hello all
just a quick one. are 1n4000 series diodes and 1n493x series interchangeable? i have read datasheets and find minor differences.
just a quick one. are 1n4000 series diodes and 1n493x series interchangeable? i have read datasheets and find minor differences.
What do mean by 1n493x. Those sound like a range of zener diodes to me, whereas the 1N4000 series are 1 amp rectifiers.
They are fast rectifiers, the primary difference is the highest PIV is 600V for the 1N4937 vs 1kV for the 1N4007.
These are suitable for use in relatively low frequency switching supplies and the like.
In general the comparable UF400x are more commonly available and come in ratings of up to 1kV.
I don't see any particular advantage for the 1N493x over other more common types. Let price, availability and required PIV drive the selection you make - all will work within their intended design parameters.
These are suitable for use in relatively low frequency switching supplies and the like.
In general the comparable UF400x are more commonly available and come in ratings of up to 1kV.
I don't see any particular advantage for the 1N493x over other more common types. Let price, availability and required PIV drive the selection you make - all will work within their intended design parameters.
OK 🙂
Those are fast recovery diodes and so not directly interchangeable with the 1N4000 series in all applications, specifically if they are used in switching type supplies or anywhere where the high speed and soft recovery is a necessary feature.
If they are just used with a normal mains transformer for standard rectifier duty then they are OK to swap.
Those are fast recovery diodes and so not directly interchangeable with the 1N4000 series in all applications, specifically if they are used in switching type supplies or anywhere where the high speed and soft recovery is a necessary feature.
If they are just used with a normal mains transformer for standard rectifier duty then they are OK to swap.
thanks for your replies. i asked because there is a class h amplifier that i want to build and all the diodes in the h-step are 1n4937. in this case interchange is not possible, right?
Hard to say for that application because a lot would depend on how fast the auxiliary rails appeared and disappeared. I suspect the ordinary type would work OK although in absolute terms the high speed device may give a more glitch free changeover if looked at closely.
I have some experience designing class G and class H amplifiers, I would use the specified devices in this instance to avoid spending time troubleshooting an issue that might be easily avoided by using the specified part. (It might not even matter, but you won't know that until you have wasted a lot of time tracking down a problem.)
H class amplifiers in general require 200ns rectifiers, the 35ns (Ultrafast) are better and schottkys are better still. You can get away with old and slow 1N400x, 540x, etc. for subwoofer duty AND where emitter follower outputs are used. For full range, high freq, or where the output stage has voltage gain, use the fast ones. Distortion (commutation noise) and heat per cycle rise with the slower diodes.
thanks for your feedback. i found the same amp circuit, bigger this time than the one i have. the h-step in this case uses fr107 and fr607. i have checked the data sheets and they seem to have similar specs as 1n493x series. can use these instead?
Maybe, but I guess you have to order them in any case, so just order the ones the circuit asks for and you have one less unknown variable in your project 🙂
Why are your commutation diodes so low current? Does your circuit use individual diodes for each transistor pair? More typical implementations use a single 15 or 30 amp diode for the whole output bank. I've always been a little leery of implementations with individual diodes - nothing guarantees that all the paralleled outputs in the upper bank come on at the same time. To make these work properly you have to be diligent about matching components. Diodes and transistors. Or is it a relatively low power (100 watt-ish) design where a single 1A or 6A diode is enough?
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