diyAudio Forums Archive > Top > Other Stuff > Electronics and Parts Unknown SMD - Click HERE for Original Thread Netlist I found this broken SMD in a plotter board, in the regulator stage. One side carries 40VDC, the other is connected to ground. Rectifier->fuse->SMD->ground. The fuse is broken as I measure a short across both leads of the device. If you look carefully, you see a sign of a half sine wave and the letters M R. R might be B As usual, any help is appreciated. /Hugo Onra Hi, it,s a SEMITRON device (now Littlefuse). The marking code can be found at: http://clivetec.superihost.com/SMD_CodesM.htm and should be a SMB40 unidirectional transient suppressor with a voltage limit of 40V. Onra Netlist Onra, thank you very much. Page bookmarked. /Hugo :) davidsrsb These devices failsafe shorted

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