SSP7903P33PR
SIPROIN
Needs validationmedium risk
Electrically equivalent from the same manufacturer but in a non-compatible SOT89-3L package.
Best Alternatives to SSP7903P33FR
Finding a substitute for the SSP7903P33FR LDO requires careful attention to its 40V maximum input voltage and SOT223 package. While several parts offer the same 3.3V/1A output, most have lower voltage ratings or different packages.
AI replacement insight
Electrical riskhigh
Most alternatives have a significantly lower max input voltage.
Package riskhigh
Some candidates are in non-compatible packages, requiring a board redesign.
Can it be replaced directly?
Direct replacement for SSP7903P33FR should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
SSP7903P33PR is electrically identical but requires a PCB layout change. If the application's input voltage is below 15V, AMS1117-3.3(LX) could be considered after pinout verification.
Main risk
Mismatched maximum input voltage. Using a substitute with a lower Vin max (e.g., 15V or 18V) in a 40V system will cause immediate device failure.
Recommended alternatives
3Alternative comparison matrix
| Feature / factor | SSP7903P33FR | SSP7903P33PR | AMS1117-3.3(LX) | SCJT1117B-3.3-A | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT223 | SOT89-3L | SOT223 | SOT-223 | SOT89-3L / SOT223 / SOT-223 — Package is different and not footprint compatible.; AMS1117-3.3(LX): Package appears to match, but pinout and thermal properties require verification.; SCJT1117B-3.3-A: Package appears to match, but pinout requires verification. |
| Voltage | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V — Output voltage matches.; AMS1117-3.3(LX): Output voltage matches.; SCJT1117B-3.3-A: Output voltage matches. |
| Current | 1.0A | 1.0A | 1.0A | 1.0A | 1.0A — Output current matches.; AMS1117-3.3(LX): Output current matches.; SCJT1117B-3.3-A: Output current matches. |
Application & sourcing insights
Questions & answers
Verified drop-in options for SSP7903P33FR are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.