
JSMSEMI
A potential upgrade path with better capacitance and ESD protection in the same package.
Finding a substitute for the SEUC236T5V4U, a 4-line 5V TVS diode in a SOT-23-6L package. This review identifies strong functional alternatives and highlights key parameters to verify for your application.
While the SOT-23-6L package matches, pin assignments for TVS arrays can vary. Verification against datasheets is critical.
Strong candidates exist with matched or better voltage, capacitance, and ESD ratings. Downgrade options carry higher risk.
Candidates are from various manufacturers, offering sourcing flexibility. Check distributor stock and lead times.
Direct replacement for SEUC236T5V4U should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
SRV05-4.TCT-JSM and SRV05-4LA 4A are the most promising alternatives, offering matched or improved electricals. Pinout verification is required.
The primary risks are pinout incompatibility and changes in capacitance, which can affect high-speed signal integrity.

JSMSEMI
A potential upgrade path with better capacitance and ESD protection in the same package.
| Feature / factor | SEUC236T5V4U | SRV05-4.TCT-JSM | SRV05-4LA 4A | USBLC6-4SC6Y | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT-23-6L | SOT-23-6L | SOT23-6L | SOT23-6L | SOT-23-6L / SOT23-6L — Package matches.; SRV05-4LA 4A: Package matches.; USBLC6-4SC6Y: Package matches.; UDT26A05L05UL: Package matches. |
| Number Of Lines | 4 | 4 | 4 | 4 | 4 — Part number implies 4 lines.; SRV05-4LA 4A: Part number implies 4 lines.; USBLC6-4SC6Y: Number of lines matches.; UDT26A05L05UL: Protects four lines. |
| Voltage | 5V | 5V | 5V | 6V (Breakdown) | 5V / 6V (Breakdown) — Working voltage matches.; SRV05-4LA 4A: Working voltage matches.; USBLC6-4SC6Y: Compatible with 5V working voltage.; UDT26A05L05UL: Working voltage matches. |
| Capacitance | 0.6 pF | 0.35 pF | 0.5 pF | 3 pF | 0.35 pF / 0.5 pF / 3 pF / 2.5 pF — Capacitance is lower (better).; SRV05-4LA 4A: Capacitance is slightly better.; USBLC6-4SC6Y: Significantly higher capacitance may affect high-speed signals.; UDT26A05L05UL: Higher capacitance may affect high-speed signals. |
| Esd Protection | 12kV / 17kV | 16kV / 27kV | - | 15kV / 25kV | 16kV / 27kV / 15kV / 25kV / 8kV / 15kV — ESD rating is significantly stronger.; USBLC6-4SC6Y: ESD rating is stronger.; UDT26A05L05UL: ESD contact and air ratings are weaker. |
| Power | 60 W | - | 60 W | - | 60 W — Peak pulse power matches. |
Verified drop-in options for SEUC236T5V4U 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.