mousivand
Newbie level 4
I've made a device that has 20 circuits. (one of them is in attach)
![pau555mwrt1cy1gjbz22[1].jpg pau555mwrt1cy1gjbz22[1].jpg](https://www.edaboard.com/data/attachments/54/54406-1e16344db670c6bf1c01593ae36d3fe6.jpg)
The circuit in fig1 is used to switch on-off 10A DC, but when the circuit worked for 4-5 hours, some of the mosfets (2sk3569) burn.(1-2 percent of mosfets)
I use a heat sink for each 2 mosfets same as fig2.
![ws90apifng3yak6h7h6r[1].jpg ws90apifng3yak6h7h6r[1].jpg](https://www.edaboard.com/data/attachments/54/54407-1e363f149b277303ae9ae6905206641f.jpg)
Now I don't know what should I do?:bang:
I thank you in advance for your help.
Best regards:-D![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
![pau555mwrt1cy1gjbz22[1].jpg pau555mwrt1cy1gjbz22[1].jpg](https://www.edaboard.com/data/attachments/54/54406-1e16344db670c6bf1c01593ae36d3fe6.jpg)
The circuit in fig1 is used to switch on-off 10A DC, but when the circuit worked for 4-5 hours, some of the mosfets (2sk3569) burn.(1-2 percent of mosfets)
I use a heat sink for each 2 mosfets same as fig2.
![ws90apifng3yak6h7h6r[1].jpg ws90apifng3yak6h7h6r[1].jpg](https://www.edaboard.com/data/attachments/54/54407-1e363f149b277303ae9ae6905206641f.jpg)
Now I don't know what should I do?:bang:
I thank you in advance for your help.
Best regards:-D
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