On 17/08/2018 11:49, krw@notreal.com wrote:> On Thu, 16 Aug 2018 15:36:11 +1000, Chris Jones > <lugnut808@spam.yahoo.com> wrote: > >> On 16/08/2018 12:28, krw@notreal.com wrote: >>> On Wed, 15 Aug 2018 16:03:56 +1000, Chris Jones >>> <lugnut808@spam.yahoo.com> wrote: >>> >>>> On 15/08/2018 01:27, pcdhobbs@gmail.com wrote: >>>>> Both also obsolete. :( >>>> >>>> I object to that terminology. >>>> >>>> If a manufacturer is not capable of making, or unwilling to make, or too >>>> inept to sell, something as good as they used to make, that might make >>>> the manufacturer obsolete or incompetent or irrelevant, but in my book >>>> it makes the parts become merely unavailable, not obsolete. >>> >>> Nonsense. Perhaps it's no longer *profitable* to make? >> >> As I stated, I was objecting to the terminology. I was not speculating >> on the profitability of making the parts and selling them at any >> particular price. > > Price is only tangentially related to profit. If something isn't > making a profit, it's not going to get made. That's all there is to > it. >You're repeatedly trying to argue with me about something that I didn't discuss, that being the motivation (sensible or otherwise) for discontinuing a part. I should spend my time on something else. Plonk.
PNPs with high BV_EBO
Started by ●August 8, 2018
Reply by ●August 17, 20182018-08-17
Reply by ●August 17, 20182018-08-17
Reply by ●August 17, 20182018-08-17
On Wednesday, August 8, 2018 at 7:59:30 PM UTC-4, Phil Hobbs wrote:> > The 2SD2704K is a superbeta NPN with a BV_EBO of 25V, which is great, > but there seems to be no PNP that gets anywhere close to that. I can > protect the PNPs with diodes, but that's inelegant--I'd much rather have > a PNP that can take 10V B-E. > > Any faves? > > Cheers > > Phil Hobbs > > -- > Dr Philip C D Hobbs > Principal Consultant > ElectroOptical Innovations LLC / Hobbs ElectroOptics > Optics, Electro-optics, Photonics, Analog Electronics > Briarcliff Manor NY 10510 > > http://electrooptical.net > http://hobbs-eo.comAs long as I was BJT-hunting over at Diodes, I threw in a query aimed at your requirements-- SOT-23, Vcbo 20V (min) https://www.diodes.com/assets/Datasheets/DSS5220T.pdf There are probably lots more; I just grabbed the first result that looked like a PNP lo-sat transistor. Oh, SCNR, here's another-- SOT-23, Vcbo 80V (min) https://www.diodes.com/assets/Datasheets/ds31389.pdf That's batting two for two. I'll quit while I'm ahead. Cheers, James Arthur
Reply by ●August 17, 20182018-08-17
On Friday, August 17, 2018 at 6:29:12 PM UTC-4, dagmarg...@yahoo.com wrote:> On Wednesday, August 8, 2018 at 7:59:30 PM UTC-4, Phil Hobbs wrote: > > > > > The 2SD2704K is a superbeta NPN with a BV_EBO of 25V, which is great, > > but there seems to be no PNP that gets anywhere close to that. I can > > protect the PNPs with diodes, but that's inelegant--I'd much rather have > > a PNP that can take 10V B-E. > > > > Any faves? > > > > Cheers > > > > Phil Hobbs > > > > -- > > Dr Philip C D Hobbs > > Principal Consultant > > ElectroOptical Innovations LLC / Hobbs ElectroOptics > > Optics, Electro-optics, Photonics, Analog Electronics > > Briarcliff Manor NY 10510 > > > > http://electrooptical.net > > http://hobbs-eo.com > > As long as I was BJT-hunting over at Diodes, I threw in a query aimed at > your requirements-- > > SOT-23, Vcbo 20V (min) > https://www.diodes.com/assets/Datasheets/DSS5220T.pdf > > There are probably lots more; I just grabbed the first result that > looked like a PNP lo-sat transistor. > > Oh, SCNR, here's another-- > SOT-23, Vcbo 80V (min) > https://www.diodes.com/assets/Datasheets/ds31389.pdf > > That's batting two for two. I'll quit while I'm ahead. > > Cheers, > James ArthurOops, sorry. Vebo is rotten for both--I got too excited and scanned the wrong rows. Cheers, James
Reply by ●August 18, 20182018-08-18
On Fri, 17 Aug 2018 14:53:56 +1000, Chris Jones <lugnut808@spam.yahoo.com> wrote:>On 17/08/2018 11:49, krw@notreal.com wrote: >> On Thu, 16 Aug 2018 15:36:11 +1000, Chris Jones >> <lugnut808@spam.yahoo.com> wrote: >> >>> On 16/08/2018 12:28, krw@notreal.com wrote: >>>> On Wed, 15 Aug 2018 16:03:56 +1000, Chris Jones >>>> <lugnut808@spam.yahoo.com> wrote: >>>> >>>>> On 15/08/2018 01:27, pcdhobbs@gmail.com wrote: >>>>>> Both also obsolete. :( >>>>> >>>>> I object to that terminology. >>>>> >>>>> If a manufacturer is not capable of making, or unwilling to make, or too >>>>> inept to sell, something as good as they used to make, that might make >>>>> the manufacturer obsolete or incompetent or irrelevant, but in my book >>>>> it makes the parts become merely unavailable, not obsolete. >>>> >>>> Nonsense. Perhaps it's no longer *profitable* to make? >>> >>> As I stated, I was objecting to the terminology. I was not speculating >>> on the profitability of making the parts and selling them at any >>> particular price. >> >> Price is only tangentially related to profit. If something isn't >> making a profit, it's not going to get made. That's all there is to >> it. >> >You're repeatedly trying to argue with me about something that I didn't >discuss, that being the motivation (sensible or otherwise) for >discontinuing a part.But you are discussing it. You made the asinine statement that the suppliers were, somehow, no longer capable of making these parts. My answer is *bullshit*. They have no (insufficient) incentive to make these parts. Now you claim you said nothing about profit. Whether you like it or not, engineering is all about economics.> >I should spend my time on something else.You're right. Engineering is *WAY* above your head.
