
BNstar
A 1206 PTC fuse with higher voltage rating but a higher hold current (0.5A), offered as a parametric alternative needing review.
SMD1206P025TF is a 1206 PTC resettable fuse with a 0.25A hold current. While form-factor compatible alternatives exist, finding an exact electrical match is challenging, with most options having different current ratings that require engineering review.
Hold current mismatch significantly changes circuit protection characteristics.
All candidates share the same 1206 package, ensuring mechanical compatibility.
No direct, drop-in replacement was identified. All candidates require a review of their electrical parameters, especially the hold current.
Seek a 1206 PTC fuse with a hold current closer to 0.25A. The BNstar SMD1206-050C series is a starting point if a 0.5A hold current is acceptable.
The main risk is using a part with a higher hold current, which will not protect the circuit at the intended 0.25A level.

BNstar
A 1206 PTC fuse with higher voltage rating but a higher hold current (0.5A), offered as a parametric alternative needing review.
| Feature / factor | SMD1206P025TF | SMD1206-050C-24V | SMD1206-050C-30V | SMD1206-075C-30V | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 1206 | 1206 | 1206 | 1206 | 1206 — Form factor matches.; SMD1206-050C-30V: Form factor matches.; SMD1206-075C-30V: Form factor matches. |
| Voltage | 16.0V | 24.0V | 30.0V | 30.0V | 24.0V / 30.0V — Higher voltage rating provides more margin.; SMD1206-050C-30V: Higher voltage rating provides more margin.; SMD1206-075C-30V: Higher voltage rating provides more margin. |
| Current | 0.25A | 0.5A | 0.5A | 0.75A | 0.5A / 0.75A — Hold current is 2x higher, altering protection level.; SMD1206-050C-30V: Hold current is 2x higher, altering protection level.; SMD1206-075C-30V: Hold current is 3x higher, significantly altering protection. |
| Resistance | 2.5Ω | 0.80Ω | 0.70Ω | 0.50Ω | 0.80Ω / 0.70Ω / 0.50Ω — Max resistance is significantly different.; SMD1206-050C-30V: Max resistance is significantly different.; SMD1206-075C-30V: Max resistance is significantly different. |
| Lifecycle | - | - | Active | - | Active — Candidate is listed as Active. |
Parts like BNstar's SMD1206-050C-30V or SMD1206-050C-24V are potential parametric alternatives. They share the 1206 package and have a higher voltage rating, but their 0.5A hold current is double the target's 0.25A, requiring careful design validation.