YQZ120N120 Circuit Protection

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PTC resettable fuses are becoming increasingly popular in recent years. These fuses, sometimes referred to as Polyfuse or Polyswitch, are designed to protect against overcurrents and short circuits in low-voltage, low-power applications. PTC resettables then have the ability to self-restore allowing the product to continue operation once the overcurrent condition has been cleared away.One popular PTC resettable fuse is the YQZ120N120. This fuse is particularly designed for low voltage applications in the range of 1.5V to 24V while also having the capability to be used in up to 100V circuits. It has an internal resistance of 120 ohms with a hold current rating of 110mA and a trip current rating of 165mA. When an overcurrent is applied to the fuse, it will begin to rapidly increase its internal resistance to such a level that the current drops below the trip current. After the overcurrent condition has been cleared, the PTC resettable will self-restore allowing it to perform its role as a protector and return to its low resistance state. The YQZ120N120 has several application fields for low voltage and low current products. It is widely used in 3.7V lithium polymer batteries, computer disk drives, power supply, charger, smart phones, lithium batteries, communication equipment, consumer electronics, automotive electronics, medical equipment, etc. It can be used in circuits where overcurrent protection is needed as it quickly trips and safely prevents further damage to the equipment when an overcurrent condition is met. Furthermore, the YQZ120N120 has a low operating temperature and high temperature coefficient, making it great for high-temperature applications. Additionally, the YQZ120N120 is also rated for surge applications. It has a maximum peak pulse current of 600A and can withstand up to 2V reverse voltage. This makes it ideal for applications that require surge protection, such as power supplies and chargers. Power supplies and chargers often have to cope with voltage surges or dips in order to prevent destruction of the circuit. The YQZ120N120 provides this protection and also a low internal resistance allowing for minimal voltage drops in the circuit.In conclusion, the YQZ120N120 is a reliable PTC resettable fuse designed to protect circuits from overcurrents and short circuits. It is designed for low voltage and low current applications, but is also capable of surge protection with a high peak pulse current rating. It is a great solution for applications where protection is necessary and will self-restore when the overcurrent condition has been cleared away.

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