PTGLCSAS1R2K3B51B0 Circuit Protection

Resistance - 25°C (Typ):	1.2 Ohms
Approvals:	--
Lead Spacing:	0.197" (5.00mm)
Thickness (Max):	--
Height - Seated (Max):	0.650" (16.50mm)
Size / Dimension:	0.453" Dia x 0.138" T (11.50mm x 3.50mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-30°C ~ 125°C
Series:	POSISTOR®, PTGL
Current - Trip (It):	996mA
Current - Hold (Ih) (Max):	749mA
Current - Max:	5A
Voltage - Max:	51V
Type:	Ceramic
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	--

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PTC Resettable FusesPTC resettable fuses are a type of protective device that helps to protect circuits and equipment from currents over a specified level. They consist of two components—a metal tab and a PTC element—that are thermally and electrically interconnected and function as a self-resetting switch. This switch will open and disconnect an electrical circuit in response to an excessive current flow beyond the fuse ratings. After a fault is cleared, the switch will reset to its normal position, allowing the circuit to continue functioning normally.PTC resettable fuses are widely used in a variety of applications, including but not limited to automotive, home appliances, consumer electronics, lighting and industrial equipment. They are typically used in low voltage, low power circuits and offer excellent current protection capabilities.Due to its compact design, PTC resettable fuses are often preferred over more traditional thermal fuses. They are usually much smaller than thermal fuses and can be completely integrated into a circuit board layout to ensure efficient thermal management and cost-effectiveness.The working principle of PTC resettable fuses is relatively simple. When a fault occurs and an excessive current passes across the fuse, the PTC element quickly overflows, causing a thermally induced shape change in the element. This shape change causes the metal tab, which is attached to the PTC element, to open the circuit and interrupt the current flow.When the fault is cleared and the PTC element cools down, its shape change switches back to its original position, and the metal tab closes the circuit. This allows the circuit to resume normal operation.The great advantage of PTC resettable fuses is their ability to self-reset without any human intervention. This means that they are far more reliable than thermal fuses, which require manual resetting when they have tripped.The PTC resettable fuse is also known by other names such as resettable polyfuse, polymeric positive temperature coefficient (PPTC), and thermal cutoff switch (TCO). It is designed to protect equipment from both short-term overloads and long-term continuous overcurrent conditions that may cause damage over time.The primary applications of PTC resettable fuses include protection from surges, short circuits, and overvoltages. They are also widely used in personal computers, home appliances, communication devices, medical devices, power supplies, and automotive electronics.In conclusion, PTC resettable fuses are a reliable and cost-effective method of protecting circuits from excessive current. They are much smaller than traditional thermal fuses, and are capable of self-resetting without any manual intervention. These features make them an ideal choice for a wide variety of applications.

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