Professional IC Distribution & Technical Solutions

The SA56-21SGDB is a surface-mount LED component manufactured by Kingbright. Below are the factual specifications, descriptions, and features:

Specifications:

• Part Number: SA56-21SGDB
• Manufacturer: Kingbright
• Type: Surface-Mount LED (SMD)
• Color: Green
• Lens Appearance: Water Clear
• Forward Voltage (Vf): 2.1V (typical)
• Forward Current (If): 20mA (standard)
• Luminous Intensity (Iv): 200mcd (minimum)
• Viewing Angle: 120°
• Wavelength (λp): 568nm (typical)
• Package Type: 0805 (2.0mm x 1.25mm)
• Operating Temperature Range: -40°C to +85°C
• Storage Temperature Range: -40°C to +100°C

Descriptions:

• Compact SMD LED designed for PCB mounting.
• High brightness with a wide viewing angle.
• Suitable for backlighting, indicators, and general illumination.

Features:

• Low power consumption.
• RoHS compliant.
• Lead-free and halogen-free.
• Compatible with reflow soldering processes.

This information is based on Kingbright's official datasheet for the SA56-21SGDB LED.

# Application Scenarios and Design Phase Pitfall Avoidance for the SA56-21SGDB

The SA56-21SGDB is a high-performance electronic component designed for precision applications where signal integrity and voltage regulation are critical. This device is commonly employed in telecommunications, industrial automation, and consumer electronics, where stable voltage references and transient suppression are essential. Understanding its application scenarios and potential design pitfalls ensures optimal performance and reliability in end-use systems.

## Key Application Scenarios

1. Telecommunications Equipment

In telecom infrastructure, the SA56-21SGDB serves as a voltage reference or transient suppressor in power management circuits. Its low leakage current and fast response time make it suitable for protecting sensitive RF modules and baseband processors from voltage spikes induced by lightning surges or power fluctuations.

2. Industrial Automation Systems

Industrial environments often expose electronic components to harsh conditions, including electromagnetic interference (EMI) and voltage transients. The SA56-21SGDB is used in PLCs (Programmable Logic Controllers), motor drives, and sensor interfaces to ensure stable operation by clamping excessive voltages and minimizing signal distortion.

3. Consumer Electronics

Devices such as smart home systems, wearables, and portable gadgets benefit from the SA56-21SGDB’s compact footprint and efficiency. It helps maintain consistent power delivery in battery-operated applications, preventing damage from overvoltage events during charging or load switching.

4. Automotive Electronics

While not a primary automotive-grade component, the SA56-21SGDB can be found in non-safety-critical automotive subsystems like infotainment or lighting controls, where transient suppression enhances durability against load dump and ignition noise.

## Design Phase Pitfall Avoidance

To maximize the effectiveness of the SA56-21SGDB, engineers should consider the following design best practices:

1. Proper PCB Layout Considerations

• Placement: Position the component as close as possible to the protected IC or power rail to minimize parasitic inductance, which can degrade transient response.
• Trace Routing: Use wide, low-impedance traces to reduce voltage drops and ensure efficient clamping during surge events.

2. Thermal Management

• The SA56-21SGDB dissipates energy during transient events, which can lead to self-heating. Ensure adequate thermal relief via copper pours or heatsinking if repetitive high-energy pulses are expected.

3. Voltage and Current Ratings

• Verify that the operating voltage does not exceed the device’s maximum ratings under worst-case conditions. Overstressing the component can lead to premature failure.
• Account for peak current handling capabilities, especially in applications with frequent transient events.

4. Compatibility with Other Protection Devices

• In systems requiring multi-stage protection (e.g., TVS diodes + SA56-21SGDB), ensure proper coordination to avoid unintended interactions that may reduce effectiveness.

5. Environmental Factors

• For industrial or automotive applications, confirm that temperature ranges, humidity, and vibration tolerances align with the component’s specifications.

By carefully integrating the SA56-21SGDB into the design while addressing these potential pitfalls, engineers can enhance system robustness and longevity. Proper application-specific validation, including transient testing and thermal analysis, further ensures reliable performance in real-world conditions.