Is there a pin-compatible replacement for HT7350-A?

Several parts like SE8550K2-HF and ME6239A50PG use the same SOT-89 package, but pin-for-pin compatibility must be confirmed by comparing datasheets as SOT-89 LDO pinouts can vary.

What risks should I check before replacing HT7350-A?

Key risks include pinout mismatch in the SOT-89 package, different dropout voltage affecting low-input operation, and changes in quiescent current or temperature range that could impact system reliability.

HT7350-A Alternatives, Datasheet & Cross Reference | UMW

HT7350-A is a popular 5V, 250mA LDO in a SOT-89 package, valued for its very low quiescent current. Finding a substitute involves matching these key parameters and verifying the pinout.

AI replacement insight

Package riskmedium

While the SOT-89 package is common, the pinout is not standardized and must be checked.

Electrical risklow

Several candidates offer matching or better electrical specs, but parameters like dropout voltage and quiescent current should be reviewed.

Firmware risklow

These are simple LDOs with no firmware or software dependencies.

Can it be replaced directly?

ME6239A50PG is a very close parametric match, often superior. However, pinout must be verified before it can be considered a direct replacement.

Best replacement path

ME6231A50PG offers an upgrade in current and temperature range, providing more design margin.

Main risk

Pinout incompatibility is the main risk. SOT-89 LDOs can have different pin arrangements (e.g., Gnd, Vin, Vout), requiring datasheet verification.

Recommended alternatives

Upgrade path with 500mA output current and wider operating range in a compatible SOT-89-3 package. Pinout verification is essential.

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Alternative comparison matrix

Feature / factor	HT7350-A	ME6231A50PG	ME6239A50PG	SE8550K2-HF	Compatibility / risk
Package	SOT-89	SOT-89-3	SOT89-3	SOT-89	SOT-89-3 / SOT89-3 — SOT-89-3 is typically a direct physical replacement for SOT-89.; ME6239A50PG: SOT89-3 is typically a direct physical replacement for SOT-89.; SE8550K2-HF: Package matches, enabling form-fit consideration.
Pinout	3-pin (assumed)	3-pin	3-pin	3-pin	3-pin — Pinout must be verified from datasheet before use.; ME6239A50PG: Pinout must be verified from datasheet before use.; SE8550K2-HF: Target pinout must be verified from datasheet before use.
Output Current A	0.25	0.5	-	0.25	0.5 / 0.25 — Higher output current provides more design margin.; SE8550K2-HF: matched
Input Voltage V	12.0	18.0	30.0	35.0	18.0 / 30.0 / 35.0 — Candidate supports a wider input voltage range.; ME6239A50PG: Candidate supports a much wider input voltage range.; SE8550K2-HF: Candidate supports a much wider input voltage range.
Temperature	-25°C to 70°C	-40°C to 85°C	-40°C to 85°C	-20°C to 85°C	-40°C to 85°C / -20°C to 85°C — Candidate has a significantly wider operating temperature range.; ME6239A50PG: Candidate has a significantly wider operating temperature range.; SE8550K2-HF: Candidate has a narrower operating range at low temperatures.
Quiescent Current	2 µA	-	1.5 µA	-	1.5 µA — Lower quiescent current is beneficial for battery-powered devices.
Output Voltage V	5.0	-	-	5.0	5.0 — matched

Application & sourcing insights

Questions & answers

ME6231A50PG is a strong upgrade with higher current (500mA) and a wider operating range in a similar SOT-89-3 package. For a closer match, consider ME6239A50PG. Pinout must be verified for all options.