Resistance - Initial (Ri) (Min):	1.5 Ohms
Approvals:	cURus, TUV
Lead Spacing:	--
Thickness (Max):	0.077" (1.95mm)
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):	6 Ohms
Series:	POLY-FUSE®, 1812L
Time to Trip:	150ms
Current - Trip (It):	340mA
Current - Hold (Ih) (Max):	140mA
Current - Max:	10A
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: 1812L014DR Application Field and Working Principle

Polymer Positive Temperature Coefficient Resettable Fuses, (PTCRs) are a type of electrical component used to protect systems from dangerous currents. They have become popular in a variety of applications including mobile phones, computers, electric tools, automotive products and more. The 1812L014DR from the Vishay Series is a transient voltage suppressor (TVS) that acts as a PTCR. It can protect against over-voltage and short-circuit conditions, and is designed to reset upon normal conditions. This article will explain the application field and working principle of the 1812L014DR PTCR.The 1812L014DR PTCR from the Vishay Series has a peak pulse power rating of 150 Watts, a capacitance of 620 µF and a voltage rating of 14V. It is designed to protect against dangerous surges of current, and it can be used in systems with a wide range of operating voltages. The 1812L014DR PTCR is used in the automotive, consumer electronics, and industrial control markets, as it is designed to provide reliable over-voltage and overload protection. Its small size and low profile make it ideal for use in high-density applications such as mobile phones and portable devices.The working principle of the 1812L014DR PTCR is quite simple. When a surge of current exceeds the rated voltage, a small heater is activated, which melts a small bead of polymer. This interrupts the flow of current, protecting the system from an overload or short-circuit condition. Once the excess current has dissipated, the melting bead cools and re-solidifies, allowing current to flow again.To provide even further protection, the 1812L014DR PTCR features an integrated thermal fuse. This fuse is activated when the temperature of the component exceeds a certain threshold, preventing any further damage to the system. The thermal fuse is reset automatically when the temperature is reduced; however, the component must be replaced if the fuse has been triggered multiple times.In summary, the 1812L014DR PTCR is a versatile and reliable component that can protect against over-voltage spikes and short-circuit conditions. Its small size and low profile make it ideal for high-density applications, and its integrated thermal fuse provides an extra layer of safety. The 1812L014DR component is used widely in the automotive, consumer electronics, and industrial control markets, and it is a popular choice among engineers who need a reliable and cost-effective protection solution.

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