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Material, explained

LC or SC?

LC or SC: which fibre connector should I order?

LC for anything plugging into a modern switch or transceiver, SC where the older equipment or the frame demands it. LC has a 1.25 millimetre ferrule against SC's 2.5, so it fits twice as many ports on the same panel, which is why the equipment moved to it. SC is larger, latches with a push and a pull, and is easier to handle in a cramped or badly lit riser.

Both are defined by IEC 61754-20 and IEC 61754-4.

Published by Data Systems, network material suppliers in Secunderabad, Hyderabad since 1984, which is forty years of experience with these parts. Last checked 2026-08-11. How we check this, and what we got wrong.

Side by side

LCSC
Ferrule1.25 mm2.5 mm
Port densityTwice as many per panelHalf as many
LatchClip, duplex pairs clip togetherPush-pull
HandlingSmall, fiddly in glovesEasy in a cramped riser
Specify it whenSwitch and transceiver portsDistribution frames, FTTH, older equipment

LC, on the shelf

What LC is

SC, on the shelf

What SC is

Other choices we get asked about

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