78M09
Kexin
Needs validationlow risk
A potential pin-compatible alternative with matching voltage and higher current (1.0A) in the same TO-252 package.
Best Alternatives to L78M09CDT-TR
The L78M09CDT-TR is a 9V, 500mA positive voltage regulator in a DPAK package. Finding a suitable replacement involves matching the package, pinout, and key electrical parameters like voltage and current.
AI replacement insight
Package riskmedium
Several candidates have different footprints or mounting types.
Electrical risklow
Most candidates match voltage and offer higher current, which is a safe upgrade.
Can it be replaced directly?
Direct replacement for L78M09CDT-TR should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
The 78M09 from Kexin is the most promising path, offering a compatible package and higher current. However, its pinout must be verified from the datasheet before considering it a drop-in part.
Main risk
The primary risk when substituting the L78M09CDT-TR is mechanical incompatibility. Many alternatives have different packages (TO-220, D²PAK) that require PCB layout changes.
Recommended alternatives
2Alternative comparison matrix
| Feature / factor | L78M09CDT-TR | 78M09 | L7809CD2T-TR | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | DPAK (TO-252) | TO-252 | D²PAK | TO-252 / D²PAK — Package is form-factor compatible (TO-252/DPAK).; L7809CD2T-TR: Larger surface-mount package (D²PAK vs DPAK). | |
| Voltage | 9.0V | 9.0V | 9.0V | 9.0V — Output voltage matches.; L7809CD2T-TR: Output voltage matches. | |
| Current | 0.5A | 1.0A | 1.5A | 1.0A / 1.5A — Higher output current capability.; L7809CD2T-TR: Significantly higher output current capability. | |
| Pinout | Standard 78xx | Unknown | - | Unknown — Pinout is likely compatible but requires datasheet verification. |
Application & sourcing insights
Questions & answers
Verified drop-in options for L78M09CDT-TR 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.