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Title: 1N5408 diodes Post by: W3GMS on February 02, 2017, 01:28:36 PM I was surprised when I was looking to replace my stash of 1N5408 diodes that they appear to be going end of life by some manufactures. Mouser did have some, but it looks like when they are gone that's it. A lot of ones from China are available through Ebay, but I question the quality.
The problem may be a RoHS issue. The certification said "compliant through exemption". The ones I got were manufactured by Diode Incorporated. Joe-GMS Title: Re: 1N5408 diodes Post by: KD6VXI on February 02, 2017, 02:55:23 PM They are pretty outdated by 10A10 diodes now.
I switched to 6A10 over a decade ago. Now it's more 10A10 as available. --Shane KD6VXI Title: Re: 1N5408 diodes Post by: W3GMS on February 02, 2017, 11:42:44 PM Hi Shane,
I never even heard of the 10A10 diode! Guess I better get back in the business ;). For just normal HV supplies the 5408's have always worked well. Prior to using those, I used a lot of the 1N4000 series. But I like the 3A rating of the 5400 series. Obviously they are not fast recovery rectifiers, but for line stuff, they work well. What are the advantages of the 10A10 diodes for 60 Hz rectifiers? 73, Joe-GMS Title: Re: 1N5408 diodes Post by: KD6VXI on February 03, 2017, 02:57:35 PM Joe, AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
10 amps CCS forward current and 400 amps surge. If you get a flash over, these newer rectumfriers take the surgery a lot better. Also, less damage if you negate a step start. http://www.rectron.com/data_sheets/10a05-10a10.pdf That will getcha a datasheet. I believe these also have thicker leads on them.than the older diodes. Since the lead is the heat sink in almost all our typical applications and these offer more surface area they run cooler as well. I attached a dataset first page. --Shane KD6VXI |