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I'm trying to figure out the designation of a diode, visible numbers are 3 and below it 04.

The very top image is the picture of the whole contraption (transfer relay delay switch made by Intellitec) and the circuit I'm working on is that little board to the bottom right of the picture of the whole unit. I might add that is it 50 amp unit.

enter image description here

The pictures below show the diode in question. The other one above that is a duplicate of the board that I'm working on, and the items that went bad on this board was that diode D2 in the picture and a 200 ohm resistor R4.

the resistor burnt.

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I'm working on a transfer relay delay switch that would change an RV from shore power to the generator by intellitec and the sub board that I'm working on I think changes AC in the DC.

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  • \$\begingroup\$ You also need to provide the numbers that are there but are not visible to identify it. \$\endgroup\$ Commented yesterday
  • \$\begingroup\$ They are the only numbers that I can see, there is nothing else printed on the diode, with those numbers make any sense at all could it be a one in 4003? There are three other diodes in the circuitand a 200 ohm resistor that burnt out in the circuit \$\endgroup\$ Commented yesterday
  • \$\begingroup\$ I also tried contacting intellitec tech support, and the guy there would not give me the value of the diode as he said the data sheet is not available to the public \$\endgroup\$ Commented yesterday
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    \$\begingroup\$ I would say 1n4004. \$\endgroup\$ Commented yesterday
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    \$\begingroup\$ 1N400X Datasheet here see page 5. About 0.2 inch long and just under 0.1 inch diameter. \$\endgroup\$ Commented yesterday

1 Answer 1

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It is very likely that it is a general purpose rectifier diode, like 1N4004. There is four of them nearby, connected in a full rectifier bridge circuit.

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