MTP(F) to 4x LC OM3 10m Breakout Fiber Cable - 40G Connectivity

In this review of the StarTech OM3 breakout fiber cable, the bottom line is simple: it is built for data centers and network engineers who need to convert a single 40 Gbps QSFP+ link into four 10 Gbps LC SFP+ links with reliable, tested performance. The reviewer found the 10m MTP(F)/PC to 4x LC/PC duplex design to be a practical choice for high-density racks, with plenum-rated construction and low insertion loss that make it appropriate for both in-wall installations and equipment interconnects.

Key Features

• 40 Gbps breakout: Lets you fan out a single QSFP+ 40GBase-SR4 connection into four independent 10G LC SFP+ links for flexible port usage.
• OM3 multimode performance: Supports VCSEL operation at 850nm or 1300nm and a modal bandwidth that suits short-range high-speed links in server rooms.
• Plenum-rated jacket: The OFNP jacket permits in-wall and ceiling installations where low-smoke, low-fume materials are required for safety compliance.
• Low insertion loss connectors: MTP/MPO and LC connectors use PC polished ends and are individually tested, with test reports included to verify signal integrity.
• Push-pull MTP tabs: Flexible push-pull extensions allow single-handed installation and removal, improving accessibility in dense panels.
• Slim uniboot LC design: The compact LC duplex boots reduce cable bulk and simplify routing in crowded cable runs.

Who It's For

This cable is aimed at network administrators, datacenter technicians, and systems integrators who need to convert a 40G QSFP+ connection into four 10G SFP+ links without sacrificing signal integrity. Its plenum rating and tested insertion loss make it a sensible choice for organized, code-compliant installations in corporate or hosted facilities.

It is less relevant for home users or applications that do not require 40 Gbps aggregation or plenum-rated cabling; single-run LC patch cables or cheaper non-plenum jumpers would be more appropriate where fire rating and breakout density are not needed.

Pros & Cons

Pros

• High-density breakout supports conversion from one 40 Gbps port to four 10 Gbps ports for flexible equipment use.
• Plenum-rated OFNP jacket suitable for in-wall and ceiling runs where CMP rating is required.
• Individually tested cables with test reports included provide confidence in insertion loss and return loss performance.
• Push-pull MTP tabs and slim LC uniboot improve installation speed and cable management in racks.

Cons

• Designed specifically for OM3 multimode environments, so it is not suitable for long-reach single-mode links.
• Fixed 10m length may not match every rack layout and could require additional management or spare length.

Specifications

Length	10m (33ft)
Fiber type	OM3 multimode (50/125 m core/cladding)
Connector	MTP(F)/PC to 4x duplex LC/PC
Bandwidth / Wavelength	850nm or 1300nm VCSEL; 2000 MHz km at 850nm
Data rate	40 Gbps breakout to four 10 Gbps links
Cable OD	3.0mm (MTP), 2.0mm (LC)
Insertion loss	<0.5 dB (MTP), <0.2 dB (LC)

Our Verdict

The StarTech 10m MTP to 4x LC OM3 breakout cable is a practical, reliable option for data centers and network rooms that need to split a 40G QSFP+ port into multiple 10G SFP+ links while maintaining tested signal integrity and meeting plenum installation requirements. It represents good value for environments that require certified loss figures and tidy cable management.

Frequently Asked Questions

Can this cable connect a 40GBase-SR4 QSFP+ to four SFP+ modules?
Yes. It is specifically designed to fan out a 40GBase-SR4 QSFP+ transceiver to four LC SFP+ transceivers at 10 Gbps each.

Is the cable safe for in-wall or ceiling installation?
Yes. The cable uses an OFNP plenum-rated jacket suitable for plenum and in-wall installations where CMP fire rating is required.

Will this work for long-distance single-mode links?
No. This is an OM3 multimode breakout cable intended for short-range VCSEL multimode applications, not long-reach single-mode runs.