The B59890C120A70 is a PTC (Positive Temperature Coefficient) thermistor from TDK Corporation. It is designed for overcurrent and short circuit protection. PTC thermistors are ceramic semiconductor resistors with a positive temperature coefficient. This means that their resistance increases significantly when their temperature exceeds a specific switching temperature. This property makes them useful as self-resetting fuses.

Applications

• Overcurrent protection for power supplies: Protecting power supplies from damage due to excessive current.
• Short circuit protection in electronic devices: Protecting sensitive electronic components from damage caused by short circuits.
• Motor overload protection: Preventing motors from overheating due to excessive load.
• Transformer protection: Protecting transformers from damage due to overload or short circuits.
• Battery protection: Protecting batteries from overcharging and discharging.

Features

• Self-resetting fuse: Automatically resets after the overcurrent condition is removed.
• Fast response time: Quickly limits current flow during an overcurrent event.
• Compact design: Suitable for use in space-constrained applications.
• High reliability: Provides reliable overcurrent protection over a long lifespan.
• Lead-free terminals: Environmentally friendly and compliant with RoHS regulations.

Benefits

• Improved safety: Protects electronic devices and equipment from damage due to overcurrents and short circuits.
• Reduced downtime: Eliminates the need to replace fuses after an overcurrent event.
• Lower maintenance costs: Self-resetting feature reduces maintenance requirements.
• Enhanced system reliability: Provides reliable overcurrent protection.
• Environmentally friendly: Lead-free terminals minimize environmental impact.

Additional Details

The B59890C120A70 is characterized by its switching temperature, rated voltage, and maximum current. The switching temperature is the temperature at which the resistance of the PTC thermistor begins to increase significantly. The rated voltage is the maximum voltage that the PTC thermistor can withstand without damage. The maximum current is the maximum current that the PTC thermistor can carry without tripping. The specific values for these parameters can be found in the product datasheet. Proper selection of a PTC thermistor requires careful consideration of the application requirements and the device's electrical characteristics.