SA18AHA0G

Voltage - Clamping (Max) @ Ipp:	39.4V
Supplier Device Package:	DO-204AC (DO-15)
Package / Case:	DO-204AC, DO-15, Axial
Mounting Type:	Through Hole
Operating Temperature:	-55°C ~ 175°C (TJ)
Capacitance @ Frequency:	--
Applications:	Automotive
Power Line Protection:	No
Power - Peak Pulse:	500W
Current - Peak Pulse (10/1000µs):	17.9A
Series:	Automotive, AEC-Q101, SA
Voltage - Breakdown (Min):	20V
Voltage - Reverse Standoff (Typ):	18V
Unidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Box (TB)

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Introduction

TVS, or transient voltage suppressor, diodes are designed to protect sensitive electronic components from voltage spikes. These voltage spikes can create current surges that can cause permanent damage to sensitive circuits. A TVS diode acts like a shock absorber, managing the sudden increase in voltage and current and quickly releasing them without adversely impacting the circuitry. The SA18AHA0G is a type of TVS diode designed to provide protection from high-energy transients such as electrostatic discharge (ESD).

Applications

The SA18AHA0G is a bidirectional, bipolar TVS diode. It is designed to shunt high-energy current spikes from transient voltage surges to ground and protect sensitive electronics from voltage peaks. The device is available in DO-41 (Mini SMD or SMA) packages, making it ideal for use in electronic assemblies with tight space constraints. This device is designed for use in a wide range of applications, including automotive, industrial, and consumer products. It can also be used in communications equipment, computers, smart cards, and medical equipment.

Working Principle

The working principle of the SA18AHA0G is based on the principle of Zener breakdown. When a voltage transient such as an electrostatic discharge (ESD) event occurs, the device conducts current, quickly absorbing the transient energy and shunting it to ground. The diode features an Avalanche pin, which stores energy before releasing it as an impulse to ground. The response time of the diode depends on how fast the voltage transient can be detected by the device. The SA18AHA0G is designed to provide fast response to transients in a bidirectional manner.

Features and Benefits

The SA18AHA0G offers several key features and benefits that make it an ideal protection device against transient voltage surges. These include:- Low leakage current: The leakage current of the SA18AHA0G is very low, reducing power consumption and improving system efficiency.- Avalanche current rating: The Avalanche current rating of the device is high, meaning it can dissipate more transient energy without risk of damage.- Bidirectional protection: The device can provide bidirectional protection from voltage transients, meaning it can protect against both positive and negative surges.- Optional Over voltage protection (OVP): The device can be equipped with optional OVP protection, providing an extra layer of protection.- Low cost: The SA18AHA0G is an inexpensive protection device, providing great value for money.

Conclusion

The SA18AHA0G is a bidirectional TVS diode designed to provide protection from high-energy transients such as ESD events. It is available in a compact DO-41 package and features low leakage current, high Avalanche current rating, and optional OVP protection. Thanks to its low cost and high performance, the SA18AHA0G is an ideal choice for applications such as automotive, industrial, and consumer electronics, and communications equipment.

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