72R185XMR

Resistance - Initial (Ri) (Min):	80 mOhms
Approvals:	cURus, TUV
Lead Spacing:	0.201" (5.10mm)
Thickness (Max):	--
Height - Seated (Max):	0.906" (23.00mm)
Size / Dimension:	0.660" Dia x 0.122" W (16.76mm x 3.10mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	190 mOhms
Series:	POLY-FUSE®, 72R
Time to Trip:	12.6s
Current - Trip (It):	3.7A
Current - Hold (Ih) (Max):	1.85A
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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The 72R185XMR series of thermally enhanced resettable Polymer Positive Temperature Coefficient (PPTC) fuses, produced by Littelfuse, provide reliable overcurrent protection used in many portable electronic devices, including cellular phones, laptops, and other consumer electronics. The 72R185XMR fuses are an improvement over previous PTC resettable fuses, using advanced materials and technology for improved performance and stability. PPTC fuses are self-resetting current limiting devices that are activated when the circuit current exceeds the fuse’s rating. When this occurs, the internal resistance of the fuse increases as much as ten fold, thereby limiting the current flow and protecting the device from damage. When the overcurrent condition is removed, the internal resistance decreases and the device resets itself, preparing it to react to a future overcurrent situation. This makes the 72R185XMR series of fuses an ideal choice for deployment in overcurrent protection applications. The 72R185XMR series of fuses feature a wide operating temperature range of -40°C to +85°C and are available in ratings ranging from 2A to 5A. They feature a low power loss of 0.7 Watts at 25°C and a wide range of standard overcurrent settings from 10A to 40A.The advanced materials and technology used in the 72R185XMR offer several advantages over other PTC resettable fuses. The complex construction of the device eliminates solder stresses that are associated with other PTC devices, allowing the unit to function reliably over its full temperature range. The 72R185XMR series of fuses produce low internal temperatures, even under high current conditions. This technology is referred to as thermally enhanced, meaning the internal temperature is dissipated more efficiently than traditional PPTC devices. This allows the device to provide reliable and consistent protection in extreme environments, such as in automotive and industrial applications. In addition, the 72R185XMR series features an internal electrostatic discharge (ESD) protection that helps prevent potential malfunction due to electrostatic charges. This helps ensure the device operates correctly and safely. The 72R185XMR series of fuses are recognized for their high quality, high reliability, and tight current ranges. Their small size, low power dissipation, and wide operating temperature range make them an ideal choice for use in many applications. The combination of advanced technology, reliable performance, and cost-effective pricing make the 72R185XMR series of resettable PPTC fuses the perfect solution for many overcurrent protection needs.

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