What are the commonly used packaging options for Schottky diodes?

The packaging form of Schottky diodes (SBDs) directly affects their heat dissipation performance, current capacity, and applicable scenarios. The following is a systematic review based on technical standards and engineering practices, covering four dimensions: plug-in, patch, special packaging, and selection logic:
1、 Plug in packaging: the main force in traditional high-power scenarios
DO-41 packaging
Technical features: Axial pin with a diameter of approximately 2.7mm, suitable for high current (>1A) scenarios.
Typical models: 1N5817 (20V/1A), 1N5822 (40V/3A).
Application scenarios: power electronic devices, motor drives, industrial power supplies.
DO-15 packaging
Technical features: Metal glass packaging, strong anti vibration performance, temperature range coverage -55 ℃ to 175 ℃.
Typical models: MBR20100CT (100V/20A), MBR3045PT (45V/30A).
Application scenarios: automotive electronics, aerospace, military equipment.
DO-201 packaging
Technical features: Large size plug-in packaging, excellent heat dissipation performance, suitable for high-voltage and high current scenarios.
Typical models: STPS60SM100C (100V/60A), C8D20120D (1200V/20A).
Application scenarios: Photovoltaic inverters, electric vehicle charging stations, high-voltage direct current power sources.
2、 Surface mount packaging: the preferred choice for high-density integration and automated production
SOD-123 packaging
Technical features: Small patch packaging, with dimensions of approximately 3.7mm × 1.6mm, suitable for space constrained scenarios.
Typical models: BAT54C (30V/0.2A), B5819WS (40V/1A).
Application scenarios: Smartphones, IoT modules, TWS earphones.
SMA/SMB/SMC packaging
Technical features:
SMA: Size approximately 5.2mm × 2.1mm, current capacity ranging from 1A to 10A.
SMB: Approximately 6.7mm x 3.7mm in size, with a current capacity of 5A-20A.
SMC: Size approximately 10.7mm x 5.6mm, current capacity 10A-40A.
Typical models: MBR10100 (100V/10A), MBR20100 (100V/20A).
Application scenarios: consumer electronics, communication devices, automotive electronics.
TO-277/D2PAK package
Technical features:
TO-277: Surface mount power package, integrated heat dissipation pads, power up to 100W.
D2PAK: Large size power package with a current capacity of 60A.
Typical models: C8D20120D (1200V/20A), STPS60SM10C (100V/60A).
Application scenarios: industrial control, new energy vehicles, power electronics.
3、 Special Packaging: Technological Breakthrough in Customized Scenarios
MELF packaging
Technical features: Cylindrical pinless design, low parasitic inductance, excellent high-frequency characteristics.
Typical models: PMEG3010EH (30V/1A), BAS70 (100V/0.2A).
Application scenarios: RF circuits, precision measurement, aerospace.
Flexible packaging
Technical features: Adopting a composite structure of nano silver wires and Schottky junctions to achieve bendable design (bending radius<1mm).
Typical model: Customized flexible SBD.
Application scenarios: Wearable devices, flexible electronics, medical implants.
Integrated packaging
Technical features: Integrating Schottky diodes with MOSFETs, TVS diodes, and other components to reduce parasitic inductance.
Typical model: PCM60N03 (SBD+MOSFET single-chip integrated).
Application scenarios: 5G base station power supply, data center servers, electric vehicle OBC.
4、 Selection logic and scene matching
Current and power requirements
Low current scenario (<1A): SOD-123 package is preferred to balance miniaturization and cost.
Medium current scenario (1A-10A): Balanced performance and space of SMA/SMB packaging.
High current scenario (>10A): SMC/TO-277 packaging ensures heat dissipation and reliability.
Heat dissipation and reliability requirements
High power scenario: Choose TO-277/D2PAK package and use heat dissipation pads to reduce thermal resistance.
Vibration environment: Priority is given to DO-15 metal glass packaging, which improves vibration resistance performance by three times.
High frequency and miniaturization requirements
RF circuit: Choose MELF package, parasitic inductance as low as 0.5nH.
Portable devices: Choose SOD-123 or customized flexible packaging to adapt to the trend of miniaturization.
Customization for special scenarios
Automotive Electronics: Confirm AEC-Q101 certification, prioritize DO-15 or SMC packaging.
Aerospace applications: Verify radiation resistance and mechanical strength, select special packaging or customized models.
5、 Development Trends of Packaging Technology
Power density improvement: Through 3D packaging technology, SMC packaging achieves a power density of 3W/mm ².
Breakthroughs in miniaturization: 0201 patch Schottky diode (0.6mm × 0.3mm) has entered the mass production stage.
Integrated design: SBD and MOSFET are integrated on a single chip, reducing parasitic inductance by 60%.
Material innovation: SiC Schottky diodes improve efficiency by over 20% in high voltage and high frequency scenarios.
Through comprehensive matching of packaging form, current capacity, heat dissipation performance, and special functions, Schottky diode selection schemes suitable for different scenarios can be constructed. In practical engineering, it is necessary to combine circuit simulation and reliability testing verification to ensure a deep fit between packaging and requirements.