FSR420F и другие
| Компонент | Описание | Производитель | |
| FSR420 | Axial Leaded PTC FSR Series |
DB Lectro Inc |
 |
| FSR420F | STRAP TYPE PPTC FSR Series |
RFE international |
|
| MPSR420 | Polymeric PTC |
MERITEK ELECTRONICS CORPORATION |
|
| SR420 | Ceiling mount |
Lumins Inc. |
|
| SR420C | Ceiling surface mounting |
Lumins Inc. |
|
| SR420CD | Ceiling surface mounting |
Lumins Inc. |
|
| SR420SD | Ceiling surface mounting |
Lumins Inc. |
|