Current - Peak Pulse (10/1000µs):	49A
Base Part Number:	1.5KE22
Supplier Device Package:	1.5KE
Package / Case:	DO-201AA, DO-27, Axial
Mounting Type:	Through Hole
Operating Temperature:	-55°C ~ 175°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	1500W (1.5kW)
Series:	TransZorb®
Voltage - Clamping (Max) @ Ipp:	30.6V
Voltage - Breakdown (Min):	20.9V
Voltage - Reverse Standoff (Typ):	18.8V
Unidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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TVS - Diodes

1.5KE22A-E3/51 is a Transient Voltage Suppression (TVS) Diode widely used for protecting devices from overvoltage conditions, particularly those caused by electrostatic discharge (ESD). Commonly found in electronics such as portable devices, computers, and audio/video equipment, these TVS diodes are known for their excellent performance in bidirectional protection from low to high voltage transients.

Application Field

These diodes are widely used to protect a variety of circuits and equipment from surges caused by external events such as lightning strikes. By suppressing or clamping transients at a given threshold voltage, this decreases the risk of component and circuit board failure. They are often an integral component in other types of surge protection devices such as surge suppression strips and line filters.The 1.5KE22A-E3/51 TVS diode has some key performance characteristics that make it suitable for a wide range of applications. It has a maximum peak pulse power rating of 1500W at 10/1000μs waveforms, 15 volts for the lowest breakdown voltage, and a maximum peak pulse current rating of 4A. It is capable of clamping transients up to 28.6V at non-repetitive peak pulses, and it absorbs transients at the clamped voltage of up to 5V.The diode is designed for applications where the operating environment is hostile, typically found in industrial and off-road vehicles. In addition, 1.5KE22A-E3/51 is great for protecting against electrical transients caused by ESD and surges in the most sensitive electronic components including PCs, laptops, tablets, and mobile phones.

Working Principle

TVS diodes work by clamping current during power ‘surges’. So when a voltage spike rises beyond the junction voltage rating, the diode becomes conductive, allowing current to pass through. This diverts or shunts the Surge current away from the device, preventing it from damaging delicate components. To achieve protection from high energy transients, the 1.5KE22A-E3/51 TVS Diode utilizes a Zener diode along with an external capacitor. The Zener diode conducts current when the applied voltage reaches its Zener Breakdown Voltage, which helps protect these components from overvoltage. The capacitor stores the transient energy and then dissipates it as the transient event passes, allowing the diode to return to its non-conductive state.In the absence of surge or ESD, the diode remains in its non-conductive mode, thereby avoiding any power dissipation. However, this diode cannot protect against conditions that exceed the threshold voltage, or those that have an extremely fast rising time. In such cases, the diode is not effective and must be combined with other components to provide effective protection.TVS diodes are well-suited for protecting sensitive electronics against transient events and provide good levels of protection. When choosing the 1.5KE22A-E3/51 TVS diode, it is important to understand its performance characteristics and select the correct application for maximum protection.

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