HPE JH681A

(X140) 40 Gb QSFP+ CSR4 MPO Multimode Transceiver (850 nm, 300 m)

The HPE JH681A (X140 series) is a 40 Gigabit Ethernet CSR4 Transceiver utilizing an MPO/MTP connector and 850 nm VCSEL optics Designed for campus or short-run multimode fiber links, it supports distances up to 300 m over OM3 or up to 400 m over OM4 fiber. Ideal for connecting switches, servers, or storage units in data centers, wiring closets, or campus backbone fabrics, this module enables dense parallel fiber connectivity in HPE campus and FlexNetwork switching platforms—ensuring high-performance, standards-compliant deployment.

Features

Built to comply with IEEE 802.3ba 40GBASE-SR4 standards, the JH681A employs four parallel VCSEL Transceiver channels, each running at 10 Gbps, resulting in a full-duplex 40 Gbps link. It connects via a 12‑fiber MPO/MTP cable, paired to 4×10 Gb SFP+ endpoints on the other side by breakout or fan‑out cabling. It integrates Digital Diagnostic Monitoring (DDM/DOM) for real-time voltage, temperature, and optical power tracking. With a low power draw and compact QSFP+ form factor, it provides hands‑free deployment and hot‑pluggable support in supported HPE X140 switch modules and campus fiber platforms.

Advanced Options

Engineered for high-density campus and data center fabrics, the JH681A delivers reliable low-latency connectivity using CSR4 parallel optics. The robust VCSEL and PIN receiver modules ensure signal integrity over multimode links.