1SS181
Slkor(SLKORMICRO Elec.)
Needs validationlow risk
A cross-vendor match for 1SS181 with an equivalent voltage rating and higher current capability.
Best Alternatives to 1SS181
The 1SS181 is a popular 80V, 100mA fast-switching diode in a SOT-23 package, used in general-purpose signal switching applications. Finding a suitable replacement involves matching its electrical ratings and package configuration.
AI replacement insight
Electrical risklow
Candidates meet or exceed key ratings. Check dynamic characteristics for sensitive applications.
Package risklow
SOT-23 is a standard package, but pinout must be verified to ensure it's a single diode configuration.
Sourcing risklow
This is a common diode type with multiple manufacturers and alternatives available.
Can it be replaced directly?
Direct replacement for 1SS181 should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
Use 1SS181 from an alternate manufacturer like FUXINSEMI for a direct second-source, or consider 1SS226 for a parametrically identical option.
Main risk
The main risk is selecting a part with a different internal diode configuration (e.g., dual series or common anode) which is common in SOT-23 packages.
Recommended alternatives
2Alternative comparison matrix
| Feature / factor | 1SS181 | 1SS181 | 1SS226 | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT-23 | SOT-23 | SOT-23 | SOT-23 — Package matches.; 1SS226: Package matches. | |
| Voltage | 80.0V | 80.0V | 80.0V | 80.0V — Voltage rating matches.; 1SS226: Rating matches but offers no design margin. | |
| Current | 0.1A | 0.3A | 0.1A | 0.3A / 0.1A — Higher current rating provides more margin.; 1SS226: Rating matches but offers no design margin. | |
| Manufacturer | Slkor(SLKORMICRO Elec.) | FUXINSEMI | - | FUXINSEMI — Alternate manufacturer for the same part number. | |
| Trr | 4 ns | - | 4ns | 4ns — Reverse recovery time matches. |
Application & sourcing insights
Questions & answers
Verified drop-in options for 1SS181 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.