PFNF.012.2 Circuit Protection

Resistance - Initial (Ri) (Min):	1.35 Ohms
Approvals:	cURus, TUV
Lead Spacing:	--
Thickness (Max):	0.043" (1.10mm)
Height - Seated (Max):	--
Size / Dimension:	0.126" L x 0.063" W (3.20mm x 1.60mm)
Package / Case:	1206 (3216 Metric), Concave
Mounting Type:	Surface Mount
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	8.5 Ohms
Series:	PFNF
Time to Trip:	200ms
Current - Trip (It):	290mA
Current - Hold (Ih) (Max):	120mA
Current - Max:	10A
Voltage - Max:	30V
Type:	Polymeric
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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PTC Resettable Fuses are components used in various electrical circuits to protect them from the risk of over-current and short-circuits. PTC Resettable Fuses come in various sizes, depending on the application they are used in. One such resettable fuse is PFNF.012.2. PFNF.012.2 is a disk-shaped resettable fuse, specifically designed for use in automotive wiring systems. It is the preferred type of resettable fuses used in cars and heavy-duty equipment covers. It is rated to protect the automotive circuits from an overload of 12 Watts at 20℃. The fuse has a copper-based construction that makes it highly reliable and durable. Its plastic body and the non-magnetic material used as a cover prevent it from damaging the vehicle, crew, or the electrical system. It is capable of withstanding high over-currents and currents, which is why it is used in the automotive industry. The working principle of PFNF.012.2 is based on the concept of “thermodynamic temperature sensing”. This means that when the current passing through the fuse exceeds its rated value, the thermal disc inside the fuse heats up and melts, thus disconnecting the circuit. Once the specific temperature has been reached, the circuit is automatically re-connected, resetting the fuse and allowing the circuit to remain protected. In order to ensure that the fuse is not damaged beyond repair, the maximum temperature of the thermal disc is kept below the melting point of the plastic body. This ensures that the plastic does not melt, guaranteeing the effective operation and safety of the electrical circuit.The advantage of using PFNF.012.2 lies in the fact that it is a relatively low-cost, reliable, and easy-to-install solution for protecting a variety of automotive circuits. By constantly disconnecting and resetting itself when an overload occurs, the fuse prevents expensive damage, thus saving considerable costs in repairs. The ease of installation is also an added benefit, as the fuse can be installed in place of other fuses, requiring no additional tools or wiring. In conclusion, PFNF.012.2 is a reliable, durable, and low-cost resettable fuse, offering a number of advantages when used in various automotive circuit applications. Thanks to its thermodynamic temperature sensing feature, it can detect and disconnect the circuit when an overload occurs and reconnect it afterwards, resetting itself in the process. The ease of installation and low cost make it an ideal solution for protecting automotive circuits.

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