WPE3V3D3ULA
WPMtek(Wei Pan Microelectronics)
Needs validationlow risk
A strong alternative in the same SOD-323 package with matching voltage, higher power rating, and lower capacitance.
Best Alternatives to LC03CI
Finding a substitute for the Leiditech LC03CI TVS diode involves matching its 3.3V rating, bi-directional polarity, and SOD-323 package. This review identifies potential alternatives and highlights key parametric differences.
AI replacement insight
Electrical riskmedium
Clamping voltage and dynamic resistance can vary between manufacturers and must be verified.
Package risklow
SOD-323 is a standard package, but land pattern compatibility should be double-checked.
Sourcing risklow
Availability of alternatives should be confirmed with distributors.
Can it be replaced directly?
Direct replacement for LC03CI should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
WPE3V3D3ULA is the most promising replacement path, with key parameters aligning well and some being slightly better.
Main risk
The main risk when substituting TVS diodes is using a part with a higher clamping voltage, which reduces the level of protection for the circuit.
Recommended alternatives
2Alternative comparison matrix
| Feature / factor | LC03CI | WPE3V3D3ULA | UDD32C03L01 | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOD-323 | SOD-323 | SOD-323 | SOD-323 — Package matches.; UDD32C03L01: Package matches. | |
| Polarity Or Type | Bi-directional | Bi-directional | - | Bi-directional — Polarity matches. | |
| Voltage V | 3.3V | 3.3V | 3.3V | 3.3V — Reverse stand-off voltage matches.; UDD32C03L01: Reverse stand-off voltage matches. | |
| Power W | 350W | 360W | 350W - 400W | 360W / 350W - 400W — Slightly higher power rating is acceptable.; UDD32C03L01: Power rating is equivalent or better. | |
| Capacitance | 2 pF | 1 pF | 0.6 pF | 1 pF / 0.6 pF — Lower capacitance is generally better for high-speed lines.; UDD32C03L01: Lower capacitance is beneficial. | |
| Clamping Voltage | 5V @ 1A | - | 7V @ 1A | 7V @ 1A — Higher clamping voltage provides weaker protection. |
Application & sourcing insights
Questions & answers
Verified drop-in options for LC03CI 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.