Is there a pin-compatible replacement for LR8341A-M33?

Several parts like TPL820F33-89TR and SE8633K2-HF use the same SOT89-3 package, but a pin-compatible replacement is not guaranteed. You must compare the pinout diagrams in the datasheets to confirm compatibility.

What risks should I check before replacing LR8341A-M33?

The primary risk is pinout mismatch, which can cause circuit failure. Also, check the substitute's dynamic characteristics like PSRR and dropout voltage to ensure they are suitable for your application's noise and power requirements.

LR8341A-M33 Alternatives, Datasheet & Cross Reference | LR

Find functional alternatives for the LR8341A-M33, a 40V, 100mA LDO in a SOT89-3 package. This guide reviews several potential substitutes, highlighting key parametric differences and necessary design checks.

AI replacement insight

Package riskmedium

While the SOT89-3 package matches, the pinout is not verified and is a common point of failure for LDO swaps.

Electrical risklow

The recommended alternatives meet or exceed key electrical ratings like input voltage and output current.

Can it be replaced directly?

No direct drop-in replacement is confirmed. Several functional alternatives exist in the same SOT89-3 package, but require pinout verification from the datasheets before design-in.

Best replacement path

SE8633K2-HF appears to be the strongest parametric upgrade, offering higher voltage and current ratings. However, like all candidates, its pinout must be verified against the target part's datasheet.

Main risk

Pinout incompatibility. SOT89-3 regulators have multiple common pin configurations (e.g., Gnd-Vin-Vout vs. Vin-Gnd-Vout), and a mismatch can damage the circuit.

Recommended alternatives

A strong functional alternative with higher voltage (65V) and current (200mA) in the same package and temp range.

View details

Alternative comparison matrix

Feature / factor	LR8341A-M33	SE8633K2-HF	TPL820F33-89TR	SSP7985P33PR	Compatibility / risk
Package	SOT89-3	SOT89-3	SOT89-3	SOT89-3	SOT89-3 — Package matches.; TPL820F33-89TR: Package matches.; SSP7985P33PR: Package matches.
Pinout	GND, VIN, VOUT	Not verified	Not verified	Not verified	Not verified — Pinout must be verified from datasheet.; TPL820F33-89TR: Pinout must be verified from datasheet.; SSP7985P33PR: Pinout must be verified from datasheet.
Voltage	40V	65V	42V	60V	65V / 42V / 60V — Significantly higher max input voltage.; TPL820F33-89TR: Higher max input voltage.; SSP7985P33PR: Significantly higher max input voltage.
Current	100mA	200mA	180mA	150mA	200mA / 180mA / 150mA — Higher output current capability.; TPL820F33-89TR: Higher output current capability.; SSP7985P33PR: Higher output current capability.
Temperature	-40°C to +105°C	-40°C to +105°C	-40°C to +125°C	Missing	-40°C to +105°C / -40°C to +125°C / Missing — Operating temperature range matches.; TPL820F33-89TR: Wider operating temperature range.; SSP7985P33PR: Operating temperature range not found.

Application & sourcing insights

Questions & answers

The strongest candidate is SE8633K2-HF, which offers higher input voltage (65V) and output current (200mA). However, you must verify its pinout is compatible with your board layout.