12 110.2.5
NK Technologies
Needs validationmedium risk
A 1206 slow-blow fuse with a higher voltage rating but a lower 2.5A current rating.
Best Alternatives to S1206-SD-3.0A
SART S1206-SD-3.0A is a 3A, 63V slow-blow fuse in a 1206 package. While no direct replacements are available, several parametric alternatives exist that require careful review of the current rating to ensure proper circuit protection.
AI replacement insight
Electrical riskhigh
Incorrect current rating can lead to circuit damage or malfunction.
Package risklow
All candidates share the same 1206 package, ensuring physical compatibility.
Can it be replaced directly?
No direct, drop-in replacement has been identified. All candidates have different current ratings that require engineering review.
Best replacement path
Use a fuse with a current rating as close to 3.0A as possible, like the 2.5A or 3.5A options, after verifying application needs.
Main risk
The primary risk is using a fuse with an incorrect current rating, which can either fail to protect the circuit (if too high) or cause nuisance tripping (if too low).
Recommended alternatives
5Alternative comparison matrix
| Feature / factor | S1206-SD-3.0A | 12 110.2.5 | 1206T4A63V | S1206-SD-5.0A | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 1206 | 1206 | 1206 | 1206 | 1206 — Form factor matches.; 1206T4A63V: Form factor matches.; S1206-SD-5.0A: Form factor matches.; S1206-SD-6.0A: Form factor matches. |
| Voltage | 63.0V | 72V | 63.0V | 63.0V | 72V / 63.0V — Higher voltage rating provides more margin.; 1206T4A63V: Voltage rating is identical.; S1206-SD-5.0A: Voltage rating is identical.; S1206-SD-6.0A: Voltage rating is identical. |
| Current | 3.0A | 2.5A | 4.0A | 5.0A | 2.5A / 4.0A / 5.0A / 6.0A — Lower current rating provides more protection, may trip early.; 1206T4A63V: Higher current rating provides less protection.; S1206-SD-5.0A: Higher current rating provides less protection.; S1206-SD-6.0A: Significantly higher current rating provides less protection. |
| Fuse Type | Slow Blow | Slow Blow | Slow-Blow | Slow Blow | Slow Blow / Slow-Blow — Time-current characteristic matches.; 1206T4A63V: Time-current characteristic matches.; S1206-SD-5.0A: Time-current characteristic matches.; S1206-SD-6.0A: Time-current characteristic matches. |
Application & sourcing insights
Questions & answers
There is no perfect drop-in replacement found. The closest options are parametric alternatives like the JKSEMI 12 110.2.5 (2.5A) or LANSON 12H1350C (3.5A), but both require careful review of your circuit's current requirements.