Selection guides, cross-reference reviews and engineering Q&A for LAN transformers, RJ45, SFP and other communication components, plus the latest from VOOHU.
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
Can an audio isolation transformer sit on a 48 V phantom-powered mic line? In series it blocks phantom and silences condenser mics; at a preamp input the windin
What is the difference between 3U, 6U and 50U gold plating on RJ45 contacts? Plating thickness sets mating durability and corrosion resistance, not bandwidth. U
A full comparison of the 23 chip LAN order codes VOOHU offers across six sizes. 2012 and 3216 are Cap+CMC and contain no transformer at all; only 3532A, 4532B,
A parameter-by-parameter comparison of the 20 JLSemi Ethernet switch ICs distributed by VOOHU: what the “+N” uplink in 5+2 and 8+2 actually is, the three things
ESD testing passes but the gigabit link goes unstable once protection is fitted? This guide sets the selection order by capacitance, voltage grade and structure
A practical four-layer check for SFP presence, 3.3 V power, I²C management and board-side connector contact.
A practical WHPT-EE050-009 troubleshooting guide covering continuity, DCR and loaded-waveform checks for missing signals and nuisance trips.
Compare five WHACM15A60R power-line common-mode chokes by 100 MHz impedance, current rating, and DCR to build a practical shortlist.
Compare WHDG18110G and WHDG18101G insertion-loss limits, centre taps, pin mapping and board-level checks before approving an 18-pin Gigabit LAN transformer repl
Practical selection, installation and maintenance guidance for dust plugs used on spare RJ45 ports, including two VOOHU product options and the boundary between
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