TIP42 TIP42/42A/42B/42C) TIP41/41A/41B/41C O-220 TIP42 TIP42A TIP42B TIP42C TIP42BTU transistor tip41Ībstract: TIP31 NPN Transistor TO220 Semiconductor Packaging transistor cross reference Cross-Reference DATE transistor crossreference application TIP31 Tip31 Text: Silicon Transistor Absolute Maximum Ratings TC=25☌ unless otherwise noted Symbol VCBO Collector-Base, - PNP Epitaxial Silicon Transistor SEARCH | Parametric | Cross Reference space Fairchild, TIP42A Products groups PNP Epitaxial Silicon Transistor Analog and Mixed Signal Contents Discrete, New products Product selection and back to top parametric search Cross-reference Applications search, Semiconductor space Product Folder - Fairchild P/N TIP42B - PNP Epitaxial Silicon Transistor SEARCH I also bought the Tower's FET selector as well The internet is great, but I still like to browse through specifications in a book now and then.Transistor crossreference Datasheets Context Search Catalog DatasheetĪbstract: 70473180 SAC-187 Motorola 70483180 70483100 70484200 70487478 70484140 SJ-6357 70483180 For GBP12, it's a bargain so I have placed an order. I just took a look on Amazon.the Tower's International Transistor Selector is still available The latest revision seems to be December 2008 and it includes SMT transistors. Some circuits just will not behave without a very close equivalent part. This is crucial for good equivalent selection. One thing I did learn all those years ago, was to read the schematic and decide how critical the components specifications were to correct operation. SMD stuff is too modern for it though so I then have to fall back to internet searches. The internet has changed searching for equivalents but I often find the Towers book faster as I grew up with it and know many favourite equivalent transistors. It lists the transistors specifications and any equivalent (but not all) You can flick through various ranges of transistors and select a suitably specified part. I still have my copy from the 1980's and it still serves me well.
In the UK when I worked as a 'Saturday lad' in an electronics shop, I used the 'Towers Transistor selector' book. Substitution of RF power devices needs to be approached with a great deal of caution,& preferably with a Spectrum Analyser on hand. Modern devices as a rule,are better spec'd than older ones,so a common modern type may replace an old special type. In more complex circuits,have a look at what devices other manufacturers use in similar circuits-there may be a common device which will do the job. If it is something simple,like a lamp,LED,or relay driver,you can probably replace it with a more common type without any drama. If you can't find a listed equivalent,one good philosophy is to look at the circuit the device is used in. Not only did they often disagree,but by the time you had tracked from one book to another,the specs on the final one you turned up were many times quite different to the original. At one of my earlier jobs,we had semiconductor equivalents book from several sources.
Good luck finding anything that will do that!(though it must be out there somewhere) Many times the equivalents shown in the various books are harder to find than the original component.
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