24LT300U

Resistance - Initial (Ri) (Min):	15 mOhms
Approvals:	cURus, TUV
Lead Spacing:	--
Thickness (Max):	0.043" (1.10mm)
Height - Seated (Max):	--
Size / Dimension:	1.185" L x 0.522" W (30.10mm x 13.25mm)
Package / Case:	Strap
Mounting Type:	User Defined
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	55 mOhms
Series:	POLY-FUSE®, LT
Time to Trip:	4s
Current - Trip (It):	6.3A
Current - Hold (Ih) (Max):	3A
Current - Max:	100A
Voltage - Max:	24V
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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PTC Resettable Fuses

PTC Resettable Fuses (Polymer Positive Temperature Coefficient Resettable Fuses) offer a unique way of protecting circuits from being damaged due to over-currents. These fuses are designed to be reset and reused after each overload event. They are commonly used in power supplies, consumer electronics, lighting, and other electrical applications.The 24LT300U is a PTC Resettable Fuse, rated for 3A operations at 300VDC. It is a surface-mountable component and has a wide operating temperature range of -40°C to +85°C. The 24LT300U is capable of withstanding up to 20 overloads before needing to be replaced.The 24LT300U has a simple but effective structure; it consists of a ceramic body with a metal casing that houses a PTC element enclosed in an epoxy sealant for protection. The PTC element is made of a ceramic bead material of sintered polypropylene and has a built-in over-current sensitivity. This means that when the current flowing through the fuse exceeds the rating of 3A, the PTC element will expand due to the heat generated by the current and will resume its original shape once the overload has been removed. This mechanism serves to limit the current flow over the PTC Resettable Fuse and hence protects the circuit from damage due to over currents.The 24LT300U also has some useful features such as reverse-battery voltage protection and surge current protection. The reverse-battery voltage protection ensures that the PTC Resettable Fuse is not damaged when it is connected in a reverse polarity configuration. The surge current protection feature limits the peak current levels, providing additional protection to the circuit.The 24LT300U can be used in a variety of applications, including consumer electronics, white goods, automotive, renewable energy systems, and other industrial applications where overloads are common. They are especially well-suited for providing protection for LEDs, solenoids, relays, and other devices that may be exposed to high current levels. This makes the 24LT300U an efficient and cost-effective solution for current limiting.In conclusion, the 24LT300U PTC Resettable Fuse is an effective and reliable over-current protection switch. It offers a cost-effective solution to the problem of over-currents and features broad operating temperature ranges, reverse-battery voltage protection, and surge current protection. It is well-suited for a variety of applications, including consumer electronics, white goods, automotive, and renewable energy systems.

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