FSMD012-1206-R
FUZETEC
Needs validationlow risk
A potential pin-to-pin replacement from FUZETEC with matching package, voltage, and hold/trip current ratings.
Best Alternatives to RF1343-000
Littelfuse RF1343-000 is a 48V, 0.12A PTC resettable fuse in a 1206 package. When seeking alternatives, focus on matching the hold current, max voltage, and package size for reliable overcurrent protection.
AI replacement insight
Electrical riskmedium
Using a part with a higher hold current (IH) will not protect the circuit at the intended level.
Package risklow
The 1206 package is highly standardized, making physical replacement straightforward.
Can it be replaced directly?
Direct replacement for RF1343-000 should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
The most direct path is to use a PTC fuse with an identical 0.12A hold current, 48V rating, and 1206 package, such as the Fuzetec FSMD012-1206-R.
Main risk
The main risk is selecting a substitute with a higher hold current, which will reduce the level of overcurrent protection for the circuit.
Recommended alternatives
3Alternative comparison matrix
| Feature / factor | RF1343-000 | FSMD012-1206-R | RF1344-000 | nSMD016-48V | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 1206 (3216 Metric) | 1206 | 1206 | 1206 | 1206 — Same standard 1206 package.; RF1344-000: Same standard 1206 package.; nSMD016-48V: Same standard 1206 package. |
| Voltage | 48.0V | 48.0V | 48.0V | 48.0V | 48.0V — Maximum voltage rating matches.; RF1344-000: Maximum voltage rating matches.; nSMD016-48V: Maximum voltage rating matches. |
| Current | 0.39A | 0.39A | 0.16A | 0.16A | 0.39A / 0.16A — Trip current (IT) matches.; RF1344-000: Higher hold current, offers less protection.; nSMD016-48V: Higher hold current, offers less protection. |
| Manufacturer | Littelfuse | FUZETEC | Littelfuse | TECHFUSE | FUZETEC / Littelfuse / TECHFUSE — Cross-vendor alternative.; RF1344-000: Same manufacturer, different series.; nSMD016-48V: Cross-vendor alternative. |
Application & sourcing insights
Questions & answers
Verified drop-in options for RF1343-000 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.