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QSFP-100G-LR4-S, Cisco QSFP-100G-LR4-S – 100GBASE-LR4 QSFP28 Transceiver Module, Original, New

$674.90 USD

Ready to ship  -  1 left

Warranty: Lifetime

Quick answer: The Cisco QSFP-100G-LR4-S is a 100GBASE-LR4 QSFP28 optic that runs 100 Gigabit Ethernet up to 10 km over single-mode fiber, using four wavelengths near 1310 nm on a duplex LC connector, with DOM. This listing is a genuine Cisco module. Resilient Tec sells it new, with a lifetime warranty and free US shipping from Knoxville, TN.

Condition: New

Cisco QSFP-100G-LR4-S – 100GBASE-LR4 QSFP28 Transceiver Module

The Cisco QSFP-100G-LR4-S is a high-performance QSFP28 optical transceiver that delivers 100 Gigabit Ethernet connectivity over single-mode fiber. Designed for data centers, enterprise networks, and high-capacity backbone links, this module supports transmission distances up to 10 kilometers, providing reliable long-reach connections with low power consumption.

  • Form Factor: QSFP28

  • Data Rate: 100 Gbps

  • Wavelengths: 4 × 25 Gbps channels (1295 – 1309 nm)

  • Cable Type: Single-mode fiber (SMF)

  • Max Distance: Up to 10 km

  • Connector: Duplex LC

  • Operating Temperature: 0°C to 70°C

  • Hot-swappable: Yes

  • Digital Diagnostics (DOM): Supported

Engineered for Cisco platforms, the QSFP-100G-LR4-S ensures seamless compatibility and dependable high-speed optical performance.

Frequently Asked Questions

What fiber does it use?
Single-mode OS2 (9/125 µm) fiber with duplex LC connectors. It will not work over multimode fiber.

LR4 or SR4: which do I need?
LR4 is for single-mode runs up to 10 km, such as between buildings or rooms. SR4 is the lower-cost choice for multimode runs up to 100 m inside a data center, using MPO cabling.

Can I connect it to an LR4 optic from another brand?
Yes. 100GBASE-LR4 is an IEEE standard, so it links with any LR4 optic on the far end.

Is this an original Cisco part?
Yes, a Cisco-branded QSFP-100G-LR4-S, sold new. It is also available refurbished.

What warranty and shipping come with it?
Resilient Tec's lifetime warranty. US standard shipping is free with no minimum, and orders typically arrive in 3 to 5 days.

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S
Seun Adeyemi
Cisco 100G QSFP28 LR4 — rock solid for long-distance fiber links

We use Cisco QSFP-100G-LR4-S modules for inter-building SMF links across our campus. These genuine Cisco original modules come up without any compatibility warnings on Catalyst 9500 and Nexus 93xx. Optical power levels are factory calibrated and the LR4 wavelengths are rock solid over our 8km fiber run. Worth the price for genuine Cisco in a production SMF environment.

Thank you Seun! Genuine Cisco LR4 over an 8km SMF campus run with no compatibility warnings is the gold standard. Factory-calibrated optical levels are always the right choice for long-distance production links!