TRF250-184

Resistance - Initial (Ri) (Min):	1.2 Ohms
Approvals:	CSA, TUV, UL
Lead Spacing:	0.197" (5.00mm)
Thickness (Max):	--
Height - Seated (Max):	0.413" (10.50mm)
Size / Dimension:	0.303" Dia x 0.181" W (7.70mm x 4.60mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	0°C ~ 85°C
Resistance - Post Trip (R1) (Max):	3.1 Ohms
Series:	PolySwitch®, TRF250
Time to Trip:	1.3s
Current - Trip (It):	1A
Current - Hold (Ih) (Max):	184mA
Current - Max:	10A
Voltage - Max:	100V (250V Int)
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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PTC Resettable Fuses

PTC (Positive Temperature Coefficient) resettable fuses are an important component in electronic devices, designed to provide reliable overcurrent protection and preventing damage to electronic circuits when a hazardous overcurrent situation occurs. The TRF250-184 is an example of a common resettable fuse used in many applications. The following is a brief overview of its application field and operating principle.

Application Field

The TRF250-184 resettable fuse is a reliable polymeric positive temperature coefficient device and is suitable for protection of electronic circuits against short-circuit and overload conditions. It is ideal for applications such as ac/dc adapters, instrumentation panels,and appliances, among others.The TRF250-184 can be used as an alternative for traditional fuses in order to protect electrical systems from overcurrents. This type of protective device has the advantage of not needing to be replaced after a high overload condition. Instead, once normal operation is restored, the device will reset and be ready for use again.

Working Principle

The TRF250-184 resettable fuse features a polymeric PTC element which increases in resistance when it is subjected to an overcurrent. This increase in resistance causes the current in the circuit to be reduced, thus protecting the elements in the circuit from damage.When the overcurrent situation is resolved, the PTC element will slowly begin to cool down and the resistance will slowly decrease back to its original level. This causes the current to be restored to its normal level, thus allowing the circuit to continue its normal operation.As a preventative measure, it is important to replace the fuse should it have failed or be damaged.

Conclusion

The TRF250-184 PTC resettable fuse is a versatile protective device used in circuits to prevent damage from high current conditions. It can be used as an alternative to traditional fuses for shorter-term overcurrents, and can be reset after an incident. As with any type of fuse, it is important to replace a failed unit to ensure proper protection of the circuit from future problems.

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