Replacement for J4858CST: Drop-In Alternatives We Stock
Looking for a replacement for the J4858CST (J4858CST - StarTech 1Gbps 1000Base-SX Multi-Mode Fibre 550m 850nm Duplex LC Connector SFP (Mini-GBIC) 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 J4858CST
| SKU | J4858CST |
|---|---|
| Product | J4858CST - StarTech 1Gbps 1000Base-SX Multi-Mode Fibre 550m 850nm Duplex LC Connector SFP (Mini-GBIC) Transceiver Module |
| Current price | $134.74 |
| Stock status | In Stock |
| Detail page | View J4858CST › |
Drop-in replacements for J4858CST
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.
SFPSXMM-B2 - StarTech 1Gbps Multi-mode Fiber 550m 850nm Duplex LC Connector SFP Fiber Optical Transceiver Module
SKU: SFPSXMM-B2
Price: $146.04
SFPSXMM-A1 - StarTech 1.25Gbps 1000Base-SX Multi-Mode Fibre 550m 850nm LC Connector SFP Transceiver Module
SKU: SFPSXMM-A1
Price: $171.33
J4858C-CDW - AddOn HP ProCurve 1Gbps 1000Base-SX Multi-Mode Fibre 550m 850nm Duplex LC Connector SFP (Mini-GBIC) Transceiver Module
SKU: J4858C-CDW
Price: $75.47
57-10000013-01 - Brocade 4Gb/s Fibre Channel Multi-Mode Fiber 550m 850nm Duplex LC Connector SFP Transceiver Module
SKU: 57-10000013-01
Price: $78.00
J4858CC - HP ProCurve X121 1Gbps 1000Base-SX Multi-Mode Fibre 550m 850nm Duplex LC Connector SFP (Mini-GBIC) Transceiver Module
SKU: J4858CC
Price: $78.00
AJ715ANS - HP B-Series 4Gbps Multi-mode Fiber Short Wave Fibre Channel 550m 850nm Duplex LC Connector SFP Transceiver Module
SKU: AJ715ANS
Price: $78.00
AJ715AX - HP B-Series 4Gbps Multi-mode Fiber Short Wave Fibre Channel 550m 850nm Duplex LC Connector SFP Transceiver Module
SKU: AJ715AX
Price: $78.00
AJ715AB - HP B-Series 4Gbps Multi-mode Fiber Short Wave Fibre Channel 550m 850nm Duplex LC Connector SFP Transceiver Module
SKU: AJ715AB
Price: $83.79
FTLF8524E2GNV - Finisar Corporation 4Gb/s 850nm 550m Multi-Mode Fibre Channel Duplex LC Connector SFF Transceiver Module
SKU: FTLF8524E2GNV
Price: $104.62
J4858C-CP - CP 1Gbps 1000Base-SX Multi-Mode Fibre 550m 850nm Duplex LC Connector SFP (Mini-GBIC) Transceiver Module
SKU: J4858C-CP
Price: $116.64
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.