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--- circuit_protection [2024/04/26 03:35] – created river
+++ circuit_protection [2025/02/23 15:27] (current) – river
@@ Line 1: / Line 1: @@
 ====== Circuit Protection ======
-SC3326 - transistor with high Vebo (25V) - used by fluke as an avalanche diode.
+===== Transistor as avalanche diode =====
+Used in multimeters.
+SC3326 - transistor with high Vebo (25V) - used by fluke?
+Fluke 17B uses BAV199 ("Low-leakage double diode").
+Fluke 77III uses MMBT3904.
 [[https://www.lcsc.com/datasheet/lcsc_datasheet_2209051100_TOSHIBA-2SC3326-B-LF-T_C27829.pdf|2SC3326 datasheet]]
@@ Line 20: / Line 28: @@
 What is needed / useful to protect NMEA 2000 network from nearby lightning strikes, or even direct ones?
+http://ww1.microchip.com/downloads/en/DeviceDoc/EMC%20Newsletter%20Issue%205.pdf
+https://www.eevblog.com/forum/beginners/what-is-a-spark-gap-and-why-we-need-it-on-a-pcb/