
Leiditech
An upgrade in power, clamping voltage, and capacitance, with a minor leakage current trade-off.
Find suitable replacements for the ESD5B5.0ST1G-N, a 5V bidirectional TVS diode in a SOD-523 package. This guide reviews alternatives, highlighting key parametric differences like power rating, clamping voltage, and capacitance to ensure proper circuit protection.
Candidates have varying power, capacitance, and clamping voltages that must be matched to the application.
All viable candidates use the same SOD-523 package, ensuring form-fit compatibility.
Multiple vendors offer functionally similar parts, providing a good supply chain base.
ESD5Z5CL is a strong candidate for replacement, offering superior protection characteristics in the same package. However, its slightly higher leakage current should be reviewed.
ESD5Z5CL offers an upgrade in protection performance (Ppp, Vc, Cj) with a minor increase in leakage current.
Selecting a part with insufficient power handling (Ppp) or excessive capacitance (Cj) for the application.

Leiditech
An upgrade in power, clamping voltage, and capacitance, with a minor leakage current trade-off.
| Feature / factor | ESD5B5.0ST1G-N | ESD5Z5CL | BNLESD5D5.0CT1G | BSD5C051L | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOD-523 | SOD-523 | SOD-523 | SOD-523 | SOD-523 — Matches target package.; BNLESD5D5.0CT1G: Matches target package.; BSD5C051L: Matches target package. |
| Polarity Or Type | Bidirectional | Bidirectional | - | - | Bidirectional — Matches target polarity. |
| Voltage V | 5.0V | 5.0V | 5.0V | 5.0V | 5.0V — Matches target working voltage.; BNLESD5D5.0CT1G: Matches target working voltage.; BSD5C051L: Matches target working voltage. |
| Power W | 75W | 200W | 120W | Not specified, likely <50W | 200W / 120W / Not specified, likely <50W — Higher power rating provides more robust protection.; BNLESD5D5.0CT1G: Higher power rating.; BSD5C051L: Significantly lower power handling capability. |
| Clamping Voltage | 15V | 9.8V | - | 11V | 9.8V / 11V — Lower clamping voltage offers better protection.; BSD5C051L: Lower clamping voltage offers better protection. |
| Capacitance | 8pF | 0.5pF | 18pF | 2.5pF | 0.5pF / 18pF / 2.5pF — Significantly lower capacitance, better for high-speed lines.; BNLESD5D5.0CT1G: Significantly higher capacitance may impact signal integrity.; BSD5C051L: Lower capacitance is better for signal integrity. |
| Current A | 0.2uA | 1.0uA | - | - | 1.0uA — Higher leakage current, verify application tolerance. |
| Breakdown Voltage | 6.0V | - | 6.2V-9.5V | - | 6.2V-9.5V — Wider and higher breakdown voltage range. |
Verified drop-in options for ESD5B5.0ST1G-N 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.