LTP300F

Resistance - Initial (Ri) (Min):	15 mOhms
Approvals:	CSA, TUV, UL
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:	PolySwitch®, LTP
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Part Status:	Obsolete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 (or Polyfuses) are thermal protection devices consisting of a polymeric positive temperature coefficient (PPTC) device and a positive temperature coefficient (PTC) element. They are designed to provide a wide range of protection for electrical components and circuits from overload conditions, short circuits, and fire hazards. PTC fuses are designed to act like a switch that opens when the current reaches a certain level. When the current reaches this critical limit, the fuse will open, interrupting the flow of power to the load.The LTP300F is a PTC Resettable Fuse that is used in a wide variety of applications, from automotive, HVAC, and consumer electronics to industrial controls and even aerospace applications. The LTP300F is a lightweight, low-cost, reliable, and highly reliable product that adds a layer of safety and reliability to circuits.The LTP300F has a built-in thermal element that melts a lead wire during an excessive current or overload situation, creating an open circuit. When the current to the device drops below the Class B rating, the lead wire cools and reforms a conductive contact, thus resetting the fuse. The reset time for this product is less than three-hundredths of a second, making it ideal for applications requiring an immediate and reliable power interruption. Additionally, the LTP300F is considered to be one of the most reliable fuses on the market and is rated to last over two-hundred times longer than standard thermal cutoff devices.The LTP300F has several advantages over traditional thermal cutoff devices. The device’s small size allows it to be installed in cramped and confined spaces without the need for additional components or structures. Additionally, the fuse features an internal resistor that provides the appropriate protection from AC/DC transients that can occur in system power lines. This helps to ensure system reliability by protecting the system from faults such as over-current and short-circuits.In addition to its advantages, the LTP300F also has several disadvantages. One of these is that the PTC reset requires a minimum amount of energy to re-engage. This can be an issue for applications requiring rapid resetting of the fuse. Additionally, the PTC’s low breakdown voltage may result in increased energy losses. Finally, the lead wire that melts during an overload condition has a limited cycle life, indicating that the fuse must eventually be replaced.Overall, the LTP300F is a reliable, cost-effective, and high-performance fuse that has many benefits. The compact design and built-in resistor make the product an ideal choice for a wide variety of applications requiring safety, reliability, and cost-effectiveness. The fuse’s resettable feature also ensures safe, repeatable operation for products. Although the PTC reset time and lead wire life may limit the application, the LTP300F offers a reliable and cost-effective solution for a variety of applications.

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