Is there a pin-compatible replacement for L78M05ABDT-TR?

Yes, the L78M05CDT-TR from STMicroelectronics shares the same DPAK package and pinout. However, it has a wider output voltage tolerance (±4% vs ±2%) and a narrower operating temperature range (0°C minimum vs -40°C), which requires careful review.

What risks should I check before replacing L78M05ABDT-TR?

Key risks include differences in output voltage tolerance, operating temperature range, and maximum output current. Also, verify the package and footprint, as some alternatives like the L7805CV are through-hole, not surface-mount.

L78M05ABDT-TR Alternatives, Datasheet & Cross Reference | STMicroelectronics

The STMicroelectronics L78M05ABDT-TR is a 5V, 0.5A positive linear voltage regulator in a DPAK package, known for its reliability and 2% output voltage tolerance. It is suitable for a wide range of applications requiring a regulated 5V supply.

AI replacement insight

Electrical riskmedium

Many alternatives have wider tolerance or a narrower temperature range.

Package riskhigh

Several functional alternatives require a different PCB footprint or mounting type.

Can it be replaced directly?

No direct drop-in replacement with identical specifications has been identified. The closest options have relaxed tolerance or temperature ratings, or come in different packages.

Best replacement path

For form-factor compatibility, consider L78M05CDT-TR, but verify its relaxed voltage tolerance and temperature range. For an electrical upgrade, L7805ABD2T-TR offers higher current and matching specs but requires a larger D2PAK footprint.

Main risk

The primary risks are mismatched operating temperature ranges and wider output voltage tolerance in same-package alternatives.

Recommended alternatives

Functionally similar part in the same DPAK package but with relaxed voltage tolerance and temperature specifications.

View details

Alternative comparison matrix

Feature / factor	L78M05ABDT-TR	L78M05CDT-TR	L7805CDT-TR	Compatibility / risk
Package	DPAK (TO-252)	DPAK (TO-252)	-	DPAK — Package and pin count match.
Output Voltage V	5.0V	5.0V	-	5.0V — Output voltage is identical.
Output Current A	0.5A	0.5A	-	1.5A — Higher output current capability.
Tolerance	±2% (from 'A' grade)	±4%	-	±4% — Candidate has wider voltage tolerance.
Temperature	-40°C to 125°C	0°C to 150°C	-	0°C to 125°C — Candidate does not meet the -40°C minimum.

Application & sourcing insights

Questions & answers

The L78M05CDT-TR is a close functional match in the same package but has a wider voltage tolerance (4%) and a commercial temperature range. For higher current, L7805CDT-TR offers 1.5A but also has relaxed specs. Always verify specs against your application's needs.