MF-PSML350-2 Circuit Protection

Resistance - Initial (Ri) (Min):	3 mOhms
Approvals:	cURus, TUV
Lead Spacing:	--
Thickness (Max):	0.032" (0.80mm)
Height - Seated (Max):	--
Size / Dimension:	0.085" L x 0.053" W (2.15mm x 1.35mm)
Package / Case:	0805 (2012 Metric), Concave
Mounting Type:	Surface Mount
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	25 mOhms
Series:	Multifuse®, MF-PSML
Time to Trip:	5s
Current - Trip (It):	7A
Current - Hold (Ih) (Max):	3.5A
Current - Max:	50A
Voltage - Max:	6V
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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PTC Resettable Fuses: MF-PSML350-2 Application Field and Working Principle

PTC resettable fuses, also known as polymeric PTC (PPTC) resettable fuses, are used for circuit protection in a variety of applications. This is especially true in consumer electronic products which require over-current protection to avoid damage from surges or shorts. The MF-PSML350-2 is one such device, a high-performance, cost-effective resettable fuse from an industry leader. This article will discuss the application field and working principle of the MF-PSML350-2.The MF-PSML350-2 is a polymeric PTC device designed for over-current protection in consumer electronic products. Its application field encompasses a wide variety of products, including power supplies, digital cameras, cell phones, and more. It offers two major advantages over standard fuses: It is able to reset automatically when an overload or short circuit condition occurs, thereby eliminating the need for manual replacement after such events; and it provides a stable level of current protection while also exhibiting minimal variation in time-current characteristics over the range of current values.The working principle of the MF-PSML350-2 is based on the use of a positively temperature coefficient (PTC) device made from a polymeric material. When the current flowing through the device exceeds a specific threshold, the resistance of the element begins to increase rapidly. The R-T (resistance-temperature) curve, which is programmed into the fuse, is based on the characteristics of the selected polymeric material, and determines at what current level the wire will trip. As the current increases, the resistance increases until the current is reduced to a safe level. Once this occurs, the resistance returns to its normal level, thus maintaining an optimal level of protection to the device.The MF-PSML350-2 is an easy-to-use self-resettable fuse which offers excellent value for money and outstanding performance. The device is available in multiple current ratings ranging from 250mA to 5A, with a variety of voltage ratings. Its wide temperature range allows it to be used for both indoor and outdoor applications. Additionally, the fuse provides a high level of accuracy and reliability, due to its low leakage current and low capacitance.Overall, the MF-PSML350-2 is a powerful and reliable solution for over-current protection in consumer electronics applications. Its ability to reset automatically provides convenience and peace of mind, while its stable current characteristics and low operating cost make it a cost-effective choice. Its wide application range and high level of performance make the MF-PSML350-2 an ideal solution for any consumer electronics product that requires over-current protection.

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