Is there a pin-compatible replacement for HT7133S?

Several parts like RS7533-1YF3 and ME6239A33M3G share the SOT-23-3 package, but pin-for-pin compatibility is not guaranteed without datasheet verification. Users must compare the pinouts before substitution.

What risks should I check before replacing HT7133S?

The main risks are insufficient input voltage rating, pinout mismatch, and different dropout voltage. Ensure any replacement supports at least 30V input and its dropout is acceptable for your circuit.

HT7133S Alternatives, Datasheet & Cross Reference | EVVO

The HT7133S is a low-power 3.3V LDO regulator with a high 30V input tolerance. When seeking alternatives, prioritize matching the input voltage and verifying the pinout.

AI replacement insight

Electrical riskmedium

Key parameters like dropout voltage can differ significantly, impacting circuit performance.

Package risklow

Many alternatives exist in the same SOT-23-3 package, but pinout must be checked.

Sourcing risklow

This is a common LDO type with multiple cross-vendor options available.

Can it be replaced directly?

No drop-in replacement is confirmed without pinout verification. RS7533-1YF3 is a strong functional alternative that requires user validation.

Best replacement path

RS7533-1YF3 appears to be the most robust upgrade path, offering better electrical stress tolerance.

Main risk

The primary risk is using a substitute with a lower maximum input voltage, which can lead to device failure.

Recommended alternatives

A functional alternative with higher input voltage tolerance and output current capability.

View details

Alternative comparison matrix

Feature / factor	HT7133S	RS7533-1YF3	ME6239A33M3G	Compatibility / risk
Package	SOT-23-3	SOT23-3	SOT-23-3	SOT23-3 / SOT-23-3 — Same package type.; ME6239A33M3G: Same package type.
Voltage	30V	36V	30V	36V / 30V — Higher input voltage tolerance.; ME6239A33M3G: Matches max input voltage.
Current	100mA	150mA	250mA	150mA / 250mA — Higher output current capability.; ME6239A33M3G: Higher output current capability.
Temperature	-25°C to 70°C	-40°C to 85°C	-	-40°C to 85°C — Wider operating range.
Pinout	1:GND, 2:VOUT, 3:VIN	Unknown	Unknown	Unknown — Pinout must be verified by user.; ME6239A33M3G: Pinout must be verified by user.
Dropout	100mV	-	380mV @ 100mA	380mV @ 100mA — Significantly higher dropout voltage.

Application & sourcing insights

Questions & answers

RS7533-1YF3 is a strong candidate, offering improved voltage, current, and temperature ratings in the same package. However, pinout compatibility must be verified by the user.