RamboCables OM4 LC‑LC Duplex Fiber Patch Cables 40m (2‑pack) — 50/125µm MMF, LSZH, Low Insertion Loss

RamboCables 40m OM4 LC–LC duplex fiber patch cables are multimode, LSZH-jacketed cords designed for high-density 10G/40G/100G network links and data-center patching.

These two 40-meter (130 ft) OM4 multimode patch cables use 50/125µm fiber with LC connectors on both ends, delivering low insertion loss and controlled return loss for reliable short-to-medium reach optical links. Built with LSZH jackets and zirconia ferrules, the pair supports common transceivers (SFP+, QSFP+, SR variants) and is tailored to high-density racks, telecom rooms, and enterprise fiber panels.

How do these OM4 LC–LC cables improve network performance?

OM4 fiber offers higher modal bandwidth and longer reach compared with OM3 for the same connector type, making it well suited for 10G, 40G and certain 100G short-range applications. Low insertion loss and ≥30 dB return loss help maintain signal integrity through patching points.

• 4700 MHz·km modal bandwidth at 850 nm for extended reach
• Insertion loss ≤ 0.3 dB per connector for minimal attenuation
• Return loss ≥ 30 dB to reduce reflections
• Compatible with SFP+/QSFP+ and SR transceivers

What distances can I expect for 10G, 40G and 100G over OM4?

OM4 multimode fibers support considerably longer spans than lower-grade multimode cables at the same wavelength. Expect hundreds of meters for typical Ethernet multimode short-range connections, depending on transceiver types.

• 10 GbE up to approximately 400 meters at 850 nm
• 40 GbE up to approximately 350 meters at 850 nm
• 100 GbE up to approximately 125 meters at 850 nm

What physical features and testing standards ensure reliability?

RamboCables builds these duplex cords with a 2.0 mm cable diameter, a low-smoke zero-halogen (LSZH) outer jacket for safer indoor environments, and zirconia ceramic ferrules for consistent connector geometry. Each cable undergoes inspection to meet common EIA/TIA optical interface expectations.

• 50/125 µm core/cladding multimode construction
• 2.0 mm jacket diameter with 7.5 mm bend radius tolerance
• LSZH outer jacket for reduced smoke/toxic emissions
• 100% inspection for insertion loss and endface quality

How does buying the 2-pack help installations and inventory?

Purchasing two identical OM4 LC–LC patch cords simplifies purchasing, reduces per-unit cost, and ensures matched performance for duplex runs. The matched set is convenient for redundant links, parallel paths, or stocking spare cables for fast swaps.

• Two identical 40 m cords in one package for matched runs
• Cost-effective compared with single-cable purchases
• Convenient for redundant or mirrored connections
• Saves rack space with slim 2.0 mm duplex assemblies

Who is this for: Network engineers, data-center operators, telecom technicians, and IT teams seeking reliable multimode patching for 10G/40G/100G short-reach links will benefit from these RamboCables OM4 LC–LC duplex cords. They suit high-density cabinets, patch panels, and environments where low-smoke materials and predictable optical performance are required.