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Post Info TOPIC: schottky diode only 2 connecting pins
jeepnudger


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schottky diode only 2 connecting pins
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How do I work out which pin is anode as there is no marking and does cathode become the connection to the solar panel and other lead goes solar controller? These diodes I bought from jaycar are flat 2pinsand with metal back plate I presume to dissapate any heat.



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dabbler


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No markings at all ? Commonly a stripe at one end indicates the cathode or negative. The Jaycar website should have details and specs sheets. The Jaycar part number (on your receipt) might help others too. All else fails, ring Jaycar.

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kgarnett


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I assume it is a MBR735 diode (jaycar P/N ZR1029)

Here is the data sheet for that device which shows which pins are anode cathode etc.

Hope this helps.

 

Ken

 

PS. Those diodes are rated at 7.5A maximum so if you are using with a 120W panel, you may be running close to the maximum of the device. 

May be better to use a diode with a higher current rating.



-- Edited by kgarnett on Tuesday 8th of December 2020 10:10:36 AM

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MBR735-D (1).pdf (126.5 kb)
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DeBe


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Note that the metal tab is internaly conected to one of the pins. It will need substantial heat sink if you want to pass 7A through it. & will need insulation betwan the tab & the heat sink. I have used similar diodes (40A ones) on solar panels & used the panel frame as the heatsink. The 40A Shotkey diodes were salvaged from old computer power supplys from a scrap yard for free.

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D.L.Bishop
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