1812L150/24MR

Resistance - Initial (Ri) (Min):	40 mOhms
Approvals:	cURus, TUV
Lead Spacing:	--
Thickness (Max):	0.071" (1.80mm)
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:	AEC-Q200
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	120 mOhms
Series:	POLY-FUSE®, 1812L
Time to Trip:	1.5s
Current - Trip (It):	3A
Current - Hold (Ih) (Max):	1.5A
Current - Max:	20A
Voltage - Max:	24V
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 Resettable Fuses are a type of fuse designed to protect circuits from overloads. They are made of a Resettable Polymeric Positive temperature Coefficient (PPTC) device that trips when a certain current starts flowing through it. The major advantage of Resettable Fuses over ordinary fuses is that they can be reset or replaced, and will continue to protect the circuit even after multiple trips. The 1812L150/24MR is a particularly useful type of PTC Resettable Fuse, with its application fields and working principles below.

Application Field

The 1812L150/24MR is commonly used in consumer electronics, automotive electronics and power supplies around the world. In the consumer electronics world, this type of device is often seen in home computers, laptops, game consoles, digital cameras, and other electronic devices. In the automotive electronics world, it is used in car stereos, DVD players, and GPS systems. The 1812L150/24MR has also become a popular choice in industrial and commercial power supplies due to its reliability and easy installation process.

Working Principle

The 1812L150/24MR works by utilizing a PPTC device placed in series with the circuit. The device is composed of a conductive polymeric material that increases its resistance as the temperature rises. When a certain amount of current is sent through the circuit, the PPTC device heats up, increasing its resistance and thus limiting the current. When the current is limited, the circuit is protected from overloading. Once the current is removed, the device cools down and its resistance decreases, allowing the circuit to resume normal functionality.

Conclusion

PTC Resettable Fuses are designed to provide reliable protection against circuit overloading in a wide range of applications. The 1812L150/24MR is a particularly useful and popular type of fuse, with its application fields spanning consumer electronics, automotive electronics and power supplies. Its working principle is based on the PPTC device placed in series with the circuit, which increases its resistance when a certain current is passed through, and then reduces the resistance when the current is removed.

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