Use a device with equal or greater breakdown voltage, avoids the use of these universal replacement devices whenever possible we almost always have an exact replacement part in stock (and ECG, NTE, and SK replacements are usually more expensive than the original part).įollow these general rules for substitution to stay out of trouble: This is true because the ECG / NTE devices are intentionally selected to replace a group of components with the same or lesser parameters. However, this latter procedure must be used with caution because a given ECG / NTE number will replace many devices, but not all devices in the replacement list can replace each other. This simplifies locating transistors when they are needed and can suggest a replacement part when necessary. files its stock of transistors by their ECG / NTE cross numbers with both a The numbering scheme used by ECG, and later copied by NTE, had already become the accepted default long before the acquisition of ECG by NTE.ĪnaLog Services, Inc. As of January 19, 2001, NTE acquired the assets of ECG, and it seems inevitable that NTE will now dominate the replacement semiconductor marketplace. They have never even established a website, nor have they produced a recent cross reference book. TCE has done very little with the SK line since acquiring it, except for renaming it the TCE SK Series. In addition, several electronics suppliers have established house replacement lines, like TCG and EXR, but most of these were/are small incursions, tackling only the top 100 or so replacement devices. Even Radio Shack dabbles in the replacement semiconductor marketplace, but their cross reference book is thin by comparison to the major players ( offers NTE / ECG devices also). Other manufacturers had replacement lines in the past, including Motorola with their "HEP" series, General Electric with their "GE" series, Raytheon, Mallory, Sprague, and Workman. SK was started by RCA, and was more recently acquired by Thomson Consumer Electronics (TCE), who already had a replacement line. NTE is a privately held domestic corporation started in 1979. ECG offered vacuum tubes as part of their line until that market dried up. There is an advantage to having more than one cross reference as we have actually found a few mistakes over the years by checking more than one book.ĮCG was started by Sylvania in 1966, and was more recently acquired by Philips.
Transistor cross ref free#
Check out Moyer Electronics for online versions of the NTE, ECG, and SK replacement guides, as well as free downloadable versions of the software.
Transistor cross ref software#
We have seen the SK software for sale, but it is an old DOS program hardly worth the trouble.
Transistor cross ref download#
The SK software does not appear to be available for download directly from TCE SK. The ECG software is no longer available for download from ECG following the acquisition of ECG by NTE.
The NTE software can be downloaded on this NTE page. Make friends with a counter worker at your local parts house to get a free printed book (otherwise they charge a few bucks for them). Each company has traditionally published its own thick printed replacement guide or cross reference, and more recently computer software (the replacement guides and software also cross-reference each others part numbers). The universal replacement folks have always encouraged the use of their devices in new designs, but the relatively high cost of these devices has limited the practice.ĮCG and NTE use the same device numbering system, but the SK numbering system is completely different. When the Delco DTS line of power transistors were discontinued, SIE began using the ECG165 in their 300 volt downhole power supplies (the later schematics actually call for the ECG165). For example, the single most popular ECG and NTE transistor, the 123AP, replaces thousands of different OEM and industry standard ( JEDEC) part numbered transistors. The underlying concept is that each ECG, NTE, or SK numbered device can replace a group of other semiconductors. AnaLog on ECG, NTE, SK Replacement SemiconductorsĮCG / NTE / SK Replacement SemiconductorsĮCG, NTE, and SK are lines of universal replacement semiconductors.
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