Is there a pin-compatible replacement for 78L05-150?

Several parts like SE8650K1-HF and SE8550K2-HF use the same SOT-89 package, making them potential form-fit replacements. True pin-to-pin compatibility requires verifying the pinout (VIN, GND, VOUT) against the datasheets, as this can vary between manufacturers.

What risks should I check before replacing 78L05-150?

Key risks include: 1) Package mismatch requiring a new PCB layout. 2) Pinout differences causing malfunction. 3) Lower maximum input voltage, which can damage the regulator. 4) Reduced operating temperature range, affecting reliability in harsh environments.

78L05-150 Alternatives, Datasheet & Cross Reference | UMW

The 78L05-150 is a common 5V linear voltage regulator in a SOT-89 package, delivering up to 150mA. Finding a substitute involves matching the package, pinout, and key electrical ratings like input voltage and output current.

AI replacement insight

Package risklow

Low for candidates in SOT-89, but pinout must be checked.

Electrical riskmedium

Some candidates have limited input voltage or temperature ranges.

Firmware risklow

Not applicable for this simple analog component.

Can it be replaced directly?

No direct drop-in replacement is confirmed without datasheet verification of the pinout. SE8650K1-HF is the closest form-fit candidate.

Best replacement path

SE8650K1-HF offers a potential upgrade in the same package, but requires pinout verification.

Main risk

The primary risk is pinout incompatibility even with a matching SOT-89 package. A secondary risk is a lower maximum input voltage or temperature range in some alternatives.

Recommended alternatives

Strong alternative in the same SOT-89 package with higher current and input voltage ratings.

View details

Alternative comparison matrix

Feature / factor	78L05-150	SE8650K1-HF	SE8550K2-HF	HT7350-A	Compatibility / risk
Package	SOT-89	SOT89-3	SOT-89	SOT-89	SOT89-3 / SOT-89 — Package matches target.; SE8550K2-HF: Package matches target.; HT7350-A: Package matches target.
Voltage	~35V (typical)	80V	5.0V	12V	80V / 5.0V / 12V — Significantly higher max input voltage.; SE8550K2-HF: Output voltage matches.; HT7350-A: Critically lower max input voltage.
Current	150mA	200mA	250mA	-	200mA / 250mA — Higher output current provides more margin.; SE8550K2-HF: Higher output current.
Temperature	-20°C to 120°C	-40°C to 105°C	-20°C to 85°C	-	-40°C to 105°C / -20°C to 85°C — Slightly lower max operating temperature.; SE8550K2-HF: Significantly lower max operating temperature.

Application & sourcing insights

Questions & answers

The SE8650K1-HF is a strong candidate, offering the same SOT-89 package and 5V output with higher current (200mA) and input voltage (80V) ratings. However, pinout and temperature range must be verified for your application.