Name: 40GBASE-ER4, Transceiver, LC, 40KM, 1310 nm, SMF
Brand: Cisco
Price: 2937.95 USD
Availability: InStock

Cisco QSFP-40G-ER4 40GBASE-ER4, Transceiver, LC, 40KM, 1310 nm, SMF

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$2,937.95

In Stock: 8
Manufacturer: Cisco
Model or Part: QSFP-40G-ER4
Condition: New
Weight: 1.00lb

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Description

Overview

The Cisco QSFP-40G-ER4 (part number QSFP-40G-ER4) is a high-performance 40GBASE-ER4 optical transceiver designed for long-reach single-mode fiber (SMF) networks. Operating at a wavelength of 1310 nm, this LC-coupled module delivers reliable 40 Gbps transmission over distances up to 40 km, making it ideal for carrier-grade data center interconnects, metro aggregation, and high-speed campus backbones. Built to Cisco standards, the transceiver provides seamless integration with Cisco QSFP-28 ports and supports industry-approved interoperability for maximum flexibility.

Key Features

40 Gbps data rate per lane with 4 lanes (QSFP-28 form factor)
Long-reach 40 km transmission over standard single-mode fiber
1310 nm wavelength optimized for low attenuation
LC duplex connector for easy fiber management
Digital diagnostics monitoring (DDM) for real-time performance tracking
Hot-plug capable for non-disruptive network upgrades
Low power consumption to reduce overall system heat

Technical Specifications

Form factor: QSFP-28 (Quad Small Form-Factor Pluggable)
Optical interface: LC duplex
Wavelength: 1310 nm
Reach: 40 km on standard SMF (OS1/OS2)
Transmit power: -9.5 dBm typical
Receive sensitivity: -26 dBm typical
Operating temperature: 0 to 70 degrees C
Power consumption: 3.5 W max
Compliance: IEEE 802.3ba, 802.3bm, 802.3cd

Applications

Data center interconnect (DCI) linking geographically dispersed sites
Metro Ethernet and carrier networks requiring long-haul 40 Gbps links
High-speed campus backbone and campus-to-core aggregation
Financial trading platforms needing ultra-low latency over extended distances
Research and education networks that demand high bandwidth over fiber runs

By choosing the Cisco QSFP-40G-ER4, network operators gain a proven, scalable solution that extends 40 Gbps connectivity across up to 40 km of SMF, ensuring future-ready performance for bandwidth-intensive applications.