TRF250-120T-RC-B-0.5

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PTC resettable fuses, also called polymeric positive temperature coefficient (PPTC) devices, are overcurrent protection devices used for protecting electronic circuits from damage caused by overcurrent faults within the system. The TRF250-120T-RC-B-0.5 PTC is a specific type of resettable fuse and is used in a variety of applications. It is important to know the features and workings of the TRF250-120T-RC-B-0.5 in order to determine if it is the correct device for a given application.

The TRF250-120T-RC-B-0.5 is an 8 mm x 3 mm miniature resettable fuse with a 250 watt rating and a peak voltage of 120VAC. It has a 0.5 amp (500 mA) minimum hold current and a 2.2 amp (2.2A) maximum trip current. The device features a glass-filled polyamide housing and radial leads with a Φ 0.025" shoulder and a Φ 0.02" pin. It is approved by UL, CSA, and TUV and is RoHS compliant.

The TRF250-120T-RC-B-0.5 is commonly used in high-end consumer products, such as AC adapters, laptop chargers, and numerous small, portable electronics. It is ideal for protecting circuits from damage due to potential overcurrent faults. For example, it can be used to prevent damage from power surges, incorrect wiring, or faulty power supplies. It is also commonly used in automotive applications, such as in power seats, alarm systems, and audio systems.

The TRF250-120T-RC-B-0.5 incorporates a unique mechanism to prevent thermal and electrical damage caused by overcurrent faults. The device is a self-regulating system with a positive temperature coefficient (PTC) element. When the device is operating correctly, it will remain in a low resistance and conductive state. If an overcurrent fault occurs, the PTC element will become thermally activated, increasing its resistance and limiting the current flow. This will reduce the voltage to the load and dissipate the thermal energy, thus preventing the circuit from damage.

Additionally, the TRF250-120T-RC-B-0.5 is designed to automatically reset after the overcurrent fault is corrected. Once the fault is corrected, the resistance of the PTC element will drop, allowing normal current flow to resume. This makes the TRF250-120T-RC-B-0.5 the ideal protection device for applications where frequent overcurrent events are expected.

In summary, the TRF250-120T-RC-B-0.5 is a miniature resettable fuse with multiple benefits for various applications. The device features an integrated PTC element, which allows it to regulate current flow, protect against overcurrent faults, and reset itself if the fault is corrected. This makes the device ideal for use in consumer and automotive applications where overcurrent events are frequent.

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