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Ajutor , identificare dioda smd


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Cand spuneti ROZ cred ca va referiti la culoarea capsulei SOD-80(Glass-Mini-Melf ) Dunga galbena intradevar indica o dioda ZENER iar litera "A" indica valoarea minima stabilizata.Presupunand ca un Zener de 3,3V stabilizeaza in plaja 3,16-3,32V ,"A" indica valoarea de 3,16v. Trist este ca valoarea tensiunii stabilizate este trecuta pe rola comercializata ce contine un nr.n de diode zener. Asadar in lipsa schemei sunteti nevoit sa aflati valoarea diodei analizand circuitul in care este montata.

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Aceasta dioda se foloseste in bucla de reactie a unei surse in comutatie (ea este inseriata cu un optocuplor-fototransistor CNY 17G-3 ,acest circuit este alimentat din secundarul sursei la 10V -am pus o dioda zener de 9v1 si a mers dar tensiunile sunt un pic diferite in loc de 5V are 5,1; 10V are 10,2 iar in loc de 24 are 26,9 V). Aceasta circuit se gaseste in unitate de control (CU301) care comanda pompa de la hidrofor.

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