HVR250P120CF

Series:	POLY-FUSE®, HVR250
Packaging:	Tape & Box (TB)
Lead Free Status / RoHS Status:	--
Part Status:	Obsolete
Moisture Sensitivity Level (MSL):	--
Type:	Polymeric
Voltage - Max:	60V (250V Int)
Current - Max:	3A
Current - Hold (Ih) (Max):	120mA
Current - Trip (It):	240mA
Time to Trip:	1.5s
Resistance - Initial (Ri) (Min):	4 Ohms
Resistance - Post Trip (R1) (Max):	16 Ohms
Operating Temperature:	-40°C ~ 85°C
Ratings:	--
Mounting Type:	Through Hole
Package / Case:	Radial, Disc
Size / Dimension:	0.268" Dia x 0.201" W (6.80mm x 5.10mm)
Height - Seated (Max):	0.492" (12.50mm)
Thickness (Max):	--
Lead Spacing:	0.217" (5.50mm)
Approvals:	cURus, TUV

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PTC Resettable Fuses

PTC (Positive Temperature Coefficient) resettable fuses are a type of fuse that can be reset after a fault has been cleared. This makes them a great choice for applications that require repeatable protection from overcurrent and short-circuit faults, such as automotive applications. The HVR250P120CF is an excellent example of a PTC resettable fuse that is widely used in automotive and other applications.

HVR250P120CF Application Field

The HVR250P120CF is a PTC resettable fuse designed specifically for automotive applications. It is designed to detect a range of current thresholds from 0.5A to 250A, and is able to reset itself after a fault is cleared. This makes it extremely useful for protecting circuits against short-circuits and overcurrents. The HVR250P120CF is also self-recovering and can be used in parallel to other overcurrent protection devices.The HVR250P120CF is typically used in circuits that power electric motors, power windows, and other automotive electronic components. It is also used in non-automotive applications, such as solar power systems and computer power supplies.

HVR250P120CF Working Principle

PTC resettable fuses like the HVR250P120CF work by detecting an increase in current and then switching to an open state until the overcurrent is cleared. This is done by having two elements inside the fuse that react to an increase in current. The first element is a PTC element that is designed to be a high resistance when the current is low, and then increases in resistance when the current increases. The second element is a thermal element that detects the increased resistance due to the PTC element and then opens the fuse until the current drops back to a safe level.Once the current drops to a safe level, the thermal element cools and the connection is reestablished. This makes the HVR250P120CF self-resetting, meaning it can be used in applications where there is risk of intermittent overcurrent.

Conclusion

The HVR250P120CF is an excellent example of a PTC resettable fuse. It is designed specifically for automotive applications and is a great choice for protection against overcurrents and short-circuits. It is self-resetting and can be used in parallel with other protection devices. The HVR250P120CF makes an excellent choice for applications where repeatable protection is required.

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