PTCTZ3MR100KTE Circuit Protection

Series:	PTCTZ
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Type:	Ceramic
Voltage - Max:	245V
Current - Max:	165mA
Current - Trip (It):	270mA
Time to Trip:	3s
Resistance - 25°C (Typ):	10 Ohms
Operating Temperature:	--
Ratings:	--
Mounting Type:	Surface Mount
Package / Case:	2-SMD
Size / Dimension:	0.394" L x 0.283" W (10.00mm x 7.20mm)
Height - Seated (Max):	0.142" (3.60mm)
Thickness (Max):	--
Lead Spacing:	--
Approvals:	--

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PTC Resettable Fuses

PTC resettable fuses are a type of fuses used to protect electrical and electronic circuits from overloads or short circuits. They are made of a conductive polymer material with a positive temperature coefficient, which is capable of automatically resetting when the load is removed. The PTC resettable fuse series from Littelfuse, PTCTZ3MR100KTE, is a dimensionally and electrically compatible replacement for the competitive PTC resettable fuse series.

Application Field of PTCTZ3MR100KTE

PTCTZ3MR100KTE fuses are suitable for automotive, industrial, and consumer electronics applications. Specifically, these fuses are designed for automotive audio amplifiers, back-up camera and parking sensor systems, HVACs, networking equipment, large motors, batteries, dishwashers, ovens, and more. Additionally, they are compatible with on-board diagnostics (OBD) for fast fault detection and reset.

Features and Benefits of PTCTZ3MR100KTE

PTCTZ3MR100KTE fuses provide several key features and benefits that make them a superior choice in terms of safety, reliability, and cost effectiveness.• Quick resettability: PTCTZ3MR100KTE fuses offer a fast resettable mechanism, which is designed to protect communities of electronic components and reduce the potential for any damage caused by an overload or short circuit. This also helps with meeting EMC requirements.• High current endurance: These fuses are durable enough to handle high levels of current without overheating or breaking.• Visible fuse failure: Certain illumination features such as LED or neon indicate whether the fuse has opened or not. This provides greater safety in critical applications and helps in identifying the cause of an electrical failure.• Low resistance/temperature protection: PTCTZ3MR100KTE fuses are designed to work under low-resistance/high-temperature conditions and provide protection against any overload or short-circuit situation.• UL Recognition: PTCTZ3MR100KTE fuses have met UL requirements for use in temperature, over-current and short-circuit protection applications (UL, DQWZ3, File E146786).• Cost-effectiveness: The PTCTZ3MR100KTE fuses offer cost-effectiveness across multiple applications due to their modest in-rush currents.

Working Principle of PTCTZ3MR100KTE

A PTC resettable fuse contains a conductive polymer material with a positive temperature coefficient. This polymeric material is between two electrodes and has a high-resistance state as long as the current passing through it remains below a certain threshold.Once an overload or short circuit occurs, the current passing through the fuse increases, causing the resistance to decrease accordingly. The decrease in resistance causes a rapid increase in temperature, which is detected by the fuse’s temperature sensing element. The temperature sensing element then acts like a switch and trips to interrupt the circuit, preventing further damage.Once the excess current has been removed, the temperature of the polymer material within the fuse cools down and returns to its initial state. This allows the switch to reset automatically, restoring functionality and readiness for the next fault detection.

Conclusion

The PTCTZ3MR100KTE PTC resettable fuses from Littelfuse provides superior protection against overloads and short circuits in a wide variety of automotive, industrial, and consumer electronics applications. They offer several key features including quick resettability, high current endurance, visible fuse failure, low resistance/temperature protection, UL Recognition, and cost-effectiveness. The fuse utilizes a conductive polymer material with a positive temperature coefficient, which is capable of automatically resetting when the load is removed, making it a reliable and cost-effective solution for many applications.

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