aleph and bridge rectifier

[pinial26]

hello all

i have rectifier
MUR 820G
8A/200V

http://www.onsemi.com/PowerSolutions/product.do?id=MUR820

and

HFA08TB60
hexfred 8A/600V

http://www.irf.com/product-info/datasheets/data/hfa08tb60.pdf

can i use them in bridge rectifier for an aleph 5 and for an aleph 3

for the aleph 5 i use toroidals from nuvotem 2x25v 300va in dual mono configuration

the output current of 25vac is 6A i want to use only one bridge rectifier per channel

 

[Zen Mod]

yes;

iin first case you'll have 16A/400V Graetz and in second case 16A/1200V Graetz bridge

 

[GRollins]

Inrush current at turn-on is the problem, not normal operational currents. You might want to consider something rated a bit higher in the current department.

Grey

 

[pinial26]

when i watched the hexfred's datasheet


i can see

single pulse forward current =60A
maximum repetitive forward current =24A

inrush current at turn-on is it too high for this rectifiers ?

 

[acaudio]

Hi,

try the PSU Designer .
If yo use a big tranny and big capacitor bank, 60A single pulse can be to less. With a big toroid and huge caps the first charging impulse can go up to 300A. It can be necessary to use a small value, high power resistor (~0,2Ohm/10W) in series with the rectifier to reduce the incrush current.

I hope it helps.
Best Regards, Adam