Bridge Rectifier substituting to next model up

[L__J]

Hey guys I got sent the KBJ408G instead of the KBJ406G would this be ok to substitute for the needed bridge rectifier
 
Peak Repetitive Reverse Voltage
Working Peak Reverse Voltage
DC Blocking Voltage:
KBJ406G = 400v KBJ408 = 600V

RMS Reverse Voltage:
KBJ406G = 420v KBJ408 = 560v

The rest of characteristics are the same

[digsys]

Anything up to OZ mains voltage, you will be fine. Most bridges are well over-rated in voltage. If you're not directly rectifying mains,
or at a much lower voltage, then even better. It's a very minor voltage difference.

[L__J]

Cheers I thought so..

Bloody aliexpress sending wrong parts.

[L__J]

Also this is for a TV power supply just making sure it will work.

[digsys]

Even though they will rarely ever use a bridge close to spec, to be really sure, what voltage is across it? If you're not sure, check the voltage
rating of any cap hanging off it.

[The Soulman]

The replacement has a higher maximum voltage rating than the original, never a problem.

[glarsson]

What is the problem? They sent a better product than ordered. No need to check voltages unless the wrong part was ordered initially.

[T3sl4co1l]

In theory, "better" depends on use.  Diode Vf goes up slightly as Vrrm goes up.

In practice, datasheets don't specify this; typically the 50-200V parts are specified together, and the 400-1000V parts together.  It's not clear if, by getting a 600V part instead of 800V, you're getting a slight edge on Vf, or conversely, if they're actually all the same Vf and Vrrm in that set.

If Vrrm satisfies your application, don't worry about it.

Tim

[L__J]

Thanks guys I done a bit more googling on my question, came across several people saying they use the higher rated model all the time and manufactures only use the lower one because its cheaper. 

[james_s]

That's generally true, speaking from experience you can nearly always get away with using a higher voltage rectifier. In this application it will be no problem at all.

[L__J]

Cheers guys I have the tv running again..
I have parts for another 2 tv's with this signature fault.

[digsys]

... I have parts for another 2 tv's with this signature fault.

Maybe it's an over-heating problem? Any indications that there is heat stress where it's mounted?

[6PTsocket]

Not a problem. a little better prv is an improvement with no down side. As far as forward drop is concerned, once the current is higher than a few mills, the drop is around 0.7 volts for a silicon rectifier, no matter what the voltage rating.  Industrially,saving a penny or two matters so they buy no more than they need but fol small quantity use, the difference in cost for a higher rating is negligible. I usually buy a bunch at the highest rating I might need and use it for everything. 50v prv works fine at 800 volts and has for me for the last 50 years. Ali did not screw you, they filled the order with a slightly better product.

[T3sl4co1l]

Not a problem. a little better prv is an improvement with no down side. As far as forward drop is concerned, once the current is higher than a few mills, the drop is around 0.7 volts for a silicon rectifier, no matter what the voltage rating.

FYI, Vf is closer to 1V for power rectifiers, and even more for higher voltage types, and fast-switching types.

Tim