Path: csiph.com!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: "ChrisND@privacy.net" Newsgroups: sci.electronics.components Subject: Re: ETD51 (-030) darlington transistor TO-220 case Date: Wed, 27 Apr 2022 12:53:16 +0100 Lines: 25 Message-ID: References: <9dcdc9eb-7a34-631b-0ebb-c2bdca7043e6@electrooptical.net> <3ba0b770-3cda-4b6f-b743-c758ae21f70an@googlegroups.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: individual.net S7v7G3g2cTi9KIgq4yZKbgxiLMOvqJiz9ikoOQ8Mz/SVlE12mv Cancel-Lock: sha1:7GO8+ZXa2mYWrTC4qXg+W+aGXVU= User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Content-Language: en-GB In-Reply-To: <3ba0b770-3cda-4b6f-b743-c758ae21f70an@googlegroups.com> Xref: csiph.com sci.electronics.components:6488 On 26/04/2022 19:42, Three Jeeps wrote: > On Tuesday, April 26, 2022 at 11:55:27 AM UTC-4, chr...@privacy.net wrote: >> On 26/04/2022 16:26, Phil Hobbs wrote: >>> Chr...@privacy.net wrote: >>>> Hi, can anyone point me in the direction of a data sheet for this >>>> device please? Failing that, even some basic data would be useful! >>>> >> Ok, thanks for the guidance. For the record, a BU941ZT was suggested as >> an alternative (its a motorcycle TCI box) - but I am not sure on what >> basis. Either way, the latter doesn't work whereas the former did - to >> some extent :-/ >> > Is what you posted ETD51 the correct p/n? I don't understand the suffix (-030). All combinations of the p/n string turn up empty (house number?) > My cross ref catalogs the most recent is 2010, provides no crosses either. > What does it do in the ckt? ETD51 I think is the generic type whereas ETD51-030 was from a specific vendor (I think!). It is used as a driver for the primary of the HT coil for the spark plug. I have a datasheet for the BU941ZT which declares it to be an NPN darlington - I just want to check the ETD51-030 has similar characteristics and, above all, has the same pinout. Chris