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Best Alternatives to SE8633X2-HF

Package: SOT-89Seaward ElecPMIC - Voltage Regulators - LinearOutput Voltage: 3.3 VInput Voltage (Max): 80 VOutput Current: 200 mAQuiescent Current: 1.8 µAOutput Type: Fixed

SE8633X2-HF is a high-voltage (80V) LDO linear regulator in a SOT-89 package. It provides a fixed 3.3V output at 200mA with an ultra-low quiescent current of 1.8µA, making it ideal for power-sensitive, high-voltage applications.

AI replacement insight

Electrical riskhigh

All candidates have max input voltage <= 35V, versus the target's 80V rating.

Package riskmedium

While SOT-89 candidates exist, the target's pinout is unverified, requiring manual checks.

Firmware risklow

These are simple LDOs with no associated firmware, so there is no risk in this area.

Can it be replaced directly?

Direct replacement for SE8633X2-HF should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

Downgrade to a lower voltage part like SE8533K1-HF (35V max) if the application's actual input voltage allows.

Main risk

The primary risk is electrical overstress due to the much lower input voltage rating of all available alternatives.

Recommended alternatives

2
SE8533K1-HF package
SE8533K1-HF

SEAWARD

Needs validationhigh risk

Functional alternative in SOT-89 package, but with a much lower 35V maximum input voltage and reduced temperature range.

View details

Alternative comparison matrix

Feature / factorSE8633X2-HFSE8533K1-HFHT7333Alt 3Compatibility / risk
PackageSOT-89SOT-89SOT-89SOT-89 — Package matches, but pinout is unverified.; HT7333: Package matches, but pinout is unverified.
Voltage80V35V20V35V / 20V — Candidate input voltage is significantly lower.; HT7333: Candidate input voltage is critically lower.
Current200mA200mA300mA200mA / 300mA — Output current matches.; HT7333: Output current is higher.
Temperature-40°C to 105°C-20°C to 85°C--20°C to 85°C — Candidate has a narrower operating temperature range.
Quiescent Current1.8µA2.5µA1.5µA2.5µA / 1.5µA — Quiescent current is slightly higher.; HT7333: Quiescent current is an excellent match.

Application & sourcing insights

Questions & answers

Verified drop-in options for SE8633X2-HF 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.