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If we take 3mA to be very safe, the voltages balance out but we have to live with the high leakage current through the load, which may be a problem for the application. In the diagram I used a leakage for 10uA for the one and about datashete for the other.

We want to use it in a V application. Sign in Already have an account?

Datasheeets & Application Notes

Hey guys, I’m a new member to this forum, so I have no idea if this topic has arisen before. We can see that D1 with the lowest leakage will have more than its rated V over it. Look at this AP-note http: 2n444 June 3, Let’s look at a typical hookup using two 2N’s in series. Share this post Link to post Share on other sites. Sign In Sign Up. Register a new account. Sign up for a new account in our community. We need to create a additional leakage path greater that the worst leakage spec in order to balance the voltages.


This will cause voltage breakdown of D1, followed by breakdown of D2.


Years ago, I read or heard of someone putting two SCR’s in series to achieve 2n4444 voltage rating. Posted June 4, Also note that we will be generating a fair amount of heat in the balancing resistors as shown on the wattmeter.

We connect it as shown in the first diagram, but find that the load turns on when we connect the power, even with no trigger applied.

Off my head, I cant just ramble out the way it works, but I’ll look through the schematics and the theory book tommorow at work and try to get you a more definitive answer. I have a project coming up where I need to hold off about volts datashdet an SCR. Power Electronics Search In. You need to be a member in order to leave a comment.

2N_PDF Datasheet Download IC-ON-LINE

Create an account or sign in to comment You need to be a member in datasheeh to leave a comment Create an account Sign up for a new account in our community. By stanyJune 3, in Power Electronics. Anyone out there with any experience in this application???


From what I have seen they use pulse transformers to trig from a lower voltage to achieve simultaneous response. Dataheet single device with this type of holdoff is really expensive, so I’m looking for an alternative solution.

Already have an account? The problem is the leakage current that may vary from 10uA at a cold datashset temperature to 2mA for a hot junction. PDF This gives you the basic idea, but there are other problem issues not mentioned here.

Posted June 6,