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Monoprice 111875 10GB Fiber Optic Cable LC/SC 20 Meter — main product image
Monoprice 111875 10GB Fiber Optic Cable LC/SC 20 Meter
Monoprice 111875 10GB Fiber Optic Cable LC/SC 20 Meter
Monoprice 111875 10GB Fiber Optic Cable LC/SC 20 Meter
Monoprice

Monoprice 111875 10GB Fiber Optic Cable LC/SC 20 Meter

OM3 50/125 multi-mode fiber delivers certified 10GbE throughput across 20 meters with LC-to-SC flexibility for mixed-switch environments.

$10.98*
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The Monoprice 111875 is a 20-meter duplex fiber optic patch cable built on OM3-grade 50/125 multi-mode fiber, terminated with a dual LC connector on one end and a dual SC connector on the other. OM3 is a laser-optimized fiber specification rated for 10GBASE-SR operation at up to 300 meters using 850nm VCSEL transceivers — the physics of this cable at 20 meters mean attenuation is essentially zero as a practical concern. The 50 μm core is the modern standard for 10GbE infrastructure; the older 62.5 μm OM1/OM2 core cannot reliably support 10GBASE-SR at all distances and is incompatible with this cable's transceivers. The aqua jacket follows TIA-568 color-coding for OM3, keeping cable plant documentation consistent.

This cable targets network engineers and IT administrators managing environments where 10GbE switches or servers have mixed LC and SC port populations — a real-world scenario in facilities that have upgraded some equipment but retain legacy SC-port switches or media converters. Rather than running LC/LC with an inline SC adapter (adding one more insertion-loss point), the 111875 creates a direct, clean single-cable path between the two interface types. It is equally suitable for structured cabling in data centers, IDF closets, or lab environments where a 20-meter horizontal run bridges a rack row or connects adjacent equipment rooms. At Monoprice pricing, the cost-per-meter for a factory-polished OM3 duplex cable with two different connector types represents strong value for a commodity infrastructure component.

Key Features

Multi-mode cable with a 50 μm core and 125 μm cladding diameter

Cable has a color-coded dual LC connector on one end and a dual SC connector on the other end

Ideal for use in 10 gigabit Ethernet (GbE) networks

Specifications

Connector Type
LC (one end) / SC (other end), duplex
Fiber Type
Multi-mode, duplex
Fiber Specification
OM3 50/125 μm
Core Diameter
50 μm
Cladding Diameter
125 μm
Length
20 meters
Jacket Color
Aqua
Supported Standard
10 Gigabit Ethernet (10GBASE-SR)

Pros & Cons

👍 Pros

  • OM3 50/125 fiber supports 10GBASE-SR at distances up to 300 meters — the 20-meter length operates with enormous margin, making link failure from attenuation essentially a non-issue in this run.
  • Duplex construction handles full TX/RX in a single routed cable, eliminating the need to manage two separate simplex fibers.
  • LC/SC connector combination directly addresses mixed-infrastructure environments where one switch has LC ports and another has legacy SC ports, removing the insertion-loss penalty of an adapter.
  • The aqua jacket color follows TIA-568 color coding for OM3 fiber, making cable identification and documentation straightforward in structured cabling environments.

👎 Cons

  • This cable is not backward-compatible with OM1/OM2 62.5/125 transceivers — deploying it in a legacy environment without verifying transceiver core size first risks an unusable link.
  • LC and SC connectors are not keyed identically — polarity (which fiber is TX, which is RX) must be confirmed against the switch's transceiver documentation; reversing polarity on both ends simultaneously is the correct fix if the link does not come up.
  • 20 meters is a fixed length; installations requiring 25 or 30 meter runs will need a different SKU, as no field-trimming of factory-polished connectors is advisable without specialized equipment.
  • Multi-mode fiber cannot support long-haul runs — if this infrastructure ever needs to extend beyond 300 meters, OM3 must be replaced with single-mode, requiring new transceivers as well.

Frequently Asked Questions

OM3 designates an aqua-jacketed multi-mode fiber with a 50 μm core and 125 μm cladding, laser-optimized for 850nm VCSELs. At this specification, OM3 supports 10 Gigabit Ethernet (10GBASE-SR) up to 300 meters — this 20-meter run is well within that envelope, leaving substantial headroom for additional attenuation from patch panels or connectors without signal degradation.
When one end of the link terminates at an SC-port device — commonly older switches, media converters, or SFP modules with SC receptacles — and the other at a newer LC-port transceiver. This cable eliminates the need for an LC/LC patch plus an LC-to-SC adapter, which would introduce an additional insertion-loss point.
No. OM3 50/125 fiber has a smaller core than OM1/OM2 62.5/125 fiber. Connecting to a 62.5 μm-optimized transceiver produces a significant mode mismatch, resulting in high insertion loss and unreliable link performance. Use this cable only with 50/125-compatible SFP modules.
Yes. Duplex fiber bundles two fibers in one jacket — one fiber carries the transmit signal, the other the receive. The dual LC and dual SC connectors at each end correspond to this TX/RX pair, so a single cable run handles full-duplex 10GbE operation.
At OM3 specification, 10GBASE-SR supports up to 300 meters. At 20 meters, this cable operates at approximately 7% of its rated distance ceiling, which means connector and patch panel losses have negligible impact on link integrity.

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