PTCCL09H471DBE

Resistance - 25°C (Typ):	2.5 Ohms
Approvals:	UR
Lead Spacing:	0.197" (5.00mm)
Thickness (Max):	--
Height - Seated (Max):	0.532" (13.50mm)
Size / Dimension:	0.335" Dia x 0.157" W (8.50mm x 4.00mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Series:	PTCCL
Current - Trip (It):	705mA
Current - Hold (Ih) (Max):	470mA
Current - Max:	5A
Voltage - Max:	30V
Type:	Ceramic
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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PTC Resettable Fuses

PTC resettable fuses are self-restoring protection devices designed to protect sensitive electronic components from damage caused by over current or over temperature conditions. These devices are commonly used in many of today’s electronic applications, such as home appliances, automotive electronics, consumer electronics, and industrial applications. The use of PTC resettable fuses can increase the reliability and efficiency of today’s electronic systems while significantly reducing the need for costly maintenance and repair. In this article, we’ll take a look at one specific PTC resettable fuse, the PTCCL09H471DBE, and discuss its application field and working principle.

Application Field

The PTCCL09H471DBE is a PTC resettable over-current and over-temperature protection device that is designed to provide reliable protection for power supplies. This fuse is rated for current ranges from 0.1 A to 5 A and provides an accurately controlled trip current independent of the operating voltage. It is ideal for use in a variety of applications, including microprocessor-based systems, computer power supplies, automotive electronics, consumer electronics, and industrial applications.

Working Principle

The PTCCL09H471DBE is designed to protect sensitive electronic components from damage caused by overcurrent or over temperature conditions. It does this by combining the principles of positive temperature coefficient of resistance (PTCR) and exothermic heating. When the fuse is working normally, current flows through the device and is limited by a positive temperature coefficient (PTC) resistor, which raises its resistance with increasing temperature. As the current increases, the temperature of the device begins to rise, further raising the resistance of the resistor. As the resistance reaches a predetermined point, the device will trip, interrupting the current flow and protecting the component.To reset the device, simply remove the power source and allow it to cool down to normal operating temperature. Once the temperature has returned to normal, the device will reset itself and current will again be allowed to flow through the device. This makes the device ideal for applications where resetting is desired, such as computer power supplies and automotive applications.

Conclusion

The PTCCL09H471DBE is a PTC resettable fuse rated between 0.1 and 5 amps and is designed to provide reliable protection in a wide array of applications. It works by combining the principles of PTCR and exothermic heating, allowing it to protect sensitive components from over current or over temperature conditions while providing a reset feature for convenience. It is an ideal choice for use in a variety of applications, including microprocessor-based systems, computer power supplies, automotive electronics, consumer electronics, and industrial applications.

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