VOOHU FAEs and product engineers sharing selection, cross-reference and troubleshooting know-how for communication components.
Figures come from the VOOHU selection tables and datasheets, with the date of each count.
Every article shows when it was published, and when it was materially updated.
Conclusions and key takeaways come first; details, tables and checklists follow.
Tech BlogChanging a PoE Device's Output from 12V to 5V: Can You Keep the Same Power Transformer?Changing a PoE camera or AP's isolated supply from 12V to 5V? At the same 13W, a 5V output delivers 2.4× the current of 12V, secondary copper loss rises about 4
Thinking of adding a second molded inductor in parallel to carry more current? Paralleling halves inductance and doubles total ripple, and DC current divides by
Many 1:1 audio transformers are rated 600:290 or 600:301. What goes on the secondary? Using VOOHU selection table data: why the secondary rating is the terminat
A dead Ethernet port after a surge does not necessarily mean the LAN transformer failed. How surges reach the port, a power-off method that measures each side o
Swapping a tab-up RJ45 jack for a tab-down one? Of 774 VOOHU RJ45 parts, only 85 single-port MagJacks are tab-down, and just 2 of those are SMT, both 10/100M. W
SFP module temperature alarms? Only 13 of 205 VOOHU SFP, SFP+ and SFP28 cages carry a heat sink, and all are single-row 1×N; none of the 135 stacked 2×N parts d
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