Series:	0ZCF
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Type:	Polymeric
Voltage - Max:	16V
Current - Max:	100A
Current - Hold (Ih) (Max):	2.5A
Current - Trip (It):	5A
Time to Trip:	16s
Resistance - Initial (Ri) (Min):	25 mOhms
Resistance - Post Trip (R1) (Max):	85 mOhms
Operating Temperature:	-40°C ~ 85°C
Ratings:	--
Mounting Type:	Surface Mount
Package / Case:	2920 (7351 Metric), Concave
Size / Dimension:	0.290" L x 0.202" W (7.36mm x 5.12mm)
Height - Seated (Max):	--
Thickness (Max):	0.035" (0.90mm)
Lead Spacing:	--
Approvals:	cURus, TUV

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PTC Resettable Fuses

Introduction

Polymer-based Positive Temperature Coefficient (PTC) resettable fuses, often called simply PTC fuses, are temperature sensitive components which are typically used as overcurrent protection devices in electrical systems. A common example is the 0ZCF0250FF2C, which is a device designed for application in home appliances and intended to provide protection from excess currents.

Construction and Working Principle

The 0ZCF0250FF2C is constructed from a glass-filled polymeric material, forming a single component with a PTC element and two terminals. At normal temperatures, the PTC element has a relatively low resistance, allowing for a current to flow. However, if the current exceeds the rated current rating, the heat generated causes the resistance of the PTC element to increase, creating a high-resistance path that effectively blocks the current flow. This prevents further heat build-up, providing overcurrent protection.When the current has returned to a safe level, the PTC element will return to its low resistance state, allowing current to flow once more. This allows the 0ZCF0250FF2C to be used for repetitive overcurrent protection in applications such as motor drives and power supplies.

Application Fields

The 0ZCF0250FF2C is a versatile device which can be used in many different applications. One of its most common applications is as an overcurrent protection device in power supplies, as its ability to reset itself after the overcurrent event has occured makes it particularly suited for this purpose. Additionally, it can be used in motor drives, where it can provide both overcurrent and overvoltage protection. It also has applications in home appliances, such as washing machines and dishwashers, where it can ensure safe operation and protect from any sudden spikes in current.

Challenges

Although PTC resettable fuses have many advantages, they are not without their challenges. The high resistance state of the device can introduce significant voltage drops which can cause problems in circuits which rely on accurate voltage levels for proper operation. Additionally, if the frequency of overcurrent events is too high, the device can be damaged or fail altogether.

Conclusion

The 0ZCF0250FF2C is a versatile resettable PTC fuse which can be used in a range of applications, particularly in power supplies, motor drives, and home appliances. While it is able to provide protection from overcurrents, it can introduce unwanted voltage drops in circuits, and can be damaged if the frequency of overcurrent events is too high. As such, it should be considered carefully when selecting protection components for your application.

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Part Number	Manufacturer	Price	Quantity	Description