Replacement for 877516-B21: Drop-In Alternatives We Stock
Looking for a replacement for the 877516-B21 (877516-B21 - HP 4TB SAS Hard Drive)? 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 877516-B21
| SKU | 877516-B21 |
|---|---|
| Product | 877516-B21 - HP 4TB SAS Hard Drive |
| Stock status | In Stock |
| Detail page | View 877516-B21 › |
Drop-in replacements for 877516-B21
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.
K2R09A - HP External SAS Cable Mini-SAS/Mini-SAS HD for Server 6.56 ft 1 x SFF-8644 Mini-SAS HD 4 x SFF-8088 Mini-SAS Shielding
SKU: K2R09A
Price: $560.25
872289-002 - HP 4TB 7200RPM SAS 12Gb/s 3.5-inch Digitally Signed Hard Drive
SKU: 872289-002
Price: $138.95
MB4000FCWDK HP 4TB 7200RPM SAS 6Gb/s Hot-Pluggable Dual Port 3.5-inch Hard Drive
SKU: MB4000FCWDK
Price: $145.26
839081-001 - HP 4TB 72000RPM SAS 6Gb/s 3.5-inch Hard Drive in Smart Carrier Tray
SKU: 839081-001
Price: $145.26
750795-001 - HP 4TB 7200RPM SAS 6Gb/s 3.5-inch Hard Drive for 3Par StoreServ 7000
SKU: 750795-001
Price: $145.26
713850-S21 - HP 4TB 7200RPM SAS 6Gb/s LFF Dual Port SC 3.5-inch Midline Hard Drive with Tray
SKU: 713850-S21
Price: $145.26
693689-S21 - HP 4TB 7200RPM SAS 6GB/s Hot-Pluggable Dual Port MidLine 3.5-inch Hard Drive
SKU: 693689-S21
Price: $145.26
652755-007 - HP 4TB 7200RPM SAS 6GB/s Hot-Pluggable Dual Port 3.5-inch Hard Drive
SKU: 652755-007
Price: $145.26
695842-001 - HP 4TB 7200RPM SAS 6GB/s Hot-Pluggable MidLine 3.5-inch Hard Drive
SKU: 695842-001
Price: $145.26
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.