Replacement for 378929-B21-01: Drop-In Alternatives We Stock
Looking for a replacement for the 378929-B21-01 (378929-B21-01 - HP Cisco Ethernet SX Fiber SFP Module)? Pro Disk Network ships HP 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 378929-B21-01
| SKU | 378929-B21-01 |
|---|---|
| Product | 378929-B21-01 - HP Cisco Ethernet SX Fiber SFP Module |
| Current price | $155.95 |
| Stock status | In Stock |
| Detail page | View 378929-B21-01 › |
Drop-in replacements for 378929-B21-01
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.
J9536-61101 - HP Expansion Module - Ethernet, Fast Ethernet, Gigabit Ethernet - 10base-t, 100base-tx, 1000base-t - 20 Ports + 2 X Sfp+
SKU: J9536-61101
Price: $194.74
HPE JL826-61001 FlexNetwork 5140-24G-SFP 24-Ports SFP 8x Dual-Personality Ports 4-Ports SFP+ 10GbE 1x RJ-45 Serial Console Port 2x Power Supply Slots Layer 3 Managed 1U Rack-Mountable Gigabit Ethernet
SKU: JL826-61001
Price: $5,138.95
HPE R8S92-61001 Aruba 6300M 24-Ports 10GBase-X SFP+ 10 Gigabit Ethernet 2-Ports 50GBase-X SFP 2-Ports 25GBase-X SFP Layer 3 Managed 1U Rack-mountable Network Switch
SKU: R8S92-61001
Price: $32,847.37
351596-001 - HP SFP Network Cable SFP for Network Device 6.56 ft SFP SFP
SKU: 351596-001
Price: $71.58
HPE JG898-61001 HP JG898-61001 FlexFabric 5700 Series 5700-32XGT-8XG-2QSFP+ 32 x RJ-45 Ports 10GBase-T + 8 x SFP+ Fixed Fiber Ports + 2 x QSFP+ Ports Layer 3 Managed Rack-mountable Gigabit Ethernet Ne
SKU: JG898-61001
Price: $608.42
HPE JG898-61101 HP JG898-61101 FlexFabric 5700 Series 5700-32XGT-8XG-2QSFP+ 32 x RJ-45 Ports 10GBase-T + 8 x SFP+ Fixed Fiber Ports + 2 x QSFP+ Ports Layer 3 Managed Rack-mountable Gigabit Ethernet Ne
SKU: JG898-61101
Price: $608.42
HP J9148-61301 ProCurve 2910al-48G-PoE+ 44 x Ports PoE+ 10/100/1000Base-T + 4 x Dual Personality SFP (mini-GBIC) Ports + 4 x SFP+ Ports With Optional module Layer 3 Managed Gigabit Ethernet Network Sw
SKU: J9148-61301
Price: $349.47
J9779-61001 - HP 2530-24-PoE+ 24-Ports 10/100 (PoE+) with 2 Gigabit SFP Ports & 2 Ethernet Ports Managed Fast Ethernet Rackmountable Switch
SKU: J9779-61001
Price: $184.21
JG542-61101 - HP 5500-48G-Poe+ 48 x Ports 10/100/1000Base-T + 4 x SFP + 2 x SFP+ Layer-3 Managed Gigabit Ethernet Network Switch
SKU: JG542-61101
Price: $166.32
JG542-61001 - HP 5500-48G-Poe+ 48 x Ports 10/100/1000Base-T + 4 x SFP + 2 x SFP+ Layer-3 Managed Gigabit Ethernet Network Switch
SKU: JG542-61001
Price: $166.32
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.