72R020XPR

Resistance - Initial (Ri) (Min):	1.83 Ohms
Approvals:	cURus, TUV
Lead Spacing:	0.201" (5.10mm)
Thickness (Max):	--
Height - Seated (Max):	0.461" (11.70mm)
Size / Dimension:	0.291" Dia x 0.122" W (7.40mm x 3.10mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	4.4 Ohms
Series:	POLY-FUSE®, 72R
Time to Trip:	2.2s
Current - Trip (It):	400mA
Current - Hold (Ih) (Max):	200mA
Current - Max:	40A
Voltage - Max:	72V
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Box (TB)

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PTC Resettable Fuses

PTC resettable fuses are designed to protect circuits and components from excessive current flow. They are used in a wide variety of applications and have been designed to reduce the risk of short circuits and overloads caused by incorrect wiring, faulty electrical components, or damaged power supplies.The 72R020XPR application field and working principle are specifically designed to provide protection against high current flow in the range of 15-21 Amps. The 72R020XPR is a polymeric positive temperature coefficient (PPTC) device. The temperature coefficient of this device is relatively large, meaning that when the power supply circuit exceeds a predetermined current, the 72R020XPR will open the circuit to prevent further current flow.The 72R020XPR fuse is particularly useful in applications that require quick and easy resetting of circuits, such as in the automotive industry. The 72R020XPR will open and lock-out the circuit when the current exceeds its threshold, and then can be easily reset when the circuit is returned to the normal operating state. This provides tremendous protection against hazardous shorts or overloads which could otherwise damage the components and even catch fire.The 72R020XPR is also designed to have hysteresis, meaning that the fuse will not automatically reset when the current drops below the threshold. This hysteresis allows the fuse to remain open until the cause of the overcurrent is removed, which could be a loose wire or defective component. This additional protection allows for more precise control over the circuit protection, ensuring that the fuse will not reset prematurely and therefore potentially create an unsafe situation.The 72R020XPR is also unique among PTC resettable fuses in that it is a three-lead contact device. This allows the circuit to be easily monitored and reset if necessary. For example, one lead can be used to monitor the current, while the other two can be used to control the reset function. This configuration provides increased flexibility when used in applications such as open loop circuits, where current needs to be monitored and reset with greater accuracy thantraditional two-lead devices allow.The 72R020XPR is designed to be used in both indoor and outdoor applications, providing continuous over-current protection in both environments. The PTC device has been designed to withstand extremes of humidity, temperature, and shock, meaning that it can provide long-term reliability in even the most extreme conditions.Overall, the 72R020XPR is an Al-Cu-Ni-Fe alloy-based PTC fuse which provides efficient, reliable protection from high-level current flow. The fuse is capable of automatically resetting without damage to the circuit, and provides precise control when used with open loop circuits. The three-lead contact design allows for easy circuit monitoring and resetting, while the robust design ensures long-term reliability in a wide range of applications.

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