| Part Number | TCF250-120 | TCF250-180 |
|---|---|---|
| Manufacturer | Littelfuse Inc. | Littelfuse Inc. |
| Category | PTC Resettable Fuses | PTC Resettable Fuses |
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| Product Status | Active | Obsolete |
| Type | Polymeric | Polymeric |
| Voltage - Max | 60V (250V Int) | 60V (250V Int) |
| Current - Max | 3 A | 3 A |
| Current - Hold (Ih) (Max) | 120 mA | 180 mA |
| Current - Trip (It) | 240 mA | 380 mA |
| Time to Trip | 900 ms | 3.4 s |
| Resistance - Initial (Ri) (Min) | 5 Ohms | 1.9 Ohms |
| Resistance - Post Trip (R1) (Max) | 14 Ohms | 4.2 Ohms |
| Resistance - 25°C (Typ) | - | - |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Ratings | - | - |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | Nonstandard SMD | Nonstandard SMD |
| Size / Dimension | 0.217" L x 0.217" W (5.50mm x 5.50mm) | 0.276" L x 0.276" W (7.00mm x 7.00mm) |
| Height - Seated (Max) | - | - |
| Thickness (Max) | 0.091" (2.30mm) | 0.063" (1.60mm) |
| Lead Spacing | - | - |