re: Hypertherm Powermax 380 problems
... I had to grind a shinny spot and clamp onto the slab myself. ... I later determined that even on nice metal - the work clamp was really a post clamp and had little contact surface to pass current. ... I can pull maybe 17 amps out of it. ... My air compressor is a Ingersol Rand 5 hp, gas engine air compressor, the ones u see with two small tanks but volume is NO PROBLEM, I have 50 feet of air hose going to two air filters. ...
(sci.engr.joining.welding) |
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