MPT-8

Voltage - Clamping (Max) @ Ipp:	11.5V
Supplier Device Package:	DO-13
Package / Case:	DO-13
Mounting Type:	Through Hole
Operating Temperature:	-65°C ~ 175°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	1500W (1.5kW)
Current - Peak Pulse (10/1000µs):	100A
Series:	Military, MIL-PRF-19500
Voltage - Breakdown (Min):	9.4V
Voltage - Reverse Standoff (Typ):	8V
Unidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction
TVS (Transient Voltage Suppressors) diodes are an important component in providing protection to circuits from high-voltage events. Generally used as a safeguard for preventing overvoltage conditions, they are capable of dissipating excess energy from a system, thus protecting the system from components and wires experiencing electrical overloads. One of the widely used TVS diodes is the Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) diode, also known as the MPT-8 (Minimum Peak Pulse Power 8). It is a voltage clamp device that can be used to suppress transients in the case of high-voltage events, as well as protect circuits from high-voltage defects.

Application fields and working principle
The MPT-8 is mostly used in high-voltage protection circuits, such as in home electronics, LED lighting fixtures, and automotive applications. In particular, its low capacitance and fast switching characteristics make it an ideal choice for preventing voltage surges in these circuits. Moreover, it offers superior high-temperature operation and high-current breakdown capability.

The MPT-8 is a diode with an integrated MOSFET that is designed to clamp any voltage above its breakover voltage to a predetermined safe voltage level. It is composed of an epitaxially-grown p-n-p-n structure which consists of two p-type and n-type doping layers that are separated by a n-type doping layer (also known as the Pwell). As a result, when a voltage surge is applied to the device, the Pwell turns on, causing the MPT-8 to start conducting and flow current. Then, when the voltage exceeds the breakover voltage, the Pwell reaches a peak voltage, which in turn effectively clamps the voltage back down, thereby limiting the surge.

Another important feature of MPT-8 is its fast response time which is due to its low capacitance. It typically has a rise time of 1ns and a fall time of 80ns, making it one of the fastest responding TVS devices on the market. This is one of the main reasons why it is suitable for high-speed applications. Moreover, since it operates in the reverse-biased condition, it can also provide protection against voltage spikes and transients.

Finally, the MPT-8 is designed to protect circuits against ESD (Electrostatic Discharge) and EMI (Electromagnetic Interference). As such, it is often used in combination with Surge Suppressors, Transient Voltage Affinity Circuits (TVAC) and Line Replacement Units (LRU), to provide comprehensive protection from transients and transient-related failures.

Conclusion
The MPT-8 is a high-performance device that is designed to provide superior protection against transients and voltage surges in a variety of applications. It is capable of dissipating excess energy from a system, and is suitable for high-speed applications due to its fast response time. Moreover, it is also used to protect circuits against ESD and EMI, making it a valuable component in providing comprehensive protection against overvoltage conditions.

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