BAT81 Planar Schottky Barrier Diode

Overview

The BAT81 is a high-performance planar Schottky barrier diode designed for applications requiring low forward voltage drop and high breakdown voltage. It features an integrated protection ring to guard against static discharges, ensuring enhanced reliability in sensitive circuits. Encapsulated in a hermetically-sealed subminiature SOD68 (DO-34) glass package, the BAT81 is suitable for mounting on a standard 2 E (5.08 mm) pitch, making it ideal for space-constrained designs.

This diode is optimized for high-frequency and fast-switching applications, offering superior performance compared to conventional PN-junction diodes. Its hermetically-sealed construction ensures long-term stability and resistance to environmental factors such as moisture and contaminants.

Features

• Low Forward Voltage: Minimizes power loss and improves efficiency in switching applications.
• High Breakdown Voltage: Provides robust performance in high-voltage circuits.
• Guard Ring Protection: Integrated protection ring enhances ESD (electrostatic discharge) resilience, safeguarding the diode from static damage.
• Hermetically-Sealed Package: The SOD68 (DO-34) leaded glass encapsulation ensures durability and resistance to environmental stress.
• Subminiature Form Factor: Compact SOD68 package allows for high-density PCB layouts.
• High Switching Speed: Ideal for high-frequency rectification and fast-switching circuits.

Applications

The BAT81 Schottky barrier diode is well-suited for a variety of applications, including but not limited to:

• Power Rectification: Efficiently converts AC to DC in power supplies and converters.
• High-Frequency Circuits: Used in RF and microwave applications due to its fast switching characteristics.
• Voltage Clamping: Protects sensitive components from voltage spikes and transients.
• Reverse Polarity Protection: Safeguards circuits from damage due to incorrect power supply connections.
• Signal Demodulation: Extracts modulated signals in communication systems.
• Solar Panel Bypass Diodes: Prevents power loss in photovoltaic systems by bypassing shaded or faulty cells.

Electrical Characteristics

The following table summarizes the key electrical specifications of the BAT81 Schottky barrier diode under typical operating conditions (unless otherwise noted):

Absolute Maximum Ratings

• Maximum Repetitive Reverse Voltage (V_RRM): 30 V
• Maximum Average Forward Current (I_F(AV)): 200 mA
• Peak Forward Surge Current (I_FSM): 1 A (pulsed, t_p = 1 s)
• Operating Junction Temperature Range (T_j): -65°C to +150°C
• Storage Temperature Range (T_stg): -65°C to +150°C

Electrical Parameters

• Forward Voltage Drop (V_F): 0.55 V (typical) at I_F = 10 mA
• Reverse Leakage Current (I_R): 5 µA (maximum) at V_R = 30 V
• Total Capacitance (C_t): 2 pF (typical) at V_R = 0 V, f = 1 MHz
• Reverse Recovery Time (t_rr): 4 ns (typical) at I_F = 10 mA, I_R = 1 mA

Package Information

The BAT81 is housed in a hermetically-sealed SOD68 (DO-34) glass package, which provides excellent mechanical and environmental protection. The package dimensions and pin configuration are as follows:

Mechanical Specifications

• Package Type: SOD68 (DO-34)
• Body Diameter: 1.8 mm (max)
• Body Length: 3.6 mm (max)
• Lead Diameter: 0.5 mm (nominal)
• Lead Spacing (Pitch): 5.08 mm (2 E)
• Weight: Approx. 0.02 g

Pin Configuration

The BAT81 is a two-terminal device with the following pinout:

• Anode (A): Connected to the positive terminal in forward bias.
• Cathode (K): Connected to the negative terminal in forward bias.

Reliability and Compliance

The BAT81 Schottky barrier diode is designed to meet stringent reliability standards and is compliant with industry regulations, including:

• RoHS (Restriction of Hazardous Substances) compliant.
• Hermetic sealing ensures resistance to moisture and contaminants per MIL-STD-883.
• ESD protection meets industry-standard robustness requirements.

Conclusion

The BAT81 planar Schottky barrier diode is a high-reliability component offering low forward voltage, high breakdown voltage, and integrated ESD protection. Its compact SOD68 package and hermetically-sealed construction make it an excellent choice for demanding applications in power rectification, high-frequency circuits, and voltage clamping. With its robust electrical characteristics and durable packaging, the BAT81 is well-suited for both commercial and industrial applications where performance and reliability are critical.