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Cisco QSFP transceiver module with dual LC ports, matte metal finish

Cisco Systems, Inc.

Cisco Systems, Inc. QSFP-40G-SR-BD= 40 Gbps SFP transceiver

SKU CH-K31X-CCAGY MPN QSFP-40G-SR-BD=

A hot-swappable 40 Gbps QSFP transceiver for 40 Gigabit Ethernet over LC multi-mode fibre up to 492 ft, operating at 832 to 918 nm and +10 to 70 °C

  • Device TypeQSFP Transceiver Modules
  • Wavelength832 - 918nm
  • Ports1 x 40Gb Ethernet - LC Multi-Mode x 2
  • Max Distance492 ft.
  • Transfer Rate40 Gbps
  • Temperature+10 to 70°C (50 to 158°F)
  • 40 Gbps throughput for high-density links
  • Hot-swappable QSFP module installs without downtime
  • Dual LC multi-mode ports reach 492 ft
  • Operates reliably from 10 to 70 °C
  • Certified on Cisco 40G ports for proven interoperability

40 Gbps BiDi QSFP module

This Cisco QSFP-40G-SR-BD= transceiver delivers 40 Gbps over duplex LC multi-mode fibre using a single module. It operates across the 832 to 918 nm wavelength range and reaches up to 492 ft. The hot-swappable QSFP form factor plugs directly into a 40 Gigabit Ethernet Cisco QSFP port. Certified testing on Cisco hardware ensures reliable operation.

Ideal for short-reach 40G links

Network teams extending 40 GbE connections within a rack or between adjacent racks over existing duplex multi-mode cabling will find this module a direct fit. It suits environments that stay within the +10 to 70 °C operating window. Builders needing single-mode reach, higher port density, or non-Cisco qualified optics should evaluate other form factors.

492 ft multi-mode reach

The 492 ft maximum distance over LC multi-mode fibre is the specification that determines whether this transceiver meets the link-length requirement. Longer runs or single-mode infrastructure require a different optical solution.

Highlights

  • 40 Gbps throughput for high-density links
  • Hot-swappable QSFP module installs without downtime
  • Dual LC multi-mode ports reach 492 ft
  • Operates reliably from 10 to 70 °C
  • Certified on Cisco 40G ports for proven interoperability

Specifications

BrandCISCO
ModelQSFP-40G-SR-BD=
Device TypeQSFP Transceiver Modules
Wavelength832 - 918nm
Ports1 x 40Gb Ethernet - LC Multi-Mode x 2
Max Distance492 ft.
Transfer Rate40 Gbps
Temperature+10 to 70°C (50 to 158°F)
FeatureHot-swappable input/output device that plugs into a 40 Gigabit Ethernet Cisco QSFP port
Interoperable with other IEEE-compliant 40GBASE interfaces where applicable
Certified and tested on Cisco QSFP 40G ports for superior performance, quality, and reliability
High-speed electrical interface compliant to the IEEE 802.3ba standard
QSFP Form factor, 2-wire I2C communication interface and other low-speed electrical interface compliant to SFF 8436 and QSFP Multisource Agreement (MSA)
Dimensions0.53" x 0.72" x 2.85"
Weight0.22 lbs.
Shipping weight0.14 kg
Package size127 × 51 × 51 mm

Questions about this item

Will the LC duplex connectors on this QSFP-40G-SR-BD= need periodic cleaning or replacement?

The dual LC multi-mode connectors should be inspected and cleaned with a fibre scope and lint-free wipes whenever links are added or removed; no scheduled replacement interval is defined by the manufacturer.

What is the first limit reached when this module runs continuously at 40 Gbps in a 70 °C environment?

The operating-temperature ceiling of 70 °C (158 °F) is the primary sustained-use limit; exceeding it can trigger thermal shutdown.

How much heat does the QSFP-40G-SR-BD= add to a switch chassis when it operates all day?

The transceiver is hot-swappable and draws power from the host QSFP port; Cisco does not publish a standalone heat-dissipation figure for this module.

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