YQS8066 Circuit Protection

Resistance - 25°C (Typ):	33 Ohms
Approvals:	--
Lead Spacing:	0.197" (5.00mm)
Thickness (Max):	--
Height - Seated (Max):	0.472" (12.00mm)
Size / Dimension:	0.295" Dia x 0.177" W (7.50mm x 4.50mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	0°C ~ 55°C
Series:	YM
Current - Trip (It):	181mA
Current - Hold (Ih) (Max):	128mA
Current - Max:	900mA
Voltage - Max:	265V
Type:	Ceramic
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

PTC Resettable Fuses

PTC (Positive Temperature Coefficient) Resettable Fuses are temperature-dependent devices which open an electrical circuit when it has received too much electrical energy. YQS8066, a most commonly used resettable fuse, has a wide application field and works with well-defined principles.

Application Field

YQS8066 Resettable Fuses, as a significant part in the network protection, are widely used in computers, communication equipment, medical instruments, consumer electronics, electrical equipment and other electronic fields. It applies to different electronic devices for circuit protection from overload and short-circuit damage. It is also used to protect the components from burning out due to over-current.

Working Principle

YQS8066 Resettable Fuses are made up of polymeric materials, such as polyethlene or polyvinyl chloride, which gradually increase in resistance as the temperature rises. According to the temperature-sensitive characteristic, the YQS8066 Resettable Fuses can automatically interrupt the circuit when the temperature reaches a critical value, determined by the fusion material itself.When a short circuit or over-current occurs, the fuse works as a current limiting element. The current tries to flow through the fuse but the heat generated by the current results in the increase of temperature and hence resistance. The fuses are designed to reach its maximum rated current at a specific temperature. When the current is higher than the rated continuous current, the temperature increase becomes dangerously high, triggering the fuse and open the circuit.

Advantages

One significant advantage of YQS8066 Resettable Fuses is its re-settable features. Typical conventional fuse has to be replaced for resetting. However, this does not apply to PTC Resettable Fuses, as its resistance change with temperature. When the circuit is cooled, its temperature dependent material decreases and the original state of the fuse is re-established.In addition, these fuses have good chemical and mechanical properties. They are resistant to shock and vibration, and they have good corrosion resistance. They provide a fail-safe way of operation. They provide the additional safety and reliability of the circuit, and also prevent from further damage to the components.

Disadvantages

YQS8066 Resettable Fuses have drawbacks that might require further examination. One drawback is its applied temperature. The resettable fuse has to meet specific temperature in order to open the circuit. Over-heating or insufficient heat generation might not trigger the fuse to open. This particularly occurs in low-power applications, such as low wattage lighting switch.The second drawback lies in its re-settable characteristic. Although YQS8066 Resettable Fuses can saved time and cost from replacement, they are still useless when overloaded for a second time in a short period.

Conclusion

The YQS8066 Resettable Fuses have many beneficial properties, such as good temperature resistance and re-settable characteristic. It allows circuit protection from both overload and short-circuit damage, improving the safety and reliability of the system. Its wide application can be seen in many electronic devices, such as electronic equipment, computers and medical instruments. However, it has drawbacks that should not be overlooked, like insufficient heat generation and overheating.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description