IRFP044 End of Life

[vdi_nenna]

If it matters to anyone.

IRFP044NPBF Infineon / IR | Mouser

 

[Dennis Hui]

I guess it was a matter of time. The IRFP044 (not N) as used in ZV4 has
been gone a number of years.

 

[Russellc]

Worse, they show 0 in stock...

Russellc

 

[vdi_nenna]

Apparently it has good transconductance?
Low voltage, high current.
Just got a bunch for Mini-AX build.

 

[Russellc]

Looks like they expect 4,914 of them in December...

Russellc

 

[Dennis Hui]

Yeah, good transconductance. Similar to IRFP044 but with lower input capacitance. It's a lower wattage part compared to IRFP044 (120W vs 180W) but still not bad. Should be a good part for the miniA.

 

[vdi_nenna]

Yeah, already have a Mini-A with IRF044.
Never really heard an XA for more than a few minutes, so I guess I'll have to build one.

 

[pinkfloyd4ever]

What designs is it used in?

 

[vdi_nenna]

Probably any low voltage design.
It's good up to 40V.
Mini-A and Mini-AX are two.
Dennis mentioned Zen Version 4. See passdiy.com.

 

[grataku]

Is that a bad thing? As I recall these sounded rather dark.

 

[vdi_nenna]

Depends on your taste

 

[2 picoDumbs]

Is that a bad thing? As I recall these sounded rather dark.

That will depend on usage/implementation.

 

[jackinnj]

I have a few tubes of these if anyone is interested. Wifey is interested in "de-accessioning"

 

[grataku]

Depends on your taste

As I understand they have high input capacitance vs higher voltage versions and they are audibly rolled off. I rather my amp reproduced all freq and if I decide the high freq are too much I may employ other means to attenuate them.
I used them in the aleph X back in the day and I experienced that first hand.

 

[2 picoDumbs]

But they have higher transconductance, so it depends on implementation.
Roll off characteristics are entirely dependent on the design, you can easily design to achieve the qualities you want.

 

[Super_BQ]

Zen v4 !!

I know - it's massively over heatsinked. I run 2 of these in bridged monoblocs

 

[AlexRivera]

Hello Folks,

Does anybody know about a book, site, something where the component's lifecycle is documented?

I'm trying to find what was the lifecycle of the original IRFP044 and IRFP150 from International Rectifier, I asked them but nah, see what they said:

"We are sorry, we do not guarantee or specify a lifetime for any of our parts. The continued availability of the part is dependent, for instance, on market demand and so on."

Thanks in Advance!
Alex

 

[woofertester]

Hello Folks,

Does anybody know about a book, site, something where the component's lifecycle is documented?

I'm trying to find what was the lifecycle of the original IRFP044 and IRFP150 from International Rectifier, I asked them but nah, see what they said:

"We are sorry, we do not guarantee or specify a lifetime for any of our parts. The continued availability of the part is dependent, for instance, on market demand and so on."

Thanks in Advance!
Alex

What exactly are you wanting to know? When the part was introduced? Or do you want to know why/when parts are declared end-of-life?

 

[AlexRivera]

What exactly are you wanting to know? When the part was introduced? Or do you want to know why/when parts are declared end-of-life?

Ideally I want to know when were they stopped being produced so in their terms "Last Order Date".

 

[Nelson Pass]

You can still get them at Rochester Elec for about $0.60

They have about 400