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Best Alternatives to SE8650K1-HF

Package: SOT89-3Seaward ElecLinear Voltage RegulatorsOutput Voltage: 5.0 VInput Voltage Range: 6.0 V to 80 VOutput Current: 200 mAQuiescent Current: 1.8 µAQuiescent Current (Ground Current): 2uA

SE8650K1-HF is a high-voltage (80V) LDO regulator with ultra-low quiescent current in a SOT89-3 package. Finding a direct drop-in replacement is challenging due to its specific high-voltage capability, requiring careful review of all alternatives.

AI replacement insight

Electrical riskhigh

Most pin-compatible alternatives have a much lower maximum input voltage (30-40V vs 80V).

Package riskmedium

An electrically identical part exists in a different package (SOT23-3), requiring a board change.

Can it be replaced directly?

No direct drop-in replacement with the same 80V input rating has been identified. Several parts are pin-compatible but have significantly lower voltage ratings (30V-40V) and are not suitable for high-voltage applications.

Best replacement path

For new designs, SE8650X2-HF offers identical electrical performance in a SOT23-3 package. For existing boards, alternatives like ME6239A50PG are pin-compatible but have a much lower maximum input voltage, requiring careful review.

Main risk

The primary risk is using a substitute with an insufficient maximum input voltage rating, which can lead to device failure in applications exceeding 30-40V.

Recommended alternatives

4
SE8650X2-HF package
SE8650X2-HF

SEAWARD

Needs validationmedium risk

Electrically identical alternative in a smaller SOT23-3 package, ideal for new designs.

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Alternative comparison matrix

Feature / factorSE8650K1-HFSE8650X2-HFME6239A50PGSE8550K2-HFCompatibility / risk
PackageSOT89-3SOT23-3SOT89-3SOT-89SOT23-3 / SOT89-3 / SOT-89 / SOT89-3(B) — Different package requires PCB layout change.; ME6239A50PG: Pinout confirmed from datasheet.; SE8550K2-HF: Pinout confirmed from datasheet.; GM7350TB: Pinout confirmed from datasheet. SOT89-3(B) is likely compatible with SOT89-3.
Voltage80V80V30V35V80V / 30V / 35V / 40V — Max input voltage matches.; ME6239A50PG: Candidate has a significantly lower max input voltage.; SE8550K2-HF: Candidate has a significantly lower max input voltage.; GM7350TB: Candidate has a significantly lower max input voltage.
Current200mA200mA250mA250mA200mA / 250mA — Output current matches.; ME6239A50PG: Higher output current provides more margin.; SE8550K2-HF: Higher output current provides more margin.; GM7350TB: Output current matches.
Quiescent Current1.8µA1.8µA1.5µA2.5µA1.8µA / 1.5µA / 2.5µA / 5.0µA — Quiescent current matches.; ME6239A50PG: Quiescent current is slightly better than target.; SE8550K2-HF: Quiescent current is slightly higher.; GM7350TB: Quiescent current is higher than target.

Application & sourcing insights

Questions & answers

The best functional alternative is SE8650X2-HF, which has identical electrical specs but comes in a different SOT23-3 package. For a pin-compatible option, ME6239A50PG is available but its max input voltage is only 30V, far below the original's 80V.