onsemi MUR1620CTRG Ultrafast Rectifier: Datasheet, Pinout, and Application Circuits

The MUR1620CTRG from onsemi is a high-efficiency, ultra-fast rectifier designed for high-frequency power conversion applications. Housed in a durable TO-220AB package, this rectifier is part of a series known for its ultra-fast recovery time and high current capability, making it suitable for demanding environments like switch-mode power supplies (SMPS), inverters, and freewheeling diodes.

Datasheet Overview

Key specifications outlined in the datasheet include:

- Average Forward Current: 16A

- Peak Repetitive Reverse Voltage: 200V

- Forward Voltage Drop: 0.975V (typical) at 8A

- Reverse Recovery Time: 35ns (typical)

- Maximum Junction Temperature: 175°C

These parameters highlight the device’s ability to handle high surge currents while minimizing switching losses, a critical feature in modern power electronics where efficiency and thermal management are priorities.

Pinout Configuration

The MUR1620CTRG is a center-tap dual common-cathode rectifier. The TO-220AB package has three pins:

1. Pin 1 (Left): Anode 1

2. Pin 2 (Center): Common Cathode

3. Pin 3 (Right): Anode 2

This configuration allows the device to be used in full-wave rectifier circuits without requiring two separate diodes, simplifying board layout and improving thermal performance.

Application Circuits

1. Switch-Mode Power Supply (SMPS):

In SMPS designs, the MUR1620CTRG is often used in the output rectification stage. Its fast recovery time reduces ringing and electromagnetic interference (EMI), leading to cleaner power delivery and higher efficiency.

2. Freewheeling Diode in Inverters:

In motor drive or inverter circuits, the diode acts as a freewheeling component to protect switching transistors (like MOSFETs or IGBTs) from voltage spikes by providing a path for inductive load current.

3. Bridge Rectifier Configuration:

While typically used as a dual rectifier, two MUR1620CTRG units can be configured into a bridge rectifier for AC-to-DC conversion in high-current applications.

Thermal and Layout Considerations

To maximize performance, ensure proper heatsinking. The TO-220AB package allows direct mounting to a heatsink, reducing thermal resistance. PCB layout should minimize loop inductance to avoid voltage overshoot.

ICGOODFIND: The onsemi MUR1620CTRG stands out for its robust performance in high-frequency circuits, combining high current handling with ultra-fast switching. Its common-cathode design offers flexibility and integration benefits for compact power systems.

Keywords: Ultrafast Rectifier, High Current Rectification, Switch-Mode Power Supply, Freewheeling Diode, Common Cathode