SMDJ20C Diode: Encyclopedia Entry

Product Overview

The SMDJ20C diode belongs to the category of transient voltage suppressor (TVS) diodes. These diodes are used to protect sensitive electronic components from voltage spikes and transients. The SMDJ20C diode is characterized by its high surge capability, low clamping voltage, and compact surface-mount package. It is typically available in tape and reel packaging with a specified quantity per reel.

Specifications

• Voltage Rating: 20V
• Peak Pulse Power: 3000W
• Package Type: DO-214AB (SMC)
• Quantity: Typically 5000 pieces per reel

Detailed Pin Configuration

The SMDJ20C diode has two pins, anode, and cathode, which are denoted by the markings on the package. The anode is typically marked with a line, while the cathode may be marked with a different symbol or left unmarked.

Functional Features

• Transient Voltage Suppression: Effectively clamps transient voltages to protect downstream components.
• Fast Response Time: Rapid reaction to voltage spikes ensures minimal impact on the protected circuitry.
• Low Leakage Current: Ensures minimal power loss during normal operation.

Advantages and Disadvantages

Advantages

• High surge capability
• Low clamping voltage
• Fast response time

Disadvantages

• Higher cost compared to standard diodes
• Sensitive to reverse voltage polarity

Working Principles

The SMDJ20C diode operates based on the principle of avalanche breakdown and metal oxide varistor (MOV) action. When a transient voltage spike occurs, the diode rapidly conducts, diverting the excess energy away from the protected circuitry and limiting the voltage across it.

Detailed Application Field Plans

The SMDJ20C diode finds extensive use in various applications, including: - Telecommunications: Protecting sensitive communication equipment from lightning-induced surges. - Power Supplies: Safeguarding power supply units from voltage transients. - Automotive Electronics: Shielding vehicle electronics from electrical disturbances.

Detailed and Complete Alternative Models

• P6SMB20CA: Similar TVS diode with 20V rating and SMC package.
• 1.5SMC20CA: TVS diode with higher power rating and SMC package.

In conclusion, the SMDJ20C diode offers robust transient voltage suppression capabilities, making it an essential component in safeguarding sensitive electronic circuits from voltage spikes and transients.

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