
HTCSEMI
Strong cross-vendor match from HTCSEMI with identical key parameters and package.
The L78L05ABD13TR is an industrial-grade 5V, 100mA linear voltage regulator in an SO-8 package. Finding a substitute requires matching key electricals, package, and especially the wide operating temperature range.
Most candidates have a narrower temperature range (commercial vs. industrial).
Most candidates use SO-8 or compatible SOIC-8 packages, but footprint should be checked.
Alternatives are from major manufacturers like TI and onsemi, improving availability.
Direct replacement for L78L05ABD13TR should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
HT78L05ARZ appears to be the strongest candidate, matching all key electrical parameters, temperature range, and package. Final verification of the pinout is required.
The primary risk across most alternatives is a narrower operating temperature range, which may not be suitable for applications requiring performance below 0°C.

HTCSEMI
Strong cross-vendor match from HTCSEMI with identical key parameters and package.
| Feature / factor | L78L05ABD13TR | HT78L05ARZ | L78L05ACD13TR | UA78L05ACDR | Compatibility / risk |
|---|---|---|---|---|---|
| Temperature | -40°C to 125°C | -40°C to 125°C | 0°C to 125°C | 0°C to 125°C | -40°C to 125°C — Operating temperature range matches.; L78L05ACD13TR: Candidate has a narrower commercial temperature range.; UA78L05ACDR: Candidate has a narrower commercial temperature range.; MC78L05ACDR2G: Candidate has a narrower commercial temperature range. |
| Package | SO-8 | SO-8 | SO-8 | SOIC-8 | SO-8 / SOIC-8 / 8-SOIC — Package matches.; L78L05ACD13TR: Package matches. Pinout is from the same family and likely identical.; UA78L05ACDR: SOIC-8 is likely compatible with SO-8 but requires footprint verification.; MC78L05ACDR2G: 8-SOIC is likely compatible with SO-8 but requires footprint verification. |
| Voltage | 5V | 5V | 5V | 5V | 5V / 30V — Output voltage matches.; L78L05ACD13TR: Output voltage matches.; UA78L05ACDR: Output voltage matches.; MC78L05ACDR2G: Higher maximum input voltage provides more headroom. |
| Current | 100mA | 100mA | 100mA | 100mA | 100mA — Output current matches.; L78L05ACD13TR: Output current matches.; UA78L05ACDR: Output current matches. |
| Manufacturer | STMicroelectronics | HTCSEMI | - | Texas Instruments | HTCSEMI / Texas Instruments / onsemi — Cross-vendor alternative.; UA78L05ACDR: Cross-vendor alternative.; MC78L05ACDR2G: Cross-vendor alternative. |
Verified drop-in options for L78L05ABD13TR 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.