SMDA03E3/TR7

Current - Peak Pulse (10/1000µs):	5A (8/20µs)
Base Part Number:	SMDA03
Supplier Device Package:	8-SO
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 150°C (TJ)
Capacitance @ Frequency:	600pF @ 1MHz
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	300W
Series:	TVSarray™
Voltage - Clamping (Max) @ Ipp:	9V
Voltage - Breakdown (Min):	4V
Voltage - Reverse Standoff (Typ):	3.3V
Unidirectional Channels:	4
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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TVS - Diodes

Transient voltage suppressors (TVS) are widely used to protect sensitive circuits and systems from transient voltage events, especially within the automotive industry. The SMDA03E3/TR7, a transient voltage suppression diode, is commonly used to protect automotive systems from voltage transients. This paper will outline the SMDA03E3/TR7 application field and working principle.The SMDA03E3/TR7 is primarily designed to protect automotive systems from voltage transients, such as those created by a spark’s electrical current. The diode can handle energy levels that exceed its normal voltage ratings, allowing it to function as an effective voltage suppressor. The protection it offers is typically 5V to 24V, depending on the diode’s construction and operating conditions. The device can withstand up to 200V in reverse operating conditions.The SMDA03E3/TR7 can be applied in a variety of ways in vehicle design, depending on the intended protection application. The device is designed to absorb device-level ESD (electrostatic discharge) protection, so that’s where the device is most often used. It’s also an effective solution for over-voltage protection, providing both protection and fuel economy on vehicles. It is an ideal choice for systems that experience heavy shock pulses, such as the ignition modules of modern vehicles.The SMDA03E3/TR7 works thanks to its junction diode structure. The diode structure is built to handle both forward and reverse bias currents, allowing the device to withstand both positive and negative voltage spikes. The device has two distinct breakdown regions, known as the zener and avalanche breakdown regions. The zener breakdown region activates when the forward voltage exceeds the diode’s rated zener voltage. The avalanche breakdown region activates when the reverse voltage exceeds the diode’s reverse breakdown voltage.Whenever voltage conditions change, the SMDA03E3/TR7 activates an avalanche or zener reaction, which causes it to clamp the voltage at a safe level. The device then dissipates the remaining energy, eliminating it from the system. This allows the device to quickly and effectively suppress the voltage spike, thus protecting the system from harm.The SMDA03E3/TR7 is an effective and reliable solution for automotive systems that are prone to voltage transients. The junction diode structure of the device allows it to handle both forward and reverse bias currents, allowing it to effectively and quickly clamp transients. That means that the device can provide reliable protection to automotive systems, without compromising performance or fuel economy.

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