Replacement for ST1PS03AQTR: Drop-In Alternatives We Stock
Looking for a replacement for the ST1PS03AQTR (ST1PS03AQTR - STMicroelectronics Switching Voltage Regulators 400mA nano-quiescent synch step-down converter dig volt sel output discharge)? 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 ST1PS03AQTR
| SKU | ST1PS03AQTR |
|---|---|
| Product | ST1PS03AQTR - STMicroelectronics Switching Voltage Regulators 400mA nano-quiescent synch step-down converter dig volt sel output discharge |
| Stock status | In Stock |
| Detail page | View ST1PS03AQTR › |
Drop-in replacements for ST1PS03AQTR
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.
Maxim MAX17644AATE+ Integrated Switching Voltage Regulators 4.5V to 36V, 2.7A, High-Efficiency, Synchronous Step-Down DC-DC Converter
SKU: MAX17644AATE
Price: $54.53
660184-001 - HP 460-Watts 100-240V AC Common Slot High Efficiency Platinum Plus Hot-Pluggable Switching Power Supply for ProLiant DL380P/DL385 Gen8
SKU: 660184-001
Price: $47.37
656362-B21 - HP 460-Watts 100-240V AC Common Slot High Efficiency Platinum Plus Hot-Pluggable Switching Power Supply for ProLiant DL380P/DL385 Gen8
SKU: 656362-B21
Price: $47.37
643954-101 - HP 460-Watts 100-240V AC Common Slot High Efficiency Platinum Plus Hot-Pluggable Switching Power Supply for ProLiant DL380P/DL385 Gen8
SKU: 643954-101
Price: $47.37
DPS-600PB - HP 575-Watts 100-240V Redundant Hot-Pluggable Switching Power Supply For ProLiant DL380 G4 Server
SKU: DPS-600PB
Price: $50.53
F5XMD - Dell 580-Watts 100-240V Switching Redundant Power Supply for PowerEdge T410
SKU: F5XMD
Price: $50.53
321632-501 - HP 575-Watts 100-240V Redundant Hot-Swappable Switching Power Supply for ProLiant DL380 G4
SKU: 321632-501
Price: $50.53
643954-201 - HP 460-Watts Common Slot High Efficiency Platinum Plus Hot-Pluggable Switching Power Supply For Ml350 G8/ Dl380 G8/ Dl388P G8
SKU: 643954-201
Price: $50.53
643931-001 - HP 460-Watts 100-240V AC Common Slot High Efficiency Platinum Plus Hot-Pluggable Switching Power Supply (RPS) for ProLiant DL380P/DL385 Gen8
SKU: 643931-001
Price: $50.53
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.