SMDA15-6E3/TR7 Circuit Protection

A Transient Voltage Suppression (TVS) diode, such as the SMDA15-6E3/TR7, is a specialized semiconductor device used to protect electrical components and circuits from transients and Over Voltage (OV) conditions. It is an integral part of every power system. The SMDA15-6E3/TR7 is a Uni-Directional TVS diode, designed for portable electronic devices and computer peripherals. This diode series is capable of protecting against ESD and other transients generated by dynamics in electrical systems. It provides protection in a low initial capacitance (<2pF) and low series resistance package.

The SMDA15-6E3/TR7 is available in a SOD-323 package and is protected against reverse polarity up to 3Amp. The SMDA15-6E3/TR7 has an operating voltage range from 6.5volts to 14.5volts and has a peak pulse power rating of 400W (tP=8/20μs). The ESD protection is tested in accordance with IEC 61000-4-2 at 2 and 8KV (up to 1100pF) and the IEC 61000-4-5 for surge immunity up to 2A. Its response time is 3ns.

The SMDA15-6E3/TR7 application field and working principle is simple. It is designed to provide protection under OV conditions caused by over voltage on AC or DC lines. When an Over Voltage appears, the diode bridges the line, providing current control. The current flowing through the diode is limited to the rated peak pulse power and energy which the diode can absorb and safely dissipate. The diode then slowly dissipates the energy, allowing the circuit to return to its normal state when the OV condition has passed.

The SMDA15-6E3/TR7 has a bidirectional breakdown voltage that is higher than the working voltage of the device. This means that the diode becomes a conductor if the voltage across its terminals reaches a certain value, protecting the device and its associated components from voltage or current spikes. The diode also has the capability to reset itself after an overvoltage event, known as a mountain-climb effect. If the voltage across the diode goes above its clamping voltage and the peak pulse power rating is exceeded, the diode will enter avalanche breakdown and cause additional current flow. Since the device has self-resetting capability, it returns to its normal state after the overvoltage event.

The SMDA15-6E3/TR7 has many advantages, including its small size and low cost. It also has several application advantages, including fast response time, low clamping voltage, low series resistance, and a low capacitance of <2pF. This small package also has high surge capability and look over voltage protection. The SMDA15-6E3/TR7 can be used in automotive applications such as 12V dc power lines where high voltage transients or surges may occur.

In summary, the SMDA15-6E3/TR7 is a Uni-Directional TVS diode designed for portable electronic devices and computer peripherals. It is the perfect choice for any application that requires ESD, surge or over voltage protection, offering excellent performance in a small package. This diode series has an operation voltage range from 6.5volts to 14.5volts, a peak pulse power rating of 400W, and a fast response time of 3ns. The device has a low capacitance of <2pF and low series resistance making it perfect for applications such as 12V dc power lines.