72R065XU

Series:	POLY-FUSE®, 72R
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Type:	Polymeric
Voltage - Max:	72V
Current - Max:	40A
Current - Hold (Ih) (Max):	650mA
Current - Trip (It):	1.3A
Time to Trip:	5.3s
Resistance - Initial (Ri) (Min):	310 mOhms
Resistance - Post Trip (R1) (Max):	720 mOhms
Operating Temperature:	-40°C ~ 85°C
Ratings:	--
Mounting Type:	Through Hole
Package / Case:	Radial, Disc
Size / Dimension:	0.370" Dia x 0.122" W (9.40mm x 3.10mm)
Height - Seated (Max):	0.571" (14.50mm)
Thickness (Max):	--
Lead Spacing:	0.201" (5.10mm)
Approvals:	cURus, TUV

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Introduction

PTC resettable fuses, also known as Polymer Positive Temperature Coefficient (PPTC) fuses, are designed to protect circuits and components from damage due to overcurrent. The main purpose of PTC resettable fuses is to continually monitor electrical current and disconnect the circuit if the current exceeds a predetermined value. The fuses can be "reset" after the overcurrent condition is cleared and the circuit is no longer in danger, thereby allowing the circuit to continue to operate. The 72R065XU is a specific model of PTC resettable fuse that is used in a variety of applications.

72R065XU Applications

The 72R065XU is a radial leaded PTC resettable fuse designed to meet the requirements of customer applications and provide safe, reliable, cost-effective circuit protection. It can be used in a wide range of applications, such as:

• Consumer Electronics: laptop computers, gaming devices, cell phones, tablets, and other consumer electronics.
• Automotive: cars, trucks, motorcycles, and other motor vehicles.
• Industrial: manufacturing, medical, laboratory, and other industrial equipment.
• Stationary Equipment: security systems, commercial lighting systems, and other stationary equipment.

In addition, the 72R065XU can be used in other applications where a cost-effective, resettable fuse solution is desired.

72R065XU Working Principles

The 72R065XU PTC resettable fuse operates on a very simple principle. It utilizes a PTC element consisting of a glass-filled thermoplastic material which increases in resistivity when exposed to an excessive current. The thermoplastic material inside the fuse is able to detect changes in temperature due to the excessive current and, in turn, will cause the fuse to disconnect the circuit. This disconnection mechanism prevents the circuit from becoming damaged due to an excessive current.When the excessive current is removed, the thermoplastic material inside the fuse returns to its normal state and the fuse is able to be reset. The fuse is then able to safely monitor the current again and disconnect the circuit if the current ever exceeds its predetermined threshold.

Conclusion

The 72R065XU is a PTC resettable fuse designed to meet the requirements of a wide range of applications. It works by utilizing a glass-filled thermoplastic material which increases in resistivity when exposed to an excessive current. When the circuit is no longer in danger, the fuse can be reset and is then able to continually monitor electrical current and disconnect the circuit if the current exceeds a predetermined value. This allows the circuit to remain protected from potential damage caused by overcurrent conditions.

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