An MPO connector, short for Multi-fiber Push-On connector, is a compact, high-density fiber optic interface that accommodates multiple optical fibers—typically 8, 12, 16, or 24—in a single rectangular ferrule made of precision-molded thermoplastic.

It uses a spring-loaded mechanism to maintain physical contact between fibers and is available in both male (with alignment pins) and female (without pins) configurations. The connector is keyed to ensure proper polarity and orientation, and it supports both single-mode and multimode fiber types.

MPO connectors are foundational in structured cabling systems for data centers, enabling rapid deployment of trunk cables, breakout assemblies, and cassette-based patching systems.

Their ability to support parallel optics makes them essential for high-speed Ethernet standards such as 40GBASE-SR4, 100GBASE-SR10, and emerging 400G deployments, where multiple fibers are used simultaneously for transmit and receive channels.

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