• Silver-colored Arista QSFP-40G-ER4 40GBASE-ER4 QSFP+ transceiver modules with blue handles and metal connectors for 40km SMF
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Arista

Arista QSFP-40G-ER4 | 40GBASE-ER4 QSFP+ Transceiver, 40km, SMF, Duplex LC

Arista QSFP-40G-ER4 | 40GBASE-ER4 QSFP+ Transceiver, 40km, SMF, Duplex LC

QSFP-40G-ER4

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Description

The Arista QSFP-40G-ER4 is a 40GBASE-ER4 QSFP+ transceiver delivering 40 Gbps over single-mode fibre (SMF) at distances up to 40km — ideal for data centre interconnects, metro networks, and long-haul enterprise links. Using four CWDM LAN WDM channels (1271, 1291, 1311, 1331 nm) over a single duplex LC fibre pair, it complies with IEEE 802.3ba and the QSFP+ MSA (SFF-8436/SFF-8636), ensuring broad compatibility with standard 40GBASE-ER4 interfaces.

Digital Optical Monitoring (DOM) provides real-time visibility into optical power levels, temperature, bias current, and supply voltage for simplified fault isolation and proactive maintenance. The hot-swappable QSFP+ form factor allows non-disruptive replacement, while a maximum power draw of just 3.5W keeps thermal overhead low. Order direct from iptrading.com.au — Australian-owned and operated since 2001.

Features

- 4-channel CWDM LAN WDM multiplexing/demultiplexing — 40G over a single duplex LC fibre pair
- Supports link lengths up to 40km over OS2/G.652 single-mode fibre
- IEEE 802.3ba 40GBASE-ER4 and QSFP+ MSA compliant for broad interoperability
- Digital Optical Monitoring (DOM) — real-time visibility of optical power, temperature, bias current, and supply voltage
- Hot-swappable and electrically hot-insertable QSFP+ form factor for non-disruptive maintenance
- Low power consumption — max 3.5W to minimise thermal load in high-density deployments
- Suited for data centre interconnects, metro networks, campus backbones, and long-haul enterprise applications
- Interoperable with standard 40GBASE-ER4 interfaces from third-party vendors

Warranty

Arista hardware products come with a 1-year limited hardware warranty, covering defects in materials and workmanship under normal use.
Extended Warranty Options:
IP Trading offers tailored extended warranty solutions and support packages for Arista products. Contact our team to explore options that align with your organisation's needs.
https://www.arista.com/assets/data/pdf/Warranty.pdf

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

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Technical Specifications

FAQs

Datasheet

Technical Specifications

- Data Rate: 40 Gbps (4 x 10 Gbps channels)
- Form Factor: QSFP+
- Standard: IEEE 802.3ba 40GBASE-ER4
- Fiber Type: Single-Mode Fibre (SMF) / OS2 (G.652)
- Maximum Reach: Up to 40km
- Wavelengths: 4 x CWDM — 1271, 1291, 1311, 1331 nm (ITU-T G694.2)
- Connector: Duplex LC
- Max Power Consumption: 3.5W
- Operating Temperature: 0°C to 70°C (commercial)
- Compliance: IEEE 802.3ba, QSFP+ MSA (SFF-8436 / SFF-8636)
- Digital Diagnostics Monitoring (DDM/DOM): Supported
- Hot-Swappable: Yes

FAQs

Q: What maximum fibre distance does the QSFP-40G-ER4 support?
A: The Arista QSFP-40G-ER4 supports link distances of up to 40km over OS2 single-mode fibre (G.652), making it suitable for metro network interconnects, long-haul campus links, and extended data centre interconnects.

Q: What fibre and connector type does this transceiver require?
A: It requires OS2 single-mode fibre (SMF) and uses a duplex LC connector. It is not compatible with multi-mode fibre (MMF) or different connector types such as MPO.

Q: Is the QSFP-40G-ER4 compatible with other vendors' 40GBASE-ER4 switches?
A: Yes. The QSFP-40G-ER4 is compliant with the QSFP+ MSA (SFF-8436/SFF-8636) and IEEE 802.3ba 40GBASE-ER4, allowing interoperability with standard 40GBASE-ER4 interfaces from third-party switch vendors. However, compatibility coding may vary — confirm with your platform vendor before deployment.

Q: Does this transceiver support Digital Optical Monitoring (DOM)?
A: Yes. The QSFP-40G-ER4 supports DOM (also called DDM), giving network operators real-time visibility into optical transmit/receive power, temperature, laser bias current, and supply voltage directly from the switch management interface.

Q: Can I hot-swap the QSFP-40G-ER4 without disrupting other ports?
A: Yes. The QSFP+ form factor is hot-swappable and electrically hot-insertable, allowing modules to be installed or replaced while the switch remains powered and other ports continue operating normally.

Q: Can I purchase the Arista QSFP-40G-ER4 in Australia from IP Trading?
A: Yes. IP Trading (iptrading.com.au) is an Australian-owned and operated IT hardware reseller, established in 2001, supplying transceivers including the Arista QSFP-40G-ER4 to Australian businesses. Order directly via the website or contact the sales team for volume pricing and availability.

Datasheet

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