PTCEL17R121NBE

Series:	PTCEL
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
R @ 25°C:	120 Ohms
Tolerance:	--
Current - Steady State Max:	40A
Diameter:	0.670" (17.00mm)
Lead Spacing:	0.197" (5.00mm)
Approvals:	--

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

Introduction to Inrush Current Limiters (ICL)

Inrush current limiters (ICL) are electronic devices that are used to limit the inrush or surge current that often occurs when an electrical circuit is turned on. This type of device is important in preventing damage to both the electrical components and the circuit itself.The main purpose of an ICL is to reduce the voltage and current shock that can occur on the initial start-up of a circuit, by allowing the circuit to slowly ramp up to its appropriate operating voltage. This prevents the sudden explosion of energy that can damage the components of a circuit, as well as reducing the amount of power that needs to be drawn from the mains supply.

Overview of PTCEL17R121NBE Application Field and Working Principle

The PTCEL17R121NBE is an Inrush Current Limiter (ICL) that is suitable for a wide range of applications in both industrial and consumer electronics. It consists of a current-limiting circuit and a heating element which limits the maximum current that the circuit can draw when activated.The PTCEL17R121NBE works by creating a temporary increase in the circuit’s resistance when the power is initially applied. This resistance increase can be up to 20 times higher than the typical operating resistance, which limits the amount of current that is drawn from the mains supply.Once the power is applied, the current will start to drop off as the thermal component of the PTCEL17R121NBE heats up. As this occurs, the resistance of the ICL will rapidly decrease, allowing normal levels of current to flow through the circuit.The PTCEL17R121NBE is suitable for a range of applications, such as motor control, lighting control, LED drivers, AC power supplies, and TVs. It can be used to protect both consumer electronics and industrial equipment, and is available in both surface mount and through hole packages.

Design Considerations for the PTCEL17R121NBE

When designing a system using the PTCEL17R121NBE, it is important to consider the thermal characteristics of the device. This is because the thermal component of the ICL will require a certain amount of time to heat up and therefore affect the amount of inrush current that is allowed into the circuit.In order to ensure that the ICL can limit the current efficiently, it is important to account for the voltage drop across the device when selecting the appropriate components for the circuit. It is typically recommended to select components that have an operating voltage three times the maximum operating voltage of the PTCEL17R121NBE in order to ensure that the device can operate at its specified limits.In addition, it is important to select an appropriate inductor size for the circuit, as this will help to ensure that the current is limited quickly and efficiently. This will help to ensure that the circuit will maintain its current limiting characteristics even when subjected to large inrush currents.

Conclusion

The PTCEL17R121NBE is a versatile Inrush Current Limiter (ICL) that is suitable for both consumer and industrial electronics applications. Its unique design provides a reliable and cost effective way of limiting the inrush currents that are generated when an electrical circuit is turned on. By designing a circuit with appropriate components and taking into account the voltage drop and thermal characteristics of the PTCEL17R121NBE, it is possible to ensure that the ICL will operate efficiently and protect the connected components from excessive inrush currents.

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

Part Number	Manufacturer	Price	Quantity	Description