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See Product Specifications
| Part Number: | 1812L125PRT | 
| Category: | Circuit Protection | 
| Subcategory: | PTC Resettable Fuses | 
| Manufacturer: | Littelfuse Inc. | 
| Packaging: | Tape & Reel (TR) | 
| Product Status: | Obsolete | 
| Type: | Polymeric | 
| Voltage - Max: | - | 
| Current - Max: | 100 A | 
| Current - Hold (Ih) (Max): | 1.25 A | 
| Current - Trip (It): | 2.5 A | 
| Time to Trip: | 400 ms | 
| Resistance - Initial (Ri) (Min): | 50 mOhms | 
| Resistance - Post Trip (R1) (Max): | 140 mOhms | 
| Resistance - 25°C (Typ): | - | 
| Operating Temperature: | -40°C ~ 85°C | 
| Ratings: | - | 
| Mounting Type: | Surface Mount | 
| Package / Case: | 1812 (4532 Metric), Concave | 
| Size / Dimension: | 0.179" L x 0.128" W (4.55mm x 3.24mm) | 
| Height - Seated (Max): | - | 
| Thickness (Max): | 0.049" (1.25mm) | 
| Lead Spacing: | - |