Which might not be an issue or maybe it is. Like I said you cannot pick the proper regulator until you know what you current requirements are. The transformer is only 200mA so talking about maximum current levels for the regulator is pointless too. But only he knows #1 if the transformer will even be enough #2 what his circuit actually is so again this thread can't go anywhere good till that information is provided.You talk about the LM350 and LM338 without looking at their datasheets?
They also reduce their maximum output current when the input to output voltage is too high.
Schematic attached for 24+Which might not be an issue or maybe it is. Like I said you cannot pick the proper regulator until you know what you current requirements are. The transformer is only 200mA so talking about maximum current levels for the regulator is pointless too. But only he knows #1 if the transformer will even be enough #2 what his circuit actually is so again this thread can't go anywhere good till that information is provided.
You talk about the LM350 and LM338 without looking at their datasheets?
They also reduce their maximum output current when the input to output voltage is too high.
The circuit does not use much current from +24V but the relays are unknown and might draw a lot.
With small relays it looks like any 24V regulator will work fine with a medium size heatsink.
With that in mind a LM317 still has the issue of dealing with 48 vdc coming into it if I replace the 7824 with it. and that is 24volts difference. We are talking chernobyl-type heat.With small relays it looks like any 24V regulator will work fine with a medium size heatsink.
So what does this all mean?The numbers for the relay do not make sense. Google never heard of it since it does not have a manufacturer's name.
"01AMP"
Is it "1 Amp"? It it the rating of the contacts or the rating for the coil? Probably for the contacts.
"015MA"
Is it 15mA or 15uA? It it the rating of the contacts or the rating for the coil? Probably 15mA is the coil's current.
Then the entire circuit draws only about 50mA from 24V when both relays are activated.
I tried that this evening with a 150ohm 10w resistor and a 33v 5w zener diode. The zener was really getting too hot for my comfort.A zener diode is a good way to convert the excessive input voltage into heat.
Simply look at the datasheet for the zener diode to see that its temperature is about 200 degrees C at its rated power which is extremely hot.
The datasheet shows its thermal resistance so you can calculate a suitable power for a reasonable temperature.
It is silly to use a power supply voltage that is too high then waste a lot of power making a lot of heat to reduce it.