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LAN Transformer

LAN Transformer

Shop LINK-PP LAN transformers (discrete Ethernet magnetics) for PHY isolation from 10/100 Base-T through Gigabit, 2.5G/5G, and 10G Base-T. This manufacturer hub covers single-, dual-, and quad-port SMD magnetics modules—PoE-capable options included—for designs that keep the RJ45 jack separate from the transformer. Browse Single Port LAN Transformer, Dual Port, or return to Integrated RJ45 when you prefer a one-piece magnetic jack. Match turns ratio, PoE class, pin count, and reel packaging on each product page before ordering.

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Frequently asked questions

01.What is a LAN transformer used for?
A LAN transformer (Ethernet magnetics module) provides galvanic isolation, common-mode filtering, and impedance matching between the Ethernet PHY and the cable plant. Discrete magnetics pair with a non-magnetic RJ45 jack when height, BOM, or layout rules keep the connector and magnetics separate. LINK-PP covers single to multi-port SMD modules; see single-port LAN transformers.
02.How do I choose 10/100 vs Gigabit vs 10G magnetics?
Select the magnetics speed grade to match your PHY and channel (10/100, 1000 Base-T, 2.5G/5G, or 10G Base-T). Use leaves such as 10/100 Base-T LAN Transformer or 10G Base-T LAN Transformer, then confirm turns ratio, CMC, and PoE current on the datasheet.
03.Can these LAN transformers support PoE / PoE+ / PoE++?
Many LINK-PP magnetics modules are specified for PoE, PoE+, or higher power classes; support varies by SKU. Check the product page for PoE current rating, isolation voltage, and recommended center-tap wiring before you finalize the power budget.
04.Are LINK-PP LAN transformers Compatible with Pulse, Halo, or Bothhand PNs?
Yes—many listings map common OEM magnetics PNs (Pulse, Halo, Bothhand, and others) to the equivalent LINK-PP P/N such as LP1102NL. Open the Compatible product page for your OEM PN, compare pinout and electricals, then order the LINK-PP part. Contact support if your PN is missing.
05.Integrated RJ45 or discrete LAN transformer—which should I pick?
Use discrete magnetics from this hub when the jack and transformer are separate on the PCB. Prefer a one-piece integrated RJ45 when you want magnetics, LEDs, and shielding in a single magjack. Mechanical height, EMI, and BOM preference usually decide.

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