HPE 1990-4725

Aruba (JL484A) 25 Gb SFP28 LC SR Transceiver module

The HPE Aruba 1990‑4725, also known as JL484A, is a short‑reach SFP28 Transceiver module designed for 25 Gigabit Ethernet over multimode fiber. Operating at 850 nm wavelength with dual LC connectors, it reliably supports communications up to approximately 100 meters over OM4 fiber or ~70 m on OM3. Its compliance with industry standards (IEEE 802.3by, SFF‑8402, SFF‑8432, SFF‑8472) ensures broad interoperability and OEM certification for seamless use in Aruba and compatible HPE platforms such as the CX series switches. With integrated digital optical monitoring (DOM), administrators can track real‑time transmit/receive optical power, temperature, and voltage for proactive network maintenance.

Features

This SFP28 module delivers 25 Gbps line rates using 25GBASE‑SR signaling, suitable for high‑density data center interconnects, spine-leaf links, and server-to-switch uplinks. It supports backward compatibility, operating at 10 Gbps when needed, making it versatile in mixed-speed LAN environments . The module features a VCSEL-based transmitter and PIN photodiode receiver, delivering optical output power between –6.0 dBm and +2.4 dBm and receiver sensitivity better than –10.3 dBm Designed with a plug-and-play SFP28 form factor, it draws +3.3 V power and supports DOM diagnostics via I2C interface, allowing monitoring of fiber link health metrics . Tested for operation from 0°C to +70°C, it meets RoHS and industry laser safety class 1 standards, ensuring reliability in typical data center environments

Advanced Options

The 1990‑4725 module is officially supported for Aruba CX and 8325 switch series, making it an OEM‑certified component for critical fabric links where 25 GbE bandwidth and low-latency connectivity are required Built with high-quality optical components, the module delivers consistent 25 Gbps throughput with minimal signal degradation over short distances. Its VCSEL-based transmitter ensures efficient optical performance and low jitter, while the receiver's sensitivity supports the typical link budgets required for MMF installations