• Red and silver QSFP-40G-ER4 Arista fiber optic connector
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Blue Cable Co

QSFP-40G-ER4-Arista-BCC | Arista Compatible 40GB Single-Mode ER4 Transceiver - 40km (40GBASE-ER4)

QSFP-40G-ER4-Arista-BCC

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$2,062.50 inc. GST
$1,875.00 ex. GST
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Description

The QSFP-40G-ER4-Arista-BCC is a drop-in compatible replacement for the Arista QSFP-40G-ER4. This QSFP+ transceiver delivers plug-and-play compatibility with Arista 40G Ethernet switches and routers, providing 40Gbps throughput over single-mode fibre. - IEEE 802.3ba 40GBASE-ER4 compliance guarantees interoperability with any standards-compliant 40G Ethernet equipment - QSFP+ form factor supporting 40Gbps over duplex LC single-mode fibre at 1310nm (CWDM wavelengths: 1271, 1291, 1311, 1331 nm) with reach up to 40km - Four 10Gbps electrical lanes multiplexed into four CWDM optical channels for extended-reach transmission over a single fibre pair - Digital diagnostics monitoring (DDM) for real-time access to optical power, temperature, bias current, and supply voltage parameters - Hot-swappable QSFP+ MSA-compliant module with duplex LC connector, suitable for metro networks, data centre interconnect, and campus backbone links - Operating temperature range 0 to 70 degrees Celsius, single +3.3V power supply

Features

• Four-lane CWDM architecture using 1271, 1291, 1311, and 1331 nm wavelengths as defined in ITU-T G.694.2, enabling 40Gbps transmission over a single duplex LC fibre pair instead of parallel multi-mode ribbon cable
• IEEE 802.3ba 40GBASE-ER4 compliance ensures optical interoperability with any vendor platform implementing the standard, supporting metro network aggregation, data centre interconnect, and extended campus links
• Integrated multiplexer and demultiplexer convert four electrical 10Gbps lanes into four CWDM optical signals, maximising infrastructure efficiency and reducing fibre count compared to parallel optics like SR4
• DDM functionality accessible via I2C serial interface per QSFP+ MSA specification, providing per-channel TX and RX optical power monitoring plus module temperature, bias current, and voltage telemetry
• Hot-swappable QSFP+ form factor with pull-tab bail latch allows module insertion and removal without powering down the host system, meeting SFF-8436 electrical interface requirements
• Single-mode fibre requirement (G.652 SMF recommended) supports the extended 40 km reach while maintaining low chromatic dispersion, with optical attenuation recommended for links shorter than 10 km to protect receiver sensitivity
• Power consumption typically below 3.5W from a single +3.3V supply, with commercial temperature range (0 to 70 degrees Celsius) suitable for standard data centre and telecom environments

Warranty

5-Year Advanced Warranty on All Blue Cable Co® Products

Blue Cable Co® offers a comprehensive 5-Year Advanced Warranty on all our branded products. Our advanced warranty ensures fast, hassle-free replacements to keep your network running smoothly. If a fault occurs, we’ll deliver a replacement part before you return the faulty item—minimising downtime and giving you complete peace of mind.

Choose Blue Cable Co® for reliable, high-quality network components backed by industry-leading warranty support.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Compatible SFP Selector

Technical Specifications

Brand: Blue Cable Co
BCC SKU: QSFP-40G-ER4-Arista-BCC
Compatible Replacement For: QSFP-40G-ER4-Arista
Compatibility: Arista compatible
Lab Testing: Tested in Sydney, Australia
Warranty: 5-year advanced hardware replacement (Blue Cable Co)
Form Factor: QSFP+
Data Rate: 40 Gbps
Wavelength: 1271 nm, 1291 nm, 1311 nm, 1331 nm (4x CWDM lanes)
Fibre Type: Single-mode (SMF)
Connector Type: Duplex LC
DOM Support: Yes (Digital Diagnostics Monitoring)
Standards: IEEE 802.3ba 40GBASE-ER4, QSFP+ MSA, SFF-8436
Max Reach: Up to 40 km (per datasheet, subject to fibre quality and link budget)
Operating Temperature: 0 to 70 degrees Celsius
Power Supply: Single +3.3V

FAQs

Q: Will this work in place of the Arista QSFP-40G-ER4?
A: Yes. This transceiver is a plug-and-play replacement for the Arista QSFP-40G-ER4. It meets the same IEEE 802.3ba 40GBASE-ER4 standard, uses the same QSFP+ form factor, and delivers the same 40 Gbps data rate over duplex single-mode fibre with CWDM wavelengths at 1271, 1291, 1311, and 1331 nm. The module will operate identically to the OEM part in any Arista 40G QSFP+ port.

Q: Which Arista platforms support this transceiver?
A: This transceiver works in any Arista switch or router with a QSFP+ port supporting 40GBASE-ER4 optics. According to Arista documentation, the QSFP-40G-ER4 is supported from EOS version 4.14.5 onwards. It is compatible with Arista 40G platforms that meet the QSFP+ MSA electrical interface specification and support the IEEE 802.3ba 40GBASE-ER4 standard.

Q: What fibre type and reach does this transceiver support?
A: This transceiver requires single-mode fibre (SMF), specifically ITU-T G.652 compliant OS2 cable. It supports transmission distances up to 40 km using four CWDM wavelengths multiplexed onto a single duplex LC fibre pair. For links shorter than approximately 10 km, optical attenuation may be required to prevent receiver damage from excessive input power.

Q: How does the four-lane CWDM architecture work in this module?
A: The module converts four independent electrical input lanes (each running at approximately 10.3125 Gbps) into four distinct CWDM optical wavelengths at 1271, 1291, 1311, and 1331 nm. An integrated optical multiplexer combines these four wavelengths onto a single transmit fibre strand. At the receiver end, a demultiplexer separates the four wavelengths and converts them back to four electrical lanes, delivering aggregate 40 Gbps throughput while using only two fibre strands instead of the eight required by parallel optics like 40GBASE-SR4.

Q: Can I monitor link health and optical parameters in real time?
A: Yes. The module supports digital diagnostics monitoring (DDM) accessible via the I2C serial interface as defined in the QSFP+ MSA specification. You can read real-time parameters including per-channel transmit optical power, per-channel receive optical power, module temperature, laser bias current, and supply voltage. These parameters allow proactive link quality monitoring, troubleshooting, and detection of degrading components before link failure occurs.

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100% compatible with equipment from major vendors

Coded and tested in our state of the art lab in Sydney

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Tested on real vendor hardware in Sydney

Every Blue Cable Co transceiver is coded for your platform and tested in our Sydney test rack on real vendor switches and firewalls before it ships. We check it is recognised and links up the same way the OEM optic does, so you don't find an "unsupported transceiver" error after it's installed.

Brands tested: Cisco, Meraki, Arista, Aruba, HPE, Juniper, Dell, Fortinet, Palo Alto, Check Point, Sophos, Moxa and NVIDIA. Speeds up to 100Gb.

  • 5 year replacement warranty
  • Sydney stock
  • Re-coding if you need it

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