The B59315P1120A62 is a PTC (Positive Temperature Coefficient) thermistor from EPCOS (TDK) designed for overcurrent protection. PTC thermistors are thermally sensitive resistors that exhibit a sharp increase in resistance when their temperature exceeds a certain threshold. This characteristic makes them ideal for use as resettable fuses, limiting current flow in the event of a fault condition.

Applications

• Overcurrent protection in power supplies: Protecting power supplies from damage caused by excessive current draw.
• Short circuit protection in electronic equipment: Preventing damage to sensitive components in the event of a short circuit.
• Overload protection in motors: Protecting motors from overheating due to excessive load.
• Overcharge protection in battery packs: Preventing battery damage from overcharging.
• Telecom equipment protection: Protecting sensitive telecom circuits.

Features

• Resettable overcurrent protection: Automatically resets after the fault condition is removed.
• Fast response time: Quickly limits current flow in the event of an overcurrent.
• Compact size: Allows for easy integration into space-constrained applications.
• Lead-free construction: Compliant with RoHS environmental regulations.
• High reliability: Provides reliable overcurrent protection over a long lifespan.

Benefits

• Improved system reliability: Prevents damage to electronic equipment caused by overcurrents.
• Reduced downtime: Automatically resets after a fault, minimizing downtime.
• Lower maintenance costs: Eliminates the need to replace blown fuses.
• Enhanced safety: Protects users from electrical hazards.
• Environmentally friendly: Lead-free construction.

Additional Details

The B59315P1120A62 has a trip current and hold current specified in its datasheet. The trip current is the current at which the PTC thermistor will switch to its high resistance state, limiting current flow. The hold current is the maximum current that the device can continuously carry without tripping. It is crucial to select a PTC thermistor with appropriate trip and hold current ratings for the specific application. The resistance in the tripped state is significantly higher than its normal operating resistance. The dimensions and lead configuration are also detailed in the datasheet.