MPLAD18KP170AE3 Circuit Protection

Voltage - Clamping (Max) @ Ipp:	275V
Supplier Device Package:	PLAD
Package / Case:	Nonstandard SMD
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 150°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	18000W (18kW)
Current - Peak Pulse (10/1000µs):	66A
Series:	Military, MIL-PRF-19500
Voltage - Breakdown (Min):	189V
Voltage - Reverse Standoff (Typ):	170V
Unidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction to TVS-Diodes

Tunneling varistors or transient voltage suppressors (TVS) diodes are electronic components designed to protect circuits against electrical over-voltage, over-current, and transients. They are also commonly referred to as surge suppression diodes, surge protection diodes, or spark-gap diodes. These devices are classified as a type of voltage clamping component, which behaves like a diode, but instead of blocking the flow of current, it will automatically adjust the voltage according to a pre-set limit. During normal operations, the TVS diode offers very low resistance to current flow, whereas, during a surge, it will act as an open circuit, effectively blocking the current from flowing.

MPLAD18KP170AE3 Features and Applications

The MPLAD18KP170AE3 is a low-capacitance (6.4pF typ) TVS diode designed for ESD and surge protection applications. It has in-line leads, allowing for easy installation and replacement in tight fits circuit designs. The device is rated at 150W peak pulse power (TP) and its breakdown voltage is rated at 17.5V (max). The MPLAD18KP170AE3 is also RoHS-compliant and UL-listed, making it an ideal choice for various types of applications. This TVS diode is specifically designed for protection against transients in communication and data line protection applications, such as Internet of Things (IoT) devices and consumer electronics. This makes the diode ideal for areas prone to ESD or surge events, as it provides superior protection against these transients. The diode works by clamping the voltage at a pre-determined level, limiting the peak transient voltage and ensuring the safety of connected devices. This ensures reliable, trouble-free operation with minimal downtime, even in the presence of damaging electrical transients.

MPLAD18KP170AE3 Working Principle

When the voltage increases beyond the zener voltage of the MPLAD18KP170AE3, the device enters into avalanche breakdown region. This causes conduction across the pn junction and a reduction in the voltage across the device, thus allowing for clamping of the system. In other words, the MPLAD18KP170AE3 works by diverting the transient current away from the circuit when it exceeds the zener voltage of the device. The device provides a voltage-dependent path for the transient current to flow through, thus ensuring that the system remains safe from the surge.When the voltage of the circuit decreases below the zener voltage, the device will turn off and the transient current will dissipate. This ensures that the system can remain safe and operational throughout the lifetime of the device.

Conclusion

The MPLAD18KP170AE3 is a low-capacitance TVS diode designed for ESD and surge protection applications. It is rated at 150W peak pulse power and 17.5V (max) breakdown voltage, making it ideal for a variety of applications. The device is specifically designed for protection against transients in communication and data line protection applications.When the voltage increases beyond the zener voltage of the device, the device will enter into avalanche breakdown region, thus clamping the voltage at a pre-determined level and limiting the peak transient voltage. When the voltage decreases below the zener voltage, the device will turn off and the transient current will dissipate, thus ensuring the safety of the circuit.

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