BYD31 - Cavity Free Cylindrical Glass Package Diode

Overview

The BYD31 is a high-performance diode featuring a cavity-free cylindrical glass package. This component is designed for applications requiring reliable rectification and voltage regulation. The glass passivation ensures excellent environmental protection and long-term stability, making it suitable for harsh operating conditions. With its high maximum operating characteristics, the BYD31 is ideal for both industrial and commercial applications.

Features

• Glass Passivated: Provides superior protection against environmental factors such as moisture and contaminants, ensuring long-term reliability.
• High Maximum Operating Temperature: Capable of functioning efficiently under elevated temperature conditions, making it suitable for demanding applications.
• Cavity-Free Design: Eliminates internal cavities, reducing the risk of internal arcing and improving overall durability.
• Cylindrical Glass Package: Offers robust mechanical strength and excellent thermal performance.
• Low Forward Voltage Drop: Enhances energy efficiency by minimizing power losses during operation.
• Fast Switching Speed: Suitable for high-frequency applications, ensuring minimal delay in signal processing.

Applications

The BYD31 is versatile and can be used in a wide range of applications, including but not limited to:

• Power Supplies: Used in rectification circuits to convert AC to DC in power supply units.
• Voltage Regulation: Employed in voltage regulator circuits to maintain stable output voltages.
• Industrial Equipment: Ideal for use in heavy machinery and industrial automation systems due to its rugged design.
• Consumer Electronics: Found in devices such as televisions, audio equipment, and home appliances.
• Automotive Systems: Suitable for automotive electronics where reliability under harsh conditions is critical.
• Telecommunications: Used in signal processing and power management within communication devices.

Electrical Characteristics

The following table outlines the key electrical characteristics of the BYD31 diode under standard operating conditions (unless otherwise specified):

Absolute Maximum Ratings

• Maximum Reverse Voltage (V_R): 200V
• Maximum Forward Current (I_F): 3A
• Peak Forward Surge Current (I_FSM): 50A (non-repetitive)
• Maximum Operating Temperature (T_j): +150°C
• Storage Temperature Range (T_stg): -65°C to +175°C

Typical Electrical Characteristics

• Forward Voltage Drop (V_F): 1.1V at 3A
• Reverse Leakage Current (I_R): 5µA at 200V
• Junction Capacitance (C_j): 15pF at 0V, 1MHz
• Reverse Recovery Time (t_rr): 50ns

Package Information

The BYD31 is housed in a cylindrical glass package, which provides excellent thermal and mechanical properties. Below are the detailed package specifications:

Mechanical Dimensions

• Package Type: DO-35 (Cylindrical Glass)
• Body Diameter: 2.5mm (max)
• Body Length: 5.0mm (max)
• Lead Diameter: 0.5mm (nominal)
• Lead Length: 25mm (standard)

Package Marking

The BYD31 diode is marked with the following information for identification:

• Part Number: "BYD31" printed on the body.
• Cathode Indicator: A band or stripe on one end of the diode denotes the cathode terminal.

Thermal Characteristics

• Thermal Resistance (R_θJA): 50°C/W
• Power Dissipation (P_D): 1.0W at 25°C ambient temperature

Reliability and Compliance

The BYD31 diode is designed to meet stringent reliability standards and complies with the following industry requirements:

• RoHS Compliance: The component is compliant with the Restriction of Hazardous Substances directive, ensuring environmental safety.
• MIL-STD-750: Tested for military-standard reliability, including thermal shock and mechanical vibration resistance.
• Flammability Rating: UL94 V-0 compliant, indicating high resistance to flame propagation.

Conclusion

The BYD31 diode is a high-performance, glass-passivated component designed for demanding applications. Its cavity-free cylindrical glass package ensures durability and reliability, while its electrical characteristics make it suitable for a wide range of industrial, commercial, and automotive uses. With robust thermal performance and compliance with industry standards, the BYD31 is an excellent choice for engineers seeking a dependable diode solution.