YQB120N3.70 Circuit Protection

Series:	YQ
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Type:	Ceramic
Voltage - Max:	80V
Current - Max:	5.5A
Current - Hold (Ih) (Max):	380mA
Current - Trip (It):	750mA
Resistance - 25°C (Typ):	3.7 Ohms
Operating Temperature:	0°C ~ 60°C
Ratings:	--
Mounting Type:	Through Hole
Package / Case:	Radial, Disc
Size / Dimension:	0.532" Dia x 0.157" W (13.50mm x 4.00mm)
Height - Seated (Max):	--
Thickness (Max):	--
Lead Spacing:	0.201" (5.10mm)
Approvals:	--

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PTC Resettable Fuses

PTC Resettable Fuses, often referred to as polyfuses or PPTCs, are a class of electrical devices designed to protect electronic and electrical circuits from short circuits and over currents. They are used in a wide range of applications, from consumer electronics to industrial control systems, where accurate current limitation and circuit protection are required. The YQB120N3.70 is a PTC resettable fuse that is designed to be used in applications that require precise current limitation and protection.

Application Field

YQB120N3.70 PTC Resettable Fuses are designed for use in a wide range of applications. It is commonly used for overcurrent protection in power supplies, AC/DC power converters, lighting systems, motor control systems, uninterruptible power supplies (UPSs), and various other low to medium voltage applications. The YQB120N3.70 is also used in battery management systems, automotive systems, medical systems, and a variety of other applications. Additionally, its low thermal resistance allows it to be used in environments with higher ambient temperatures.

Working Principle

The YQB120N3.70 is a type of electronic component known as a polymeric positive temperature coefficient (PPTC) fuse. It is a self-resetting device that reacts to an overcurrent situation by disconnecting the circuit and limiting any further current flow. It accomplishes this by exhibiting an increase in electrical resistance when the current exceeds its specified threshold. This increase in resistance limits the current flow, protecting the circuit and any connected components. Once the current returns to a safe level, the fuse will reset.The YQB120N3.70 is designed to have a steady reaction time to any overcurrent situation. It is designed to activate when an overcurrent situation is present, allowing it to keep the circuit protected while the overcurrent continues. This also allows the fuse to reset quickly once the overcurrent situation has subsided. In addition to having a fast response time, the YQB120N3.70 also has a low internal resistance. This low internal resistance is the result of its extremely low thermal resistance, allowing it to remain active and ready to protect the circuit even in high temperature environments.

Conclusion

The YQB120N3.70 is a type of PTC Resettable Fuse designed specifically for applications that require precise current limitation and protection. Its unique design and construction makes it ideal for use in a variety of applications, from consumer electronics to industrial control systems. Additionally, its low thermal resistance and fast reset time make it well-suited for use in high temperature environments.

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