IRF9520 vs IRF9520N - Page 1
Forum section: electronics / projects

author: coppercone2
author_rank: Super Contributor
timestamp: October 17, 2024, 08:12:55 pm
content: Is there a difference between these two parts? I can't get to the bottom of itboth 175C rated? I thought it was for temperature

author: AndersJ
author_rank: Frequent Contributor
timestamp: October 17, 2024, 09:06:18 pm
content: i asked ChatGPT: What is the difference between IRF9520 and IRF9520N?ChatGPT responded:The IRF9520 and IRF9520N are both P-channel MOSFETs, but they differ primarily in the technology used for their design, affecting their electrical performance. Here's a breakdown of the key differences:Technology:IRF9520: This is a traditional MOSFET, built with older technology. It is commonly used for standard switching applications.IRF9520N: The "N" suffix indicates that it belongs to the newer series of MOSFETs with improved specifications, often referred to as a more optimized or "next-generation" version.RDS(on) (On-State Resistance):The IRF9520N typically has a lower RDS(on) compared to the IRF9520. This means it will have better efficiency, generating less heat and having lower conduction losses when turned on.Gate Charge:The IRF9520N may have a slightly lower gate charge, which means it can switch faster and more efficiently, reducing switching losses in applications that require high-speed switching.Performance Enhancements:The IRF9520N is designed with newer semiconductor processes, leading to enhancements in power efficiency, thermal performance, and switching speed. This makes it a preferred choice in applications that demand higher performance.Packaging and Pinout:Both MOSFETs generally come in the same TO-220 package and have identical pinouts, so they are often interchangeable in many circuits if the specifications allow.In summary, the IRF9520N is a refined version of the IRF9520, with improvements in efficiency, switching speed, and lower power loss due to its reduced RDS(on) and possibly lower gate charge.

author: thm_w
author_rank: Super Contributor
timestamp: October 17, 2024, 09:12:32 pm
content: https://www.vishay.com/docs/91074/91074.pdfhttps://www.infineon.com/dgdl/Infineon-IRF9520N-DataSheet-v01_01-EN.pdf?fileId=5546d462533600a401535611ac381dbd

author: coppercone2
author_rank: Super Contributor
timestamp: October 17, 2024, 09:17:17 pm
content: thats all wrong,The total gate charge is lower for the "old version". 18 vs 27. That is 30% lower for the NON N version.Rise time for non N version:29nsRise time for N version:47nsIt has slightly lower capacitance, its right about that. I guess the resistance is slightly lower. But for a 62% slower rise time....to me it seems like it hardly matters unless its just too fast?

author: moffy
author_rank: Super Contributor
timestamp: October 17, 2024, 09:36:45 pm
content: It does look like a technology change, the 'N' being the newer. Looking at the single event avalanche rating the 'N' is 140mJ and the 'non N' is 370mJ, I would guess the 'non N' is the more robust part.

author: CaptDon
author_rank: Super Contributor
timestamp: October 17, 2024, 09:47:43 pm
content: Never saw 'N' equal 'Newer'. That would usually be indicated by a suffix a.b.c...etc. 'N' could be a lead specification or just one particular manufacterers way of saying "This one is different from the JEDEC registered parameters". Buyer beware, like TIP41 vs. TIP41C in hi speed switch circuits. The non-C tends to blow up quickly.

author: moffy
author_rank: Super Contributor
timestamp: October 17, 2024, 09:53:36 pm
content: Quote from: CaptDon on October 17, 2024, 09:47:43 pmThe first thing it says on the 'N' datasheet is "Advanced Process Technology":https://www.irf.com/product-info/datasheets/data/irf9520ns.pdf

author: coppercone2
author_rank: Super Contributor
timestamp: October 17, 2024, 09:55:15 pm
content: it looks like downgraded and maybe optimized for slower switching speed supplies?the tip 41c one looks at least somewhat obvious, since it has a 150% higher voltage rating40 vs 100V, with the same current rating, that to me is at least a good bet that its a stronger part. but with these 9520's im not sure... its kind of hair splittingI am suspicious of "advanced process technology " . That might just mean they got a machine that makes it cheaper. Sales blurbalmost all i see about manufacturing process improvements means its cheaper for the company, that one never has anything to do with the specification parameters lol. you can put a work light on it and claim it improved the manufacturing processreplacing a hermetic ceramic dip package with a injection molded plastic = advanced improvement

author: gdr771
author_rank: Contributor
timestamp: October 17, 2024, 10:28:43 pm
content: Quote from: AndersJ on October 17, 2024, 09:06:18 pmI assume that was for comedy purposes. The datasheets clearly show they are different parts in several ways, with the 'N' variant slower, lower on-resistance, and older.

author: gdr771
author_rank: Contributor
timestamp: October 17, 2024, 10:37:06 pm
content: Quote from: coppercone2 on October 17, 2024, 09:17:17 pmLower resistance typically comes at the price of higher gate capacitance.Quote from: coppercone2 on October 17, 2024, 09:17:17 pmIt depends. For switching applications the total heat is from time spent in the transition zone while switching plus the steady-state at minimum resistance. So if you're switching at high frequencies then maybe you want speed. On the other hand maybe you want lower EMI and a slower switching speed, and maybe you're slowing down the switching speed with some series R on the gate anyway. If you're switching at a very low frequency then maybe the lower steady-state voltage drop or lower heat dissipation matters to you.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: October 17, 2024, 11:38:17 pm
content: Quote from: AndersJ on October 17, 2024, 09:06:18 pmI thanked this post just so I can un-thank it.Nothing is going to have a meaningful citation; the datasheet included, which is just going to be whatever version(s) you find online.At best, check out the databooks. IRF(9)5xx are quite old heritage. You can find them on bitsavers. They might specify suffix meaning, or differentiate the parts, or you find the numbering changed from year to year (which might still not be very explanatory). There is no more direct source than this.Tim

author: Slh
author_rank: Regular Contributor
timestamp: October 18, 2024, 01:36:31 am
content: Given that both are obsolete the main difference will be which one the knock-off suppliers will have decided to copy or fake.