Cisco QSFP-40G-SR4 40GBASE-SR4 QSFP+ Transceiver, Refurbished
Warranty: Lifetime
Quick answer: The Cisco QSFP-40G-SR4 is a 40GBASE-SR4 QSFP+ optic that runs 40 Gigabit Ethernet over multimode fiber at 850 nm, up to 100 m on OM3 and 150 m on OM4, through a single MPO-12 connector. This listing is a genuine Cisco module. Resilient Tec sells it refurbished, with a lifetime warranty and free US shipping from Knoxville, TN.
Condition: Refurbished
The Cisco QSFP-40G-SR4 is a hot-swappable, 40GBASE-SR4 QSFP+ transceiver designed for high-speed Ethernet connectivity over multimode fiber. Featuring an MPO connector, it supports 40 Gigabit Ethernet for high-density, short-range connections, making it ideal for data center spine-leaf architectures and aggregation links.
Key Specifications
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Data Rate: 40Gbps (4x10Gbps lanes)
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Interface: MPO-12 connector
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Cable Type: Multimode fiber (MMF)
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Wavelength: 850nm
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Distance: Up to 100m on OM3 MMF, 150m on OM4 MMF
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Power Consumption: 1.5W
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Operating Temperature: Commercial range, 0°C to 70°C (32°F to 158°F)
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Form Factor: QSFP+
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Compatibility: Supports a wide range of Cisco switches and routers (e.g., Nexus 9000, Catalyst 9500 series)
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Standards: IEEE 802.3ba, QSFP+ MSA, RoHS compliant
Frequently Asked Questions
What cable does it need?
A 12-fiber MPO trunk with flat (UPC) endfaces on multimode OM3 or OM4 fiber, female on both ends. Angle-polished (APC) MPO cables, such as those built for NVIDIA NDR optics, will not mate with it.
Can it break out to 4 x 10G?
Yes, on platforms that support breakout: with an MPO to 4 x duplex LC breakout cable, one QSFP-40G-SR4 can connect to four 10GBASE-SR SFP+ ports. Check that your switch port supports breakout mode.
Can I reuse my existing duplex LC fiber for 40G?
Not with SR4, which needs MPO. A BiDi optic such as the QSFP-40/100-SRBD runs over existing duplex LC multimode fiber.
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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Cisco QSFP-40G-SR4, new
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Quick answer: The Cisco QSFP-40G-SR4 is a 40GBASE-SR4 QSFP+ optic that runs 40 Gigabit Ethernet over multimode fiber at 850 nm, up to 100 m on OM3 and 150 m on OM4, through a single MPO-12 connector. This listing is a genuine Cisco module. Resilient Tec sells it refurbished, with a lifetime warranty and free US shipping from Knoxville, TN.
Condition: Refurbished
The Cisco QSFP-40G-SR4 is a hot-swappable, 40GBASE-SR4 QSFP+ transceiver designed for high-speed Ethernet connectivity over multimode fiber. Featuring an MPO connector, it supports 40 Gigabit Ethernet for high-density, short-range connections, making it ideal for data center spine-leaf architectures and aggregation links.
Key Specifications
-
Data Rate: 40Gbps (4x10Gbps lanes)
-
Interface: MPO-12 connector
-
Cable Type: Multimode fiber (MMF)
-
Wavelength: 850nm
-
Distance: Up to 100m on OM3 MMF, 150m on OM4 MMF
-
Power Consumption: 1.5W
-
Operating Temperature: Commercial range, 0°C to 70°C (32°F to 158°F)
-
Form Factor: QSFP+
-
Compatibility: Supports a wide range of Cisco switches and routers (e.g., Nexus 9000, Catalyst 9500 series)
-
Standards: IEEE 802.3ba, QSFP+ MSA, RoHS compliant
Frequently Asked Questions
What cable does it need?
A 12-fiber MPO trunk with flat (UPC) endfaces on multimode OM3 or OM4 fiber, female on both ends. Angle-polished (APC) MPO cables, such as those built for NVIDIA NDR optics, will not mate with it.
Can it break out to 4 x 10G?
Yes, on platforms that support breakout: with an MPO to 4 x duplex LC breakout cable, one QSFP-40G-SR4 can connect to four 10GBASE-SR SFP+ ports. Check that your switch port supports breakout mode.
Can I reuse my existing duplex LC fiber for 40G?
Not with SR4, which needs MPO. A BiDi optic such as the QSFP-40/100-SRBD runs over existing duplex LC multimode fiber.
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.
You Might Also Need
Cisco QSFP-40G-SR4, new
Cisco QSFP-40/100-SRBD (duplex LC BiDi)
Cisco QSFP-H40G-CU1M 40G DAC
All fiber cables
All transceivers