Replacement for OPA4991IDYYR: Drop-In Alternatives We Stock
Looking for a replacement for the OPA4991IDYYR (OPA4991IDYYR - Texas Instruments Operational Amplifiers - Op Amps Quad, 40-V, 4.5-MHz, low-power operational amplifier)? 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 OPA4991IDYYR
| SKU | OPA4991IDYYR |
|---|---|
| Product | OPA4991IDYYR - Texas Instruments Operational Amplifiers - Op Amps Quad, 40-V, 4.5-MHz, low-power operational amplifier |
| Stock status | In Stock |
| Detail page | View OPA4991IDYYR › |
Drop-in replacements for OPA4991IDYYR
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.
P4P800 SE - ASUSTeK Desktop Board Pentium 4 (Extreme Edition), Pentium 4, Celeron, Celeron-D Intel 865PE MCH Socket 478 4GB DDR SDRAM 400 MHz, 333 MHz, 266 MHz ATX
SKU: P4P800-SE
Price: $552.63
CT1161312 - Crucial 1GB DDR-400 MHz PC3200 non-ECC Unbuffered CL3 184-Pin DIMM 2.5V Memory Module for Dell Dimension 4550 (533 MHz FSB) Desktop / PC
SKU: CT1161312
Price: $91.93
M386A8K40DM2-CWEZY - Samsung 64GB DDR4-3200 MHz PC4-25600 ECC Registered CL22 288-Pin LRDIMM 1.2V Quad Rank Memory Module
SKU: M386A8K40DM2-CWEZY
Price: $668.46
T5400 - Dell Precision T5400 Intel Xeon E5460 3.16GHz Quad Core CPU 1GBx4 DDR2-667 MHz DIMM 250GB SATA HDD with Nvidia Quadro FX4600 Workstation PC
SKU: T5400
Price: $762.13
0T5400 - Dell Precision T5400 Intel Xeon E5460 3.16GHz Quad Core CPU 1GBx4 DDR2-667 MHz DIMM 250GB SATA HDD with Nvidia Quadro FX4600 Workstation PC
SKU: 0T5400
Price: $762.13
M386A8K40DM2-CVFCO - Samsung 64GB PC4-23466 DDR4-2933 MHz ECC Registered CL21 288-Pin LRDIMM 1.2V Quad Rank x4 Memory Module
SKU: M386A8K40DM2-CVFCO
Price: $823.16
M386A8K40DM2-CVFBY - Samsung 64GB PC4-23466 DDR4-2933 MHz ECC Registered CL21 288-Pin LRDIMM 1.2V Quad Rank x4 Memory Module
SKU: M386A8K40DM2-CVFBY
Price: $854.74
MEM-DR412L-SL01-ER29 - Supermicro 128GB DDR4-2933 MHz PC4-23400 ECC Registered CL21 288-Pin RDIMM 1.2V Quad Rank X4 Memory Module
SKU: MEM-DR412L-SL01-ER29
Price: $1,324.55
4506549R - Gateway 2.40GHz 1066MHz FSB 8MB L2 Cache Socket LGA775 Intel Core 2 Quad Q6600 Quad Core Processor
SKU: 4506549R
Price: $86.38
01G012750300TW - ASUS 2.66GHz 1333MHz FSB 4MB L2 Cache Socket LGA775 Intel Core 2 Quad Q8400 Quad Core Processor
SKU: 01G012750300TW
Price: $95.00
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.