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Echivalent tranzistor


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La un amplificator Pioneer am cate 4 finali pe canal - 2 buc. 2sb541 si - 2 buc. 2sd388 , celalalt canal e ok.Din acesti 4 finali am arsi un sb541 si un sd388.Pot inlocui doar acestia 2 arsi sau trebuie toti 4 schimbati , si ceva echivalenti daca se poate care sa i gasesc usor.Deasemenea si 2 prefinali din cei 4 sunt arsi un b536 si un d381Am doar prefinali dintr-o alta statie Yamaha , si va intreb daca sunt ok. A968 si C2238. Va multumesc.

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Comparati singur citind urmatoarele datasheeturi:

http://alltransistors.com/pdfview.php?d ... iconductor

http://alltransistors.com/pdfview.php?d ... iconductor

http://alltransistors.com/pdfview.php?d ... iconductor

http://alltransistors.com/pdfview.php?d ... iconductor

http://alltransistors.com/pdfview.php?d ... f&dire=_no

http://alltransistors.com/pdfview.php?d ... f&dire=_no

Acum, cunoscand datele tranzistorilor, nu ramane decat sa cautati in catalog un echivalent sau un superior. De exemplu, puteti incerca sa montati in loc de 2SD388 si 2SB541 o pereche MJ15003 si MJ15004 (chiar daca au fT mai mica ceilalti parametrii principali sunt superiori), dupa ce in prealabil i-ati "imperecheat" sa aibe hFE apropiat si mai ales atentie sa nu fie contrafacuti:

http://alltransistors.com/pdfview.php?d ... re=_onsemi

Succes!

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Legat de cei 2 prefinali ai mei difera fata de cei originaliMaximum collector current (Ic max): 1.5A fata de 3 A siTransition frequency (ft): 100MHz in loc de 40 MHz Am inteles acum, dar care ar fi cei mai importanti parametri de care se tine cont la echivalente ale tranzistorilor. Tensiunea Ucb, Uce , Ueb , Maximum collector power dissipation, Maximum collector current , sunt suficiente?Va multumesc.

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In principiu tensiunile limita (Vceo si Vcbo), curentul de colector maxim, putere maxima disipata, frecventa de tranzitie, hFE. Cam acestia ar fi parametrii principali dupa care se poate incerca o echivalare a tranzistoarelor bipolare de joasa frecventa.

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