RUEF185-2 Circuit Protection

Series:	PolySwitch®, RUEF
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Type:	Polymeric
Voltage - Max:	30V
Current - Max:	100A
Current - Hold (Ih) (Max):	1.85A
Current - Trip (It):	3.7A
Time to Trip:	8.7s
Resistance - Initial (Ri) (Min):	30 mOhms
Resistance - Post Trip (R1) (Max):	90 mOhms
Operating Temperature:	-40°C ~ 85°C
Ratings:	--
Mounting Type:	Through Hole
Package / Case:	Radial, Disc
Size / Dimension:	0.402" Dia x 0.118" W (10.20mm x 3.00mm)
Height - Seated (Max):	0.618" (15.70mm)
Thickness (Max):	--
Lead Spacing:	0.199" (5.05mm)
Approvals:	CQC, CSA, TUV, UL

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Introduction
PTC resettable fuses (fuses for short) provide reliable overcurrent protection by using polymeric material as sensitive components. RUEF185-2 is a relatively new addition to the PTC resettable fuses family, offering a unique combination of features, performance, and durability. This article will explain the application field and working principle of the RUEF185-2 resettable fuse.Application Field
The RUEF185-2 resettable fuse is a suitable choice for many applications, particularly in the telecommunications and electronic markets. It can be used in mobile phones, computers, CD players, portable music players, and other high-current electronic devices. Other applications include industrial equipment, LED lighting, automotive electronics, home appliances, and medical devices. Due to its high performance compared to other similar products, it can also be used in products that require high circuit protection, such as electric circuit boards.Working Principle
The RUEF185-2 resettable fuse is based on a solid-state switching mechanism. When the overcurrent flowing through the fuse exceeds the predetermined rating, the polymeric material inside the fuse rapidly heats up and forms an open circuit, disconnecting the power supply. This prevents any further current from flowing through it, preventing any further damage to the power system.After the excess current has dissipated, the polymeric material cools down and returns to its normal state. This resets the fuse, allowing current to flow again. As the current continues to flow, the polymeric material slowly heats up again, forming an open circuit once more, ready to react to any further current anomalies.Conclusion
The RUEF185-2 resettable fuse is a reliable and cost-effective solution for overcurrent protection. It offers enhanced safety and protection in various electrical and electronic applications, and its solid-state switching action means that it can quickly detect and disconnect any excessive currents. This makes it an ideal choice for a range of high-current applications, such as consumer electronics, automotive electronics, and LED lights.

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Part Number	Manufacturer	Price	Quantity	Description