RXEF375K-0.144

Resistance - Initial (Ri) (Min):	30 mOhms
Approvals:	CQC, CSA, TUV, UL
Lead Spacing:	0.400" (10.15mm)
Thickness (Max):	--
Height - Seated (Max):	1.252" (31.80mm)
Size / Dimension:	1.071" Dia x 0.118" W (27.20mm x 3.00mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	80 mOhms
Series:	PolySwitch®, RXEF
Time to Trip:	24s
Current - Trip (It):	7.5A
Current - Hold (Ih) (Max):	3.75A
Current - Max:	40A
Voltage - Max:	72V
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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PTC Resettable Fuses

PTC resettable fuses, also known as polymeric positive temperature coefficient (PPTC) fuses, are special types of circuit protection devices that can reset themselves after being tripped by an overcurrent condition. Unlike a traditional fuse, which must be replaced after being tripped, PTC fuses can be reused by resetting them after the condition causing the trip has been fixed.The RXEF375K-0.144 is one such PTC device, and it is used to protect against overcurrent conditions in a variety of applications including automotive, consumer, and industrial equipment. The device is a bi-stable device, meaning it can be electrically reset for repeated use. When the current in the device exceeds the threshold value, the device\'s internal electro-thermal element heats up, causing the mechanical spring between the contact elements to expand and open the circuit.When the current is reduced or removed, the temperature of the device reduces and the contact spring relaxes, restoring the device to its initial position and re-connecting the circuit. The RXEF375K-0.144 can be used to protect both large and small circuit elements from overcurrent or short circuit conditions with minimal resistance. The advantages of using PTC resettable fuses over regular fuses include robust protection from low level overcurrent conditions, quick circuit protection without the need to replace the fuse, and they only require a small amount of energy to reset the device. Moreover, there are no sparks, arcing or drastic temperature increase during the protection reaction and resetting process.The usage possibilities of the RXEF375K-0.144 are wide-ranging. For instance, the device can be used in motor control circuits, household appliances, personal safety devices, and more. The device can also be used in medical equipment, telecommunications equipment, lighting, and industrial processes. The device can also be used in power supplies and will work independently from any power source.Finally, it is important to remember that PTC resettable fuses, including the RXEF375K-0.144, are designed to provide localized overcurrent protection, liming the damage that could occur when higher current levels are present. The use of additional overcurrent protection devices is strongly recommended when large faults are possible.

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