SMDJ58A R7G

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TVS (Transient Voltage Suppressor) diodes are used to protect sensitive electronic devices from damage caused by electrostatic discharge (ESD) and electrical fast transients. The SMDJ58A R7G is a glass-passivated junction unidirectional TVS diode designed specifically for use in sensitive industrial and military applications. It is able to handle a wide range of power in various environments and features superior surge performance, excellent clamping capability, fast response time, low leakage current, and low operating voltage.

The SMDJ58A R7G diode is primarily used in the industrial and military applications like automotive electronics, telecom power supplies, medical equipment, military equipment, etc. to provide protection to the components from over-voltage stress due to lightning strike, motor spikes, or other events. This diode is also capable of providing extended protection from powerful electric transients, including electrostatic discharges (ESD). The diode can provide sustained high current pulses of up to 18A and pulse current of 25A (8/20μs).

The SMDJ58A R7G TVS diode has a reverse standoff voltage range of 7V to 41V and a forward voltage drop of 0.55V. It is designed to handle surge pulse power of 500W and repetitive peak power of 6W. It has an operating temperature range of -40°C to +125°C and a maximum clamping voltage of 45V. The diode is available in a standard SMA-DO-214AA package and standard lead spans of 0.2” (5.08mm).

The working principle of SMDJ58A R7G is simple. In normal operation, no reverse bias voltage is applied to the diode, so the diode remains in the open circuit. However, when an overvoltage or reverse ESD pulse is applied to the diode, the semiconductor junction immediately clamps the voltage, allowing the excess current to flow through the diode. The diode is designed with an internal parasitic capacitor to absorb the ESD energy. This capacitor is discharged slowly during the fall time of the pulse. Once the excess current has been reduced to a safe level, the diode turns off and the device returns to its normal open circuit state.

In summary, the SMDJ58A R7G TVS diode is an ideal choice for protecting sensitive components from overvoltage and ESD pulses. It features low operating voltage, low leakage current, fast response time, excellent clamping capability, and superior surge performance. It is available in a standard SMA-DO-214AA package and standard lead spans of 0.2” (5.08mm).

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