Replacement for J4858B-AS: Drop-In Alternatives We Stock
Looking for a replacement for the J4858B-AS (J4858B-AS - Agilestar 1Gbps 1000Base-SX Mini-GBIC 850nm LC Connector SFP Transceiver Module)? Pro Disk Network ships drop-in replacements and equivalent modern parts from US inventory. Every alternate below is in-stock today with same-day shipping for orders placed before 2pm ET. If your unit is still under warranty, contact our engineering team — we offer cross-shipping for B2B customers on Net 30 terms.
About the J4858B-AS
| SKU | J4858B-AS |
|---|---|
| Product | J4858B-AS - Agilestar 1Gbps 1000Base-SX Mini-GBIC 850nm LC Connector SFP Transceiver Module |
| Current price | $164.04 |
| Stock status | In Stock |
| Detail page | View J4858B-AS › |
Drop-in replacements for J4858B-AS
Each part below is currently in our US warehouse, ships same-day for orders before 2pm ET, and includes our 90-day warranty. SKUs link to the full product page with photos, datasheets and B2B quote form.
J4858C-AS - Agilestar HP ProCurve Gigabit-SX-LC 1000Base-SX Mini-GBIC 850nm SFP Transceiver Module
SKU: J4858C-AS
Price: $206.34
NS-SYS-GBIC-MSX-ACC - Accortec 1.25Gb/s 1000Base-SX Multi-Mode Fiber 550m 850nm Duplex LC Connector SFP (mini-GBIC) Transceiver Module for Juniper Compatible
SKU: NS-SYS-GBIC-MSX-ACC
Price: $182.37
SFP-SX-ACC - Accortec 1Gb/s 1000Base-SX Multi-Mode Fiber 550m 850nm Duplex LC Connector SFP (mini-GBIC) Transceiver Module
SKU: SFP-SX-ACC
Price: $101.61
XFP-10G-SR-AS - Agilestar 10Gbps 10GBase-SR Multi-mode Fiber 300m 850nm Duplex LC Connector XFP Transceiver Module
SKU: XFP-10G-SR-AS
Price: $278.80
GP-XFP-1S-AS - Agilestar 10.5Gbps 10GBase-SR Multi-mode Fiber 300m 850nm Duplex LC Connector XFP Transceiver Module
SKU: GP-XFP-1S-AS
Price: $773.26
SFP-OC3-LR1-AS - Agilestar OC-3/STM-1 LR-1 Single-mode Fibre 40km 1310nm LC Connector SFP Transceiver Module
SKU: SFP-OC3-LR1-AS
Price: $126.11
OC3-SFP-LR1-AS - Agilestar ATM/SONET OC-3/STM-1 LR-1 Single-mode Fibre 40km 1310nm LC Connector SFP Transceiver Module
SKU: OC3-SFP-LR1-AS
Price: $2,352.29
33210-100 - Brocade 1Gb/s 1000Base-SX Multi-Mode Fiber550m 850nm LC Connector SFP (mini-GBIC) Transceiver Module
SKU: 33210-100
Price: $68.42
E1MG-SX - IBM 1000Base-SX 850nm 550m LC Connector mini-GBIC SFP Transceiver Module
SKU: E1MG-SX
Price: $71.58
AFBR-57R5APZ - Avago 1Gb/s 1000Base-SX Multi-Mode 550m 850nm LC Connector SFP (mini-GBIC) Transceiver Module
SKU: AFBR-57R5APZ
Price: $71.58
How we pick replacements
Every recommendation above was selected using these criteria:
- Drop-in compatibility — same form factor (2.5"/3.5", PCIe slot, SFP port, etc.), so it fits the original chassis without modification
- Equivalent or better performance — matched on RPM/IOPS/speed/throughput, never downgraded
- Same-brand-preferred — we list the OEM-equivalent first when available, then trusted aftermarket
- Warranty coverage — 90-day Pro Disk warranty on every part, with 1-year option for B2B
- In stock today — never recommend a part that is on backorder
Need help confirming compatibility?
Our engineers validate every replacement against your specific server, switch, or chassis model before shipment. Email sales@prodisknetwork.com with your platform model (e.g., Dell PowerEdge R740, HP DL380 Gen10, Cisco Catalyst 9300) and we will confirm the exact part number that drops into your hardware.