Resistance - Initial (Ri) (Min):	5 mOhms
Approvals:	cURus, TUV
Lead Spacing:	0.402" (10.20mm)
Thickness (Max):	--
Height - Seated (Max):	1.295" (32.90mm)
Size / Dimension:	0.953" L x 0.118" W (24.20mm x 3.00mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	20 mOhms
Series:	Multifuse®, MF-R
Time to Trip:	20s
Current - Trip (It):	18A
Current - Hold (Ih) (Max):	9A
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

PTC (Positive Temperature Coefficient) Resettable Fuses are a form of electrical protection that can be used in a variety of applications. They provide protection from both over-current conditions and over-heating. They are often used in consumer electronics, as well as automotive and industrial applications.The MF-R900-2 is an example of a resettable fuse. It is a multilayer ceramic PTC with a fast-acting response time. It is capable of resetting multiple times, allowing for repeated over-current/over-heating protection. The MF-R900-2 is a low-cost solution for similar applications that would require additional components for the protection of devices.The MF-R900-2 has a wide range of application fields, including industrial and consumer electronics, telecom systems, building infrastructure, aerospace and automotive. It is used in applications such as short circuit protection, temperature control, surge protection, and fault isolation. It provides a high level of electrical insulation and is RoHS compliant.The MF-R900-2 can be used in various configurations, such as in series and parallel with other devices. It has a rated AC current of 8A with an 85°C temperature rise. It has a resistance range of 0.1-5 nm and a dielectric strength of 750VAC.The working principle of the MF-R900-2 is simple. If the rated current level is exceeded, the PTC element inside the fuse will heat up and drastically increase in resistance. This causes the current to drop, limiting the potential damage to the connected device. Once the current drops below a certain level, the internal PTC element will cool down and return to its low-resistance state. This resetting process eliminates the need to replace the fuse and allows the device to continue to operate, providing the same level of protection.The MF-R900-2 is a cost-effective solution for various applications. Its wide application field and fast resetting time make it an ideal choice for applications that require reliable over-current/over-heating protection.

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