MF-R700-2

Resistance - Initial (Ri) (Min):	5 mOhms
Approvals:	cURus, TUV
Lead Spacing:	0.402" (10.20mm)
Thickness (Max):	--
Height - Seated (Max):	1.173" (29.80mm)
Size / Dimension:	0.870" L x 0.118" W (22.10mm x 3.00mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	30 mOhms
Series:	Multifuse®, MF-R
Time to Trip:	17.5s
Current - Trip (It):	14A
Current - Hold (Ih) (Max):	7A
Current - Max:	40A
Voltage - Max:	30V
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: Application Field and Working Principle

PTC Resettable Fuses (also known as Polymer Positive Temperature Coefficient, PPTC) are an advancement in the field of electrical circuit protection. They are also called PolySwitch devices, Self-Recovering Fuses, or simply Resettable Fuses. PTC Resettable Fuses are specifically designed to provide overload and short circuit protection on existing and upcoming electronic appliances.The MF-R700-2 Resettable Fuse is one of the most commonly used and most reliable resettable fuses in the market. It offers an extensive range of applications, resulting in a wide variety of options for users and developers. It can be used for high-current, low-voltage applications, such as those in consumer and portable electronic products. Its low profile and high current capability make it ideal for high-density circuit boards. The working principle of the MF-R700-2 is simple yet reliable. It has an active element composed of polymeric material with self-healing properties. In the event of an overload or short circuit, the active element’s temperature rises to a certain level beyond which it can no longer conduct, thus disconnecting the circuit. As soon as the current returns to normal, the element cools down and reestablishes the circuit. This process can be repeated several times without affecting the fuse or the quality of the protected circuit.The MF-R700-2 is also equipped with a single-lead common pin, as it does not require a separate neutral connection. This makes installation easier and faster, especially in tight spaces. It also adds convenience for circuit designers, with its compact design and pre-tinned pins. The MF-R700-2 also offers additional features, such as an automatic reset time-delay, current-limiting, and surge protection. These features provide an extra layer of protection for the protected circuit and components from potentially damaging conditions.Overall, the MF-R700-2 PTC Resettable Fuse is an ideal solution for protecting complex electrical circuits in a range of consumer, portable, and industrial applications. Its combination of simple and reliable operation, compact design, and additional features make it stand out from the competition.

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