1812L200/12DR Circuit Protection

Resistance - Initial (Ri) (Min):	20 mOhms
Approvals:	cURus, TUV
Lead Spacing:	--
Thickness (Max):	0.047" (1.20mm)
Height - Seated (Max):	--
Size / Dimension:	0.179" L x 0.128" W (4.55mm x 3.24mm)
Package / Case:	1812 (4532 Metric), Concave
Mounting Type:	Surface Mount
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	70 mOhms
Series:	POLY-FUSE®, 1812L
Time to Trip:	2s
Current - Trip (It):	3.5A
Current - Hold (Ih) (Max):	2A
Current - Max:	100A
Voltage - Max:	12V
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: 1812L200/12DR Application Field and Working Principle

PTC Resettable Fuses, or Poly-fuse devices, are electronic fuses that use phase change materials to provide dynamic protection from electrical overcurrents. The 1812L200/12DR is a PTC Resettable Fuse with a large energy capacity, allowing it to provide reliable overcurrent protection in a wide range of applications. This article will discuss the application field and working principle of this particular product.The 1812L200/12DR is designed for a variety of applications, ranging from industrial, consumer, and automotive electronics. It has a high rated current capacity, allowing it to offer effective protection against a wide range of currents. It is also capable of handling surge currents, making it suitable for use in electric vehicle powertrains. In addition, the 1812L200/12DR offers fast response time and high energy capacity, making it suitable for use in sensitive systems like biomedical devices.The working principle of this product is based on the use of PTC material to provide dynamic overcurrent protection. The PTC material has an antagonistic electrical characteristic, in which the resistance of the material increases as the current flow through it increases. When the current exceeds a certain level, the resistance of the material reaches a switching point, triggering the protective action of the fuse. When the overload is removed, the PTC material cools and the resistance drops to its initial value, resetting the fuse and restoring its protective function.In conclusion, the 1812L200/12DR PTC Resettable Fuse is designed to provide reliable overcurrent protection for a wide range of applications. Its high energy capacity and fast response time makes it suitable for use in sensitive systems. Moreover, the working principle of the product is based on the antagonistic electrical characteristic of PTC materials, allowing the fuse to automatically reset itself after an overload.

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