Replacement for H8521-3-H3C: Drop-In Alternatives We Stock
Looking for a replacement for the H8521-3-H3C (H8521-3-H3C - Finisar Corporation 1.25Gb/s 100m 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 H8521-3-H3C
| SKU | H8521-3-H3C |
|---|---|
| Product | H8521-3-H3C - Finisar Corporation 1.25Gb/s 100m Connector SFP Transceiver Module |
| Current price | $114.59 |
| Stock status | In Stock |
| Detail page | View H8521-3-H3C › |
Drop-in replacements for H8521-3-H3C
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.
FCMJ-8521-3 - Finisar Corporation 1.25Gb/s 1000Base-T 100m Copper Connector SFP mini-GBIC Transceiver Module
SKU: FCMJ-8521-3
Price: $68.42
FCLF-8521-3-HC - Finisar Corporation 1.25Gb/s 1000Base-T Copper 100m RJ-45 Connector SFP Transceiver Module
SKU: FCLF-8521-3-HC
Price: $222.55
FCLF8521P2BTL - Finisar Corporation 1000Base-T 100m Copper SFP Transceiver Module
SKU: FCLF8521P2BTL
Price: $231.58
FTLF8529P3BNV - Finisar Corporation 16Gb/s 850nm 100m SFP+ Optical Transceiver Module
SKU: FTLF8529P3BNV
Price: $401.97
FTLF8519P2BNL - Finisar Corporation 2Gb/s 1000Base-SX 850nm 550m Multi-Mode Duplex LC Connector SFP Transceiver Module
SKU: FTLF8519P2BNL
Price: $47.37
FTRJ8519P1WNL - Finisar Corporation 2Gb/s 1000Base-SX Short Wave 850nm 550m Multi-Mode Duplex LC Connector SFP Transceiver Module
SKU: FTRJ8519P1WNL
Price: $61.84
FTLF1323P1BTR - Finisar Corporation 155Mbps 1310nm 15Km Single-Mode Duplex LC Connector SFP Transceiver Module
SKU: FTLF1323P1BTR
Price: $61.84
FTRJ8524P2BNV - Finisar Corporation 4Gb/s 1000Base-SX 850nm 550m Multi-Mode Duplex LC Connector SFP Transceiver Module
SKU: FTRJ8524P2BNV
Price: $61.84
FTLF8528P3BNV-E5 - Finisar Corporation 8Gb/s 150m 850nm Duplex LC Connector SFP+ Transceiver Module
SKU: FTLF8528P3BNV-E5
Price: $78.00
FTLF8524P2BNV-HD - Finisar Corporation 4Gb/s 1000Base-SX 500m 850nm Duplex LC Connector SFP Transceiver Module
SKU: FTLF8524P2BNV-HD
Price: $84.76
FTLF8529P4BCV-QM - QLogic / Finisar 16Gb/s Multi-mode Fiber 100m 850nm Duplex LC Connector SFP+ Transceiver Module
SKU: FTLF8529P4BCV-QM
Price: $47.37
FCMJ-8520-3 - Finisar 1.25Gbps 1000Base-T Copper 100m RJ-45 Connector SFP Transceiver Module
SKU: FCMJ-8520-3
Price: $134.01
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.