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Best Alternatives to K7803-500R3

Package: -YLPTECVoltage Regulators - DC DC Switching RegulatorsOutput Voltage: 3.3 VDCMaximum Output Current: 500 mAInput Voltage Range: 4.75 VDC to 36 VDCNominal Input Voltage: 24 VDCIsolation: Non-isolated

K7803-500R3 is a 3.3V, 500mA non-isolated DC-DC buck converter in a SIP-3 package. This page provides analysis of potential alternatives, focusing on electrical and mechanical compatibility.

AI replacement insight

Electrical risklow

Key parameters like voltage and current have strong matches available.

Package risklow

All candidates use the same standard SIP-3 package.

Firmware risklow

These are non-programmable hardware components.

Can it be replaced directly?

Direct replacement for K7803-500R3 should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

R-78E3.3-0.5 offers identical key electrical parameters and package, making it the strongest candidate. K7803M-1000R3 provides higher current but has a lower input voltage limit.

Main risk

The main risk is ensuring the replacement's input voltage range and pinout are fully compatible with the application. Some alternatives may have different voltage limits or thermal characteristics.

Recommended alternatives

2
R-78E3.3-0.5 package
R-78E3.3-0.5

YLPTEC

Needs validationlow risk

Strong candidate with matching package, voltage, and current ratings. Likely pin-to-pin compatible.

View details

Alternative comparison matrix

Feature / factorK7803-500R3R-78E3.3-0.5K7803M-1000R3Alt 3Compatibility / risk
PackageSIP-3SIP-3SIP-3 (Plugin)SIP-3 / SIP-3 (Plugin) — Identical SIP-3 package.; K7803M-1000R3: Mechanically compatible SIP-3 package.
Voltage4.75V - 36V4.75V - 36V4.5V - 30V4.75V - 36V / 4.5V - 30V — Input voltage range matches.; K7803M-1000R3: Max input voltage is lower. Must verify.
Current0.5A500mA1.0A500mA / 1.0A — Output current matches.; K7803M-1000R3: Higher output current capability.

Application & sourcing insights

Questions & answers

Verified drop-in options for K7803-500R3 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.