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Small rectangular QSFP+ transceiver module with MPO port, matte metal finish

Cisco Systems, Inc.

Cisco Systems, Inc. QSFP-40G-SR4-S= 40GBASE-SR4 SFP transceiver

SKU CH-1FH7-5TDPB MPN QSFP-40G-SR4-S=

Hot-swappable QSFP+ transceiver delivers 40 Gigabit Ethernet over multi-mode fibre up to 492 ft. at 850 nm

  • Port count1 x Ethernet 40GBASE-SR4 - MTP / MPO multi-mode
  • Product typeTransceiver
  • Supported standardsFCC CFR21 Part 1040, GR-326-CORE, GR-20-CORE, GR-1435-CORE,
  • Optical wavelength840-860 nm
  • Maximum range492 ft (150 m)
  • Power adapter1.5 W
  • Hot-swappable QSFP module installs without network downtime
  • 40 Gbit/s over multimode fibre up to 492 ft
  • Compliant with IEEE 802.3ba and multiple MSA standards
  • Tested on Cisco 40G ports for reliable interoperability
  • Low 1.5 W power draw reduces chassis thermal load

40GBASE-SR4 QSFP+ transceiver

This Cisco QSFP-40G-SR4-S= module delivers 40 Gigabit Ethernet over multi-mode fibre using an 850 nm wavelength and MTP/MPO connector. It is a hot-swappable transceiver designed for Cisco QSFP ports and certified to IEEE 802.3ba.

Suits links up to 492 ft on OM3/OM4 fibre.

The module operates at 840-860 nm and reaches 492 ft on multi-mode fibre, making it appropriate for short-range data-centre interconnects. It will not function on single-mode cable plants or distances beyond the specified multi-mode reach.

Maximum reach of 492 ft on multi-mode fibre

The 492 ft distance limit at 850 nm is the key parameter that determines whether this transceiver matches the link budget. Verify the patch length and fibre grade before deployment.

How it compares

Measured against everything we stock in SFP & SFP+ Transceiver Modules, at today’s prices. Recalculated every night.

Price $986.99
Pricier than about 90% of the 1,471 comparable items (median $138.99).

Specifications

Product
Brand nameCISCO
Model nameQSFP-40G-SR4-S=
Product typeTransceiver
Connectivity
Supported standardsFCC CFR21 Part 1040, GR-326-CORE, GR-20-CORE, GR-1435-CORE, MSA SFF-8431, MSA SFF-8436, IEC 60825-1 Class 1
Optical wavelength840-860 nm
Maximum range492 ft (150 m)
Ports & slots
Port count1 x Ethernet 40GBASE-SR4 - MTP / MPO multi-mode
Power
Power adapter1.5 W
Size & build
Product dimensions0.5 in × 0.7 in × 2.9 in
Product weight0.22 lb (0.1 kg)
Shipping weight0.02 kg
Package size130 × 150 × 1 mm
Environment & compliance
Temperature range32 to 158 degree Fahrenheit

Questions about this item

How do I install the QSFP-40G-SR4-S= into a Cisco 40G QSFP port and which step is often missed?

Slide the module straight into the port until the latch clicks; the step people miss is removing the dust caps from both the transceiver and the MPO patch cord before insertion.

What maintenance or replacement will the QSFP-40G-SR4-S= need over time?

The MPO connector end-faces should be inspected and cleaned with a lint-free wipe and isopropyl alcohol whenever links show errors; the module itself has no user-serviceable parts and is replaced only if it fails.

What limit appears first when the QSFP-40G-SR4-S= runs continuously at full load?

The operating temperature ceiling of 158 °F is the first sustained-use limit; if chassis airflow cannot keep the module below that, the link will throttle or shut down.

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