1812L160PR

Resistance - Initial (Ri) (Min):	30 mOhms
Approvals:	cURus, TUV
Lead Spacing:	--
Thickness (Max):	0.030" (0.75mm)
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):	100 mOhms
Series:	POLY-FUSE®, 1812L
Time to Trip:	1s
Current - Trip (It):	2.8A
Current - Hold (Ih) (Max):	1.6A
Current - Max:	100A
Voltage - Max:	8V
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, commonly referred to as polyfuse (or polymeric positive temperature coefficient) are used in a wide variety of applications to help protect electronic circuitry from damaging current due to overloading or short-circuiting. The thermal PTC fuse is a voltage-sensitive device that consists of a thin film of polymer sandwiched between two conductive layers. When the current through the PTC reaches a certain level, the resistance of the semiconductor material increases rapidly, resulting in an abrupt interruption of the circuit.The 1812L160PR is one of many available models of the PTC Resettable Fuses. This model is a radial-leaded, surface-mount device designed to protect circuits in automotive, consumer, and general industrial applications. The component consists of a thermistor element encased in a black epoxy, with a resin resistance element connected in series with the element. The recommended operating temperature range is -55°C to +150°C. The fuse has a low resistance of 0.0056 ohms when cold and a maximum resistance of 160 ohms when hot. This fuse is designed with a low trip current of 1.60 A and a short time maximum current rating of 3 A.The 1812L160PR is a self-resetting fuse, meaning it will reset itself once the overcurrent situation is removed. In order for the resetting mechanism to work, two conditions must be met. The first is that the over-current condition must not exceed the resistance rating of the fuse, and the second is that the temperature of the sensing element must be allowed to fall back to a temperature below the resettable trip point. If either of these two conditions is not met, the PTC fuse will remain in an open state.The working principle of the 1812L160PR PTC Resettable Fuse is twofold. The first part is the reaction of the semiconductor material to the current passing through it. When the set threshold current is exceeded, the semiconductor material heats up and its resistance increases rapidly. This limits the current flow, preventing damage to the circuit. The second part of the principle is that when the current is removed, the thermal energy dissipates and the semiconductor material begins to cool, resulting in a decrease in its resistance. This resetting process allows the current to flow through the circuit once again.The 1812L160PR PTC Resettable Fuse is well-suited for applications such as computers, control systems, distributed power systems, telecommunications equipment, consumer electronics, and industrial equipment. It can be used to provide primary over-current protection as well as secondary over-current protection. Its self-resetting capability makes it the ideal choice for those applications where a manual reset is not possible. The 1812L160PR PTC Resettable Fuse offers reliable and cost-effective protection to a wide range of applications.

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