SMP33A-M3/85A Circuit Protection

Voltage - Clamping (Max) @ Ipp:	53.3V
Supplier Device Package:	DO-220AA (SMP)
Package / Case:	DO-220AA
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 150°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	400W
Current - Peak Pulse (10/1000µs):	7.5A
Series:	TransZorb®, eSMP®
Voltage - Breakdown (Min):	36.7V
Voltage - Reverse Standoff (Typ):	33V
Unidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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SMP33A-M3/85A Device Overview

A TVS (transient voltage suppressor) diode, such as SMP33A-M3/85A, is an electrical devices used to protect sensitive electronic components, such as integrated circuits (ICs), from electrical transients. The SMP33A-M3/85A is a bidirectional diode that is designed to protect against high-it spikes, voltages that can exceed the operating maximum ratings of vulnerable components.

SMP33A-M3/85A Application Fields

TVS diode products like the SMP33A-M3/85A are commonly used in a variety of applications to prevent overvoltage faults, spikes, and other forms of overvoltage transients. Examples of these applications include:

• Automotive electronic systems
• Industrial control systems
• Consumer electronics
• Automated systems for smart homes
• Power supplies and DC-DC converters

TVS diodes are particularly useful in automotive applications due to their ability to withstand an extended range of temperatures. They are also ideal for dealing with the high-energy transients that can be generated from ESP or ABS systems. In the industrial control systems, TVS diodes offer surge protection in circuits that are subject to high-voltage transients, seismic conditions, electrostatic discharges, and other harsh environmental variables.

SMP33A-M3/85A Working Principle

The SMP33A-M3/85A device is a bidirectional diode that is designed to protect vulnerable electronic components from overvoltage transients. The TVS diode works by clamping the voltage above a set threshold. This process starts when the voltage reaches the breakdown voltage of the diode. At this point, the diode begins to conduct current until the magnitude of the voltage decreases below the breakdown voltage. When the voltage is below the breakdown voltage, the diode is not activated. Activation occurs, however, when the voltage reaches or exceeds the avalanche voltage of the diode. This is the point at which the diode starts to conduct current and initiates peak current clamping.When the peak current clamping begins, it continues until the voltage falls below the avalanche voltage and the current begins to decrease. As the current decreases, the voltage is also decreased and the device returns to its non-conducting state.The SMP33A-M3/85A utilizes a novel design that combines the best features of both Zener and avalanche breakdown structures. It is configured as a bidirectional diode, meaning that it is capable of detecting and limiting transients from either direction. This allows it to provide superior protection from both volatile or reverse polarity transients.

Conclusion

The SMP33A-M3/85A is an advanced TVS diode that provides high-quality protection to a variety of electronics and electrical systems. This diode is designed to detect and clamp high-voltage transients both in forward and reverse directions. Its high-performance characteristics make it ideal for a variety of applications, including automotive, consumer electronics, industrial control systems, and automated smart homes.

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