MF-R090-2-9

Resistance - Initial (Ri) (Min):	140 mOhms
Approvals:	cURus, TUV
Lead Spacing:	0.201" (5.10mm)
Thickness (Max):	--
Height - Seated (Max):	0.657" (16.70mm)
Size / Dimension:	0.461" L x 0.122" W (11.70mm x 3.10mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	470 mOhms
Series:	Multifuse®, MF-R
Time to Trip:	7.2s
Current - Trip (It):	1.8A
Current - Hold (Ih) (Max):	900mA
Current - Max:	40A
Voltage - Max:	60V
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 devices that provide overcurrent protection in electronic circuits. The operating principle of a PTC fuse is simple and effective; when a circuit is overloaded, the fuse heats up and automatically resets when the circuit cools down. This makes them well-suited for applications that require frequent cycling or multiple circuit overloads.The MF-R090-2-9 is a polymeric PTC resettable fuse designed for use in consumer and industrial electronic circuits. It features a high melting point and fast response time, which makes it ideal for applications with frequent cycling or multiple circuit overloads. The fuse has a low voltage rating of 32V and a current rating of 2A, making it suitable for a variety of devices ranging from low-power entry-level electronics to industrial circuit breakers.The MF-R090-2-9 operates under Ohm’s Law, which states that current is equal to the voltage divided by the resistance of the circuit. When the current flowing through the circuit is higher than the rated current, the PTC fuse will heat up. This causes the resistance of the device to increase, and thus lower the current in the circuit. This will reset the fuse, and the circuit will be ready to be used again.The working principle of the MF-R090-2-9 is based on the concept of thermal stability, which is the ability of the device to maintain its current-carrying state and prevent overheating due to excessive current. Thermal stability is achieved through a combination of materials and construction that allows the heat generated by the circuit to be quickly dispersed. The fuse also features a unique construction which allows the fuse to cycle quickly and reset when the temperature of the circuit has fallen. This makes the MF-R090-2-9 ideal for applications that require frequent or multiple circuit overloads.The MF-R090-2-9 is suitable for a wide variety of applications, including consumer electronics, computer peripherals, communications equipment, medical equipment, and automotive components. It is also suitable for use in industrial equipment such as circuit protection boxes, switchboard distribution systems, and industrial control panels. The fuse is designed for easy installation and is available in a range of sizes to suit different application needs.The PTC resettable fuse technology provides a reliable and cost-effective method of protecting circuits from damage due to improper operation. The MF-R090-2-9 is specifically designed for quick and effective over-current protection in a variety of applications. The device is constructed with high-quality components and is engineered for reliable operation and long-term durability.

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