HPE Aruba J4858D 1G SFP LC SX Transceiver – 1000BASE-SX, 850nm, 550m Multimode

Reliable Gigabit fiber links for HPE Aruba switches.

The HPE J4858D is a 1000BASE-SX SFP transceiver that carries 1 Gbps over multimode fiber at 850 nm with a duplex LC connector. It is designed for HPE Aruba switches with SFP ports (such as 2530, 2540, 2930F, 2930M, 3810 and CX series), reaching up to 550 m on multimode fiber.

Why Matching Optics Matter for Stable Fiber Links

Fiber links fail in frustrating ways when optics are mismatched: the link may not come up, may flap under load, or may log errors that slowly degrade performance. Third-party modules can also trigger unsupported-transceiver messages on HPE switches.

The J4858D follows the IEEE 1000BASE-SX standard at 850 nm, so it interoperates with any compliant optic at the other end of the link, and as a genuine HPE part it is recognized by HPE firmware without workarounds.

With a reach of up to 550 m on multimode fiber, it suits links between wiring closets, floors and racks.

1000BASE-SX Performance and Reach

The J4858D runs at 1 Gbps using an 850 nm laser over multimode (OM1–OM4) fiber, reaching up to 550 m on multimode fiber. Both ends of the link must use matching 1000BASE-SX optics.

Hot-Swappable with Diagnostics

The module can be inserted or removed while the device is running. Supported HPE switches report optical diagnostics such as transmit and receive power, which help find dirty connectors or damaged fiber.

How to Install the HPE J4858D

1. Confirm the host port supports 1000BASE-SX SFP modules and that the other end of the link uses a matching optic.
2. Remove the dust plug and slide the transceiver into the port until it latches.
3. Clean the LC connectors and connect a multimode duplex patch cord, crossing transmit and receive.
4. Verify link status and optical levels from the switch or array management interface.