Trouble identifying component
I'm repairing a Denon DRA-375RD reciever, and have identified the
faulty part. Problem is, I'm not exactly sure *what* it is. It's in a 2-lead TO-92 package, connected in series with one of the power transformer secondaries. I'm guessing it's a resettable fuse. It's electrically open, and carefully bridging it with some resistance makes the set jump to life. Seems like the circuitry wants to pull a little over 200mA through it. The component silk-screen ID is PR401, and the only markings on the package is: N25 H Maybe the "25" means 250mA trip? Anyone have some information? Thanks in advance. |
IC Circuit protector (Fuse) ICPN25 = 1Amp. Colin
wrote in message oups.com... I'm repairing a Denon DRA-375RD reciever, and have identified the faulty part. Problem is, I'm not exactly sure *what* it is. It's in a 2-lead TO-92 package, connected in series with one of the power transformer secondaries. I'm guessing it's a resettable fuse. It's electrically open, and carefully bridging it with some resistance makes the set jump to life. Seems like the circuitry wants to pull a little over 200mA through it. The component silk-screen ID is PR401, and the only markings on the package is: N25 H Maybe the "25" means 250mA trip? Anyone have some information? Thanks in advance. |
Hi there these things are called IC protectors, sort of fuse yours is
'normal blow' 1 Amp see http://www.cricklewoodelectronics.co...me.php?cat=209 regards bob I'm repairing a Denon DRA-375RD reciever, and have identified the faulty part. Problem is, I'm not exactly sure *what* it is. It's in a 2-lead TO-92 package, connected in series with one of the power transformer secondaries. I'm guessing it's a resettable fuse. It's electrically open, and carefully bridging it with some resistance makes the set jump to life. Seems like the circuitry wants to pull a little over 200mA through it. The component silk-screen ID is PR401, and the only markings on the package is: N25 H Maybe the "25" means 250mA trip? Anyone have some information? Thanks in advance. |
So do they reset themselves, or are they just a fuse, essentially? I
can't quite tell from the datasheets. burbeck wrote: Hi there these things are called IC protectors, sort of fuse yours is 'normal blow' 1 Amp see http://www.cricklewoodelectronics.co...me.php?cat=209 regards bob I'm repairing a Denon DRA-375RD reciever, and have identified the faulty part. Problem is, I'm not exactly sure *what* it is. It's in a 2-lead TO-92 package, connected in series with one of the power transformer secondaries. I'm guessing it's a resettable fuse. It's electrically open, and carefully bridging it with some resistance makes the set jump to life. Seems like the circuitry wants to pull a little over 200mA through it. The component silk-screen ID is PR401, and the only markings on the package is: N25 H Maybe the "25" means 250mA trip? Anyone have some information? Thanks in advance. |
No reset if value is exceeded, fuse yes different faster.
I am surprised to see one used at the transformer secondary they are rated at 50V designed to protect ICs but could work well for that transformer/circuit or maybe safety critical part? Jeff |
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