Resistance - Initial (Ri) (Min):	120 mOhms
Approvals:	cURus, TUV
Lead Spacing:	0.201" (5.10mm)
Thickness (Max):	--
Height - Seated (Max):	0.718" (18.26mm)
Size / Dimension:	0.483" L x 0.122" W (12.26mm x 3.10mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	300 mOhms
Series:	Multifuse®, MF-RX/72
Time to Trip:	9.6s
Current - Trip (It):	2.7A
Current - Hold (Ih) (Max):	1.35A
Current - Max:	40A
Voltage - Max:	72V
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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MF-RX135/72-2 Application Field and Working Principle

PTC Resettable Fuses are a kind of overcurrent protection devices that are commonly used in a wide range of applications to improve product safety and enhance limit the impacts caused by overcurrent. At present, PTC resettable fuses are mainly used in the overcurrent protection of electronic products such as IT products, consumer electronics, lighting electronics, industrial controls, and automotive electronics. And as the importance of overcurrent protection increasing, the market demand for PTC Resettable Fuses is generally increasing.The MF-RX135/72-2 is typical of the selection of PTC Resettable Fuses. It is a highly reliable, overcurrent protective device with low current consumption and low thermal resistance. With a hold current of 135mA, the MF-RX135/72-2 offers a high-current holding point for reliable protection for a wide range of electronic components and circuits.With regard to the working principle, the MF-RX135/72-2 is based on a constant current design, which means that the current passing through the unit stays constant during the normal operation. When an overcurrent is detected, the current passing through the fuse increases significantly. Then the heat generated by the fuse causes a temperature rise within the device, which then causes the current to drop back to its normal level as the fuse self-resets itself. The self-resetting nature of the MF-RX135/72-2 helps ensure safety and reliability in the system as it prevents the need for manual resetting or replacing the fuse.The robustness of the MF-RX135/72-2 is highlighted by its excellent high voltage performance. It can withstand up to 72 volts, allowing it to be used as a highly reliable protection for a diversity of system and application. In addition, the fuse has excellent electrical characteristics, such as low leakage current and fast trip characteristics, making it suitable for use in a variety of applications.Features of the MF-RX135/72-2 include its high surge current capability, which allows the PTC fuse to handle large current spikes which makes it an excellent choice for protecting against lightning strikes and other electrostatic discharge events. The ultra-low leakage current of the MF-RX135/72-2 is also available, which helps ensure power loss is minimized during normal operation.Due to its excellent features, the MF-RX135/72-2 is widely used in the protection of the power supply system of AC/DC adapters, cell phone chargers, automotive systems, computers and other system power needs. In addition, the MF-RX135/72-2 can be used to protect against Electric Vehicle Supply Equipment (EVSE) and could be used to protect against short circuits in high voltage cables. In both cases, the fast acting response and resettable nature of the PTC fuse reduce the risks of fire and hazardous damage from electrical overcurrent.Overall, the MF-RX135/72-2 is an excellent choice for a wide range of applications, providing reliable and efficient protection against overcurrent. Its high surge current handling capability and extremely low leakage current make it an ideal choice for protecting against lightning strikes and electrical over current. Its wide voltage range and self-resetting capabilities allow it to be used in a variety of environments and applications. As such, the MF-RX135/72-2 is a highly reliable and efficient solution for industries that require reliable and versatile overcurrent protection.

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