BY428 Diode Technical Summary

Overview

The BY428 is a rugged, high-performance diode housed in a glass passivated package, designed for demanding applications requiring high reliability and durability. This component is engineered to deliver superior performance in high-voltage and high-current scenarios, making it suitable for industrial, automotive, and power supply applications. The glass passivation ensures long-term stability and protection against environmental factors, enhancing the diode's operational lifespan.

Features

• Glass Passivated: Provides excellent protection against moisture and contaminants, ensuring long-term reliability.
• High Maximum Operating Voltage: Capable of handling high-voltage applications, making it ideal for power supply circuits.
• Low Forward Voltage Drop: Minimizes power loss and improves efficiency in energy-sensitive applications.
• High Surge Current Capability: Withstands transient overload conditions, enhancing durability in harsh environments.
• Fast Switching Speed: Suitable for high-frequency applications, reducing switching losses.
• High Temperature Stability: Operates reliably across a wide temperature range, making it suitable for automotive and industrial applications.

Applications

The BY428 diode is versatile and finds use in a variety of applications, including:

• Power Supplies: Used in rectification circuits for AC-DC conversion.
• Automotive Systems: Suitable for voltage regulation and protection in automotive electronics.
• Industrial Equipment: Employed in motor drives, inverters, and welding machines.
• Telecommunications: Used in power management and signal conditioning circuits.
• Consumer Electronics: Found in high-efficiency power adapters and battery chargers.

Electrical Characteristics

The following table summarizes the key electrical characteristics of the BY428 diode under standard operating conditions (unless otherwise specified):

Absolute Maximum Ratings

• Maximum Repetitive Reverse Voltage (V_RRM): 1000V
• Maximum RMS Voltage (V_RMS): 700V
• Maximum DC Blocking Voltage (V_DC): 1000V
• Maximum Average Forward Current (I_F(AV)): 1.0A
• Peak Forward Surge Current (I_FSM): 30A (single half-sine wave, 60Hz)
• Operating Junction Temperature Range (T_J): -55°C to +150°C

Typical Electrical Parameters

• Forward Voltage Drop (V_F): 1.1V at 1.0A
• Reverse Leakage Current (I_R): 5µA at 1000V
• Junction Capacitance (C_J): 15pF at 4V, 1MHz
• Reverse Recovery Time (t_rr): 500ns

Package Information

The BY428 diode is housed in a robust glass passivated package, designed to withstand mechanical stress and environmental challenges. Below are the key package details:

Package Dimensions

• Package Type: DO-41 (Glass Passivated)
• Body Length: 4.3mm (max)
• Body Diameter: 2.7mm (max)
• Lead Diameter: 0.8mm (nominal)
• Lead Length: 25.4mm (standard)

Thermal Characteristics

• Thermal Resistance (R_θJA): 50°C/W
• Storage Temperature Range: -55°C to +150°C

Conclusion

The BY428 diode is a high-reliability component designed for demanding applications where ruggedness and performance are critical. Its glass passivated construction, high voltage capability, and excellent thermal stability make it a preferred choice for power supply, automotive, and industrial applications. With its robust electrical characteristics and durable packaging, the BY428 ensures long-term reliability in even the most challenging environments.