15. PPTC Fuse for Speaker Output Protection
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RXEF250
| DigiKey Part No | RXEF250HF-ND |
| Mfr Part No | RXEF250 |
| Manufacturer | Littelfuse Inc. |
PTC RESET FUSE 72V 2.5A RADIAL
Polymeric PTC Resettable Fuse 72V 2.5 A Ih Through Hole Radial, Disc
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✅ Manufacturer: Littelfuse Inc., which satisfies the AVL requirement.
✅ DigiKey category: Circuit Protection → PTC Resettable Fuses, matches the required component category.
✅ Type: Polymeric, matches the requirement.
✅ Current - Hold (Ih): 2.5A, which is within the required 2.0A to 2.5A range and provides the intended margin above the ~1.6A RMS speaker current.
✅ Voltage - Max: 72V, which exceeds the minimum required 16V.
✅ Current - Max: 40A, which exceeds the minimum required 10A for short-circuit fault tolerance.
✅ Mounting Type: Through Hole, matches the requirement.
✅ Operating Temperature: -40°C to +85°C, matches the required range.
✅ RoHS Compliance: ROHS3 Compliant, satisfies the RoHS requirement.
✅ Device function: Resettable polymeric PTC fuse suitable for automatic recovery after overload removal, consistent with speaker output overcurrent protection use.
All required specifications are satisfied. The selected Littelfuse RXEF250 is approved for this application.
✅ DigiKey category: Circuit Protection → PTC Resettable Fuses, matches the required component category.
✅ Type: Polymeric, matches the requirement.
✅ Current - Hold (Ih): 2.5A, which is within the required 2.0A to 2.5A range and provides the intended margin above the ~1.6A RMS speaker current.
✅ Voltage - Max: 72V, which exceeds the minimum required 16V.
✅ Current - Max: 40A, which exceeds the minimum required 10A for short-circuit fault tolerance.
✅ Mounting Type: Through Hole, matches the requirement.
✅ Operating Temperature: -40°C to +85°C, matches the required range.
✅ RoHS Compliance: ROHS3 Compliant, satisfies the RoHS requirement.
✅ Device function: Resettable polymeric PTC fuse suitable for automatic recovery after overload removal, consistent with speaker output overcurrent protection use.
All required specifications are satisfied. The selected Littelfuse RXEF250 is approved for this application.
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