2322 661 93124

Time to Trip:	4s
Approvals:	--
Lead Spacing:	0.197" (5.00mm)
Thickness (Max):	--
Height - Seated (Max):	0.453" (11.50mm)
Size / Dimension:	0.335" Dia x 0.197" W (8.50mm x 5.00mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	--
Resistance - 25°C (Typ):	10 Ohms
Series:	--
Current - Trip (It):	270mA
Current - Hold (Ih) (Max):	70mA
Current - Max:	1A
Voltage - Max:	350V
Type:	Ceramic
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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PTC Resettable Fuses: Introduction

PTC resettable fuses, also known as PPTCs (polymeric positive temperature coefficient), are special polymeric devices which act like a standard fuse and often designed to replace them. This type of fuse provides both overcurrent protection for electronics, but also offers the additional advantage of being able to reset after the fault is cleared. Due to their unique characteristics, PTC resettable fuses are becoming increasingly popular in a wide range of applications.

2322 661 93124 Application Field and Working Principle

The 2322 661 93124 is a type of polymeric positive temperature coefficient (PPTC) resetting fuse, It is a two-part device with a sensing element and a control element. It opens quickly under an overcurrent and trips a small amount of current—this is what allows the fuse to reset itself after the fault is cleared.This model is suitable for a wide range of applications, like protecting computers and other electronic equipment from surges and spikes, and also allowing intermittent currents to pass through without tripping. It is also great for circuit protection, temperature cycling, solar power, automotive, and other industrial applications.The fuse works by having a sensing element made of plastic that melts when the current exceeds the fuse\'s rated limit. This opens up contact points, essentially tripping the circuit. PTC resetting fuses then cool down and are able to reset themselves, so that the circuit can remain functional until the current runs too high again.

Advantages

The major advantage of using a PTC resettable fuse over its standard counterpart is its ability to reset itself over time. This avoids the need to replace the component, saving money and installation time. The polymeric material also has a wide range of temperature operating range that suits various applications.Because of its self-resetting mechanism, PTC resettable fuses are increasingly replacing traditional fuses in low-voltage applications. They are as reliable as standard-sized fuses and offer a good degree of protection against both high-voltage surges and low-voltage faults.

Disadvantages

The major disadvantage of using PTC resettable fuses is their lack of current limiting capability. The fuse is designed to open quickly when the current exceeds its rating, but it cannot restrict the amount of current that passes through, which may result in damage to the circuit if not mitigated.Other drawbacks include the fact that they are slightly more expensive than standard fuses, and also their relatively small sizes which can make them difficult to install in some applications.

Conclusion

The 2322 661 93124 PTC resettable fuse is a reliable and cost-effective solution for low-voltage applications. Its ability to reset itself allows it to provide reliable protection against surges and spikes, making it ideal for a range of applications such as computers, temperature cycling, solar power, and automotive.While it is more expensive than traditional fuse and does not have the same current limiting capabilities, its self-resetting mechanism and temperature rating make it an attractive option for many applications.

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