1N5811 Datasheet: Application and Analysis

1N5811 rectifier diode drawing taken from the 1N5811 datasheet

The IN5811 is an “ultrafast recovery”  rectifier diode designed for high-reliability applications where failure can’t be tolerated. A rectifier diode is a semiconductor device that converts alternating current (AC) into direct current (DC). Essentially, it rectifies the alternating voltage by allowing current to flow in only one direction. When the voltage across its terminals is in the forward direction, the rectifier diode conducts current, while when the voltage is in the reverse direction, it blocks current.

Rectifier diodes are crucial components in power supply circuits because of their unidirectional property, which turns fluctuating AC voltages into steady DC voltages suitable for electronic devices. Some other key applications of rectifier diodes include:

  • Battery chargers
  • Signal demodulation
  • DC motor drives
  • Welding power supplies
  • Uninterruptible power supplies
  • Photovoltaic systems
  • Radio frequency identification
  • High voltage direct current transmission
  • Audio amplifiers

As shown above, rectifier diodes; such as the IN5811, can be used a wide range of systems to ensure the delivery of stable power. This includes benign communications devices to hazardous environments where vibration, intermittent motion, or fluctuating temperatures are concerns. These applications showcase the versatility of rectifier diodes across various industries and electronic devices.

IN5811 Datasheet: Applications and Features

As indicated in the Microsemi’s IN5811 datasheet, the IN5811 rectifier diode’s features make it especially useful for military and space applications. Key features and common applications are listed in the table below.


Key Features


  • Void-less hermetically sealed glass package

  • Quadruple-layer passivation

  • Internal Category 1 metallurgical bonds

  • Ultrafast recovery 6 amp rectifier with working peak reverse voltages from 50 V to 150 V

  • High forward surge current capability

  • Low thermal resistance

  • Controlled avalanche with peak reverse power capability

  • Inherently radiation hardened

  • Power supply circuits

  • Military and space applications

  • Other applications requiring extremely fast switching and lower forward loss

The IN5811 is certified to the U.S. military specification MIL-PRF-19500/477, which defines the performance requirements for silicon, fast recovery, and power rectifier diodes. The specification provides four levels of product assurance (JAN, JANTX, JANTXV, and JANS) for each encapsulated device type.

IN5811: Maximum Ratings and Electrical Characteristics

The IN5811 datasheet includes important maximum ratings and electrical characteristics to ensure proper operation of the rectifier diode. It’s essential to guarantee that the component is not exposed to conditions outside its maximum ranges.

IN5811 maximum ratings

IN5811 Maximum Ratings

The IN5811 is an ultrafast recovery rectifier diode, and its electrical characteristics are listed below:

IN5811 electrical characteristics

IN5811 Electrical Characteristics

IN5811: Packaging

The IN5811 is available in both leaded and surface mount metal electrode leadless face (MELF) package configurations. From the IN5811 datasheet, the package dimensions of the rectifier diode are shown below.

IN5811 Package Dimensions

IN5811 Package Dimensions

IN5811 PCBA Design Essentials

The IN5811 is a versatile rectifier diode for high-reliability applications. However, some essentials must be adhered to for reliable operation and performance. It is crucial that you employ accurate schematic symbols, PCB footprints, and CAD models from a reliable source, as illustrated below.

If you’re looking for CAD models for common components or a 1N5811 datasheet, Ultra Librarian helps by compiling all your sourcing and CAD information in one place.

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