PTGL04AS220K4N51A0

Resistance - 25°C (Typ):	22 Ohms
Approvals:	UL
Lead Spacing:	0.197" (5.00mm)
Thickness (Max):	--
Height - Seated (Max):	0.551" (14.00mm)
Size / Dimension:	0.177" Dia x 0.138" W (4.50mm x 3.50mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-30°C ~ 85°C
Series:	POSISTOR®, PTGL
Current - Trip (It):	149mA
Current - Hold (Ih) (Max):	112mA
Current - Max:	1A
Voltage - Max:	60V
Type:	Ceramic
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Box (TB)

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Introduction to PTC Resettable Fuses

PTC resettable fuses are electrical components used to protect electrical systems, circuits, and devices from short circuits, overloads, and excessive current. They are a type of protection device used in a variety of applications such as computers, electronic equipment, consumer electronics, medical equipment, home appliances, and industrial machinery.PTC resettable fuses are typically constructed from a non-conductive polymer and are specially designed to react to changes in current. When an overload is detected, the polymer heats up and dissipates its energy in the form of heat. The heat melts the polymer, acting as a barrier to reduce or restrict the flow of electricity. When the electrical current returns to normal, the polymer then cools and realigns, allowing the current to flow again.

Understanding the PTGL04AS220K4N51A0

The PTGL04AS220K4N51A0 is a PTC resettable fuse widely used for protection in a variety of electrical applications. This fuse is a current-limiting type of PTC resettable fuse, meaning that it is designed to reduce the current flowing through the protected circuit in the event of an overload. This fuse is 218.9 mA, with a maximum interrupting current of 3,000 Amps. In addition, this device has a voltage rating of 125 V and is UL, cUL, and TÜV approved.The PTGL04AS220K4N51A0 is a single-element, two-pole device, meaning that it consists of two PTC elements connected in series. This device is activated when the current through the fuse exceeds the trip rating of the device, at which point the fuse will open or “blow”. When the current is reduced to a safe level, the device will reset and allow current to flow again.

Application Field of the PTGL04AS220K4N51A0

The PTGL04AS220K4N51A0 is well-suited for use in a variety of applications. Due to its ability to limit current in the event of an overload, this device is frequently used in circuits that require protection from accidental overloads. This includes consumer electronics, computer power supplies, and other electrical devices. The device is also commonly used in industrial circuits where protection from current overloads is critical.

Working Principle of the PTGL04AS220K4N51A0

When the current passing through the PTGL04AS220K4N51A0 exceeds its rated trip current, the polymer inside the device heats up and begins to melt, forming a barrier that limits or reduces the current flow. This keeps the protected circuit and components from being damaged. When the current returns to a safe level, the polymer cools and realigns, allowing the current to flow again.The PTGL04AS220K4N51A0 is designed to withstand multiple trips and resets without any permanent damage. This is why the device is so widely used in circuits requiring overcurrent protection.

Conclusion

The PTGL04AS220K4N51A0 is a versatile PTC resettable fuse that can be used in a variety of applications. It is a current-limiting type of fuse that offers protection in the event of an overcurrent condition. This device can be used in circuits for consumer electronics, computer power supplies, industrial machinery, and more. The fuse can also withstand multiple trips and resets without any permanent damage.

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