Two 2SD427-R Original Toshiba Transistor TO3 hFE (DC gain) >= 40 pretest

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Seller: empire9876 ✉️ (1,375) 100%, Location: Charlotte, North Carolina, US, Ships to: US, Item: 232695099724 Two 2SD427-R Original Toshiba Transistor TO3 hFE (DC gain) >= 40 pretest. Two 2SD427-R Original Toshiba Transistor TO3 hFE (DC gain) =>40 pretest New Old stock clean Unused Some surface scratch. Some surface discoloration visible as seen in the picture. Plus free shipping to lower 48 mainland US states.

Aside from Mechanical parts the followings are my policies regarding all semiconductors:

a)I am not in parts distribution business. These parts are left over from an old business I owned which no longer operates and are sold as personal holdings.

b)The parts I am selling are either vintage components or pre-2003. With the exception of some parts which are high speed switching most devices will have to be treated or considered older products suitable for replacement in older products of suitable design.

c)Typically transistors HFE and hfe have large interval values. Gain test of most components must consider the time line when they were manufactured. See Note: 1)       The only transistor testers I accept result from are those that have been verified by transistor (semiconductor) manufacturers. 2)       The transistor testers have been recommended to authorized  service centers in the past or recently by Audio, TV, and like manufacturers. 3)       The transistor testers are fully capable of switching off (mute) base current to reduce unnecessary physical disconnect related spike at the base. 4)       I reserve the right to request a clear picture be presented of the bench setup, instrument used, and gloves and grounding of the workbench as well as isolation of bench power.

d) When you buy semiconductors from me, I assume you know everything there is about electronics parts handling, testing, and replacing with proper tools, bench and instrument applied. All semiconductors are shipped in Anti-Static bag and IC’s are in ESD foam.

e)    As you know, Semiconductors shipped do have date code plus markings. When encountering problem within the first 7days of receiving item you have to notify the issue.

f) There are no defective parts I sell. None of the parts I sell are pulled parts since I am not semiconductor dentist. It is possible I may ship wrong part sometimes and I need to know immediately about the deficiency so I can expedite the remedy.

g) All parts are sold As Is . That does not mean there is no room for some diplomacy . When unhappy use “contact seller eBay Link” and let me know the problem.

h) Matched components imply that the devices are complementary or same Gain Group of devices often marked by a letters A,B,C,R,Y  etc. It does not refer to HFE test result is identical of each other. Good luck in finding two devices having exactly identical HFE outcome. I have been in the industry nearly 35 years and never seen a pair with identical HFE .

i ) You buy semiconductor parts from me on understanding that I will do what I can to get the parts shipped within 24 hours (excluding weekends and holidays) and that your feedback for me is either none or Five Star .

j) I am very aggressive in my communication. If I encounter problem with your order such as shipping address, email information, instruction you provided, I expect prompt response from you. Because items have to leave my place within 24 hours or sale is cancelled and your money is refunded.

k)  Ask question before you buy including technical. I will respond to your question within less than 6 hours top (weekend and holidays excluded).

l) IC’s do have suffixes as well. Some have R or L to indicate left or right amplifier. Other Processors and control logic devices have versions. Pay extra attention to the numbers. Ask if in doubt.

Special Note* When parts are sold and inventory is zero, I am not replenishing it. I sell what I have and that is all to it. So; if you have old electronics that require older parts to match the design and parts already in place, then this is your opportunity.

Note: HFE/hfe  (gain) and operating f specification have overtime changed as device manufacturers found different method of manufacturing such as epitaxial manufacturing process. Nevertheless many other power transistors originating from this era (1970~1985) cannot be assumed to have great high-frequency performance and there can be variation of open-loop gain and other specification when compared to modern transistors. Modern successors to early transistors (1970~1980) can be much more suitable in fast-switching circuits or high-end audio power amplifiers which enabled us to design amplifiers with specification of 15Hz~40Khz compared to older amplifiers 20Hz~20KHz. Why buy old transistors then. The group of transistors that work along the defective transistor you about to replace also originated about the same period. It simplifies job!.  The reason is too long for this note.

 

  • Condition: New – Open box
  • Condition: New Old stock clean Unused
  • Brand: Toshiba
  • MPN: 2SD424-R
  • Model: 2SD427-R
  • Country/Region of Manufacture: Japan

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