HVR250P145RAF

Resistance - Initial (Ri) (Min):	3 Ohms
Approvals:	--
Lead Spacing:	0.217" (5.50mm)
Thickness (Max):	--
Height - Seated (Max):	0.394" (10.00mm)
Size / Dimension:	0.268" Dia x 0.201" W (6.80mm x 5.10mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	5.5 Ohms
Series:	POLY-FUSE®, HVR250
Time to Trip:	1s
Current - Trip (It):	290mA
Current - Hold (Ih) (Max):	145mA
Current - Max:	3A
Voltage - Max:	60V (250V Int)
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Box (TB)

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PTC Resettable Fuses

PTC resettable fuses (Polymer Positive Temperature Coefficient fuses) are a type of self-resetting fuse which is used in a wide variety of electronics including uninterruptible power supplies, computer power supplies, battery chargers, and motor control applications.These resettable fuses are semiconductor components that offer surge protection; they act like a normal fuse but can be reset manually or automatically after it trips due to a fault. The use of PTC devices in place of traditional fuses delivers flexibility, cost savings, and improved safety.One example of a PTC fuse is the HVR250P145RAF. This is a 250VA rated PTC thermos-plastic encapsulated fuse, designed for very low power losses and low temperature rise. It has superior safety features, and a low nuisance tripping rate. This PTC fuse is suitable for use in a variety of consumer electronics, including notebook computers, desktop PCs, and home appliances.HVR250P145RAF\'s working principle involves a static property called “Positive Temperature Coefficient” or PTC. This property means that the resistance of the fuse increases when the temperature rises above the threshold temperature. This is usually due to electrical overload or short circuit. When the temperature goes above the threshold temperature, the current flowing through the fuse is interrupted, which serves as a safety feature and trip the PTC fuse.When the fuse is tripped, it must be manually reset or replaced. However, in order to allow the PTC device to reset, it must be allowed to cool down in order for the resistance to return to its original value. Depending on the design of the PTC device, it can reset automatically or manually.The HVR250P145RAF performance and safety characteristics make it ideal for use in a variety of electronic consumer products. Its features include low power losses, low temperature rise, superior safety, and unbeatable price-performance ratio. Its superior safety features, such as low nuisance tripping rate, make the HVR250P145RAF a popular PTC fuse choice for many applications. Many electronics manufacturers use this device for their products, including computers, home appliances, and motor controls.In conclusion, PTC resettable fuses offer an attractive alternative to traditional fuses. The HVR250P145RAF, for example, offers an unbeatable price-performance ratio, superior safety features, and a low nuisance tripping rate. Manufacturers of consumer electronics often use this particular PTC fuse for their products. Thus, the HVR250P145RAF is a useful and popular option for many applications.

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