RLD60P375XF

Series:	POLY-FUSE®, RLD60
Packaging:	Tape & Box (TB)
Lead Free Status / RoHS Status:	--
Part Status:	Obsolete
Moisture Sensitivity Level (MSL):	--
Type:	Polymeric
Voltage - Max:	60V
Current - Max:	40A
Current - Hold (Ih) (Max):	3.75A
Current - Trip (It):	7.5A
Time to Trip:	24s
Resistance - Initial (Ri) (Min):	30 mOhms
Resistance - Post Trip (R1) (Max):	80 mOhms
Operating Temperature:	-40°C ~ 85°C
Ratings:	--
Mounting Type:	Through Hole
Package / Case:	Radial, Disc
Size / Dimension:	1.118" Dia x 0.122" W (28.40mm x 3.10mm)
Height - Seated (Max):	1.319" (33.50mm)
Thickness (Max):	--
Lead Spacing:	0.402" (10.20mm)
Approvals:	cURus, TUV

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PTC Resettable Fuses Application Field and Working PrinciplePTC resettable fuses, also known as polymeric positive temperature coefficient resettable fuses and polymeric positive temperature coefficient current limiters, are electronic components used to protect circuits from abnormal currents and voltage surges, and are applied primarily in automobiles, computers, communications and storage equipment. The RLD60P375XF is a representative of this type of protection device. It is a small, low resistance-type Form C PTC Resettable Fuse. This fuse has some distinct advantages: firstly, it has very low series resistance, which is especially important for applications with small current requirements. Second, its high operating temperature provides it with excellent self-healing characteristics that can rapidly respond to sudden surges in current. Lastly, it can completely reset upon removal of the overcurrent, so no additional resetting is required.In terms of its working principle, the PTC resettable fuse is composed of a resistive polymer that reacts to an increase in temperature. When the temperature rises above a predetermined level, the PTC will increase its resistance and cause a rise in the voltage drop across it. This increase in voltage drop causes the current through it to rapidly fall, thus limiting the excessive current within a certain threshold and protecting the circuit from a surge in current. When the circuit enters a normal state, the PTC’s temperature will drop back below the predetermined level, thus allowing the current to return to its original level. It is important to note that the maximum holding current of the PTC resettable fuse should not be exceeded because it will not recover if the current is too high. Additionally, in order to ensure safe and reliable operation, the PTC resettable fuse must be mounted in the correct orientation and within a suitable heat protection device.Apart from the automotive, computer and communication industries, the RLD60P375XF is also applicable in storage devices such as hard disk drives, portable hard disks and usb flash drives. In these types of applications, the PTC resettable fuse offers better protection against surges and currents due to its high operating temperature. Furthermore, since PTC resettable fuses will self-heal after a surge, they are a better option than traditional fuses which will need to be replaced after each surge.Apart from these industries, PTC resettable fuses are also widely used in consumer electronics, including power supplies, set-top boxes, cameras, and battery powered devices. The resettable feature of the PTC ensures that any device will be able to operate back to its normal condition after a surge event. In conclusion, despite the fact that PTC resettable fuses are relatively simple components, they are an important component of several electronic systems. The RLD60P375XF, in particular, offers low resistance, excellent self-healing capabilities, and a wide range of applications. Therefore, it is an ideal choice for protecting circuits from sudden power surges and other abnormal current and voltage changes.

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