SMAJ20CHE3/61

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TVS - Diodes

Transient Voltage Suppression (TVS) diodes are components designed to absorb high or low pulse voltage surges transmitted through electrical or electronic systems. They’re commonly found in automobiles, circuit boards, and other electrical systems. The SMAJ20CHE3/61 is a unidirectional transient voltage surge suppressor that offers an economical solution to power surges in products that require a small footprint. It can be used in a variety of consumer and professional electronic applications.

Application Field

The applications for the SMAJ20CHE3/61 include commercial, industrial, telecommunications, automotive, electronic equipment protection, home appliances, power systems, and power supply protection. It is also useful for portable and handheld devices. When AC electrical lines, automotive power lines, or DC power lines are subjected to varying and intermittent voltages that exceed the rated wattage of a particular product, the SMAJ20CHE3/61 absorbs and dissipates the excess energy through its high breakdown voltage. This energy absorption prevents serious damage to the electronic circuitry and reduces the risk of short circuits or permanent service disruption.

Working Principle

The SMAJ20CHE3/61 works by absorbing transient energy from voltage surges and dissipating it. Its bidirectional configuration is a unique feature that offers the maximum amount of resistance to noise, high-amplitude short duration spikes, and ESD (electrostatic discharge) protection. This diode can be used in three different configurations—reflective (bidirectional) mode, unidirectional mode, and transient voltage suppression (TVS) mode. All of these configurations offer the maximum possible level of surge protection.

Reflective (bidirectional) mode is the default mode in which both the positive and negative parts of the surge are fully suppressed and clamped using the clamped voltage. The total amount of current flow in the device is divided between the two ends and will be equal. Unidirectional mode offers protection on only one side of the surge, depending on the usage of either the anode or cathode. Transient voltage suppression (TVS) mode provides lightweight, fast response, and self-regulating protection due to the non-linear properties of the diode. It offers superior protection against high-amplitude, short-duration transients.

The SMAJ20CHE3/61 is designed to operate in temperatures up to 105°C, and can withstand exposure to functional temperatures up to 175°C. Its resistance to voltage and current transients makes it an ideal choice to provide low-profile surge protection for a variety of consumer and pro-audio electronic applications.

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