onsemi MUR180ERLG Ultrafast Rectifier: Datasheet, Pinout, and Application Circuits

The MUR180ERLG from onsemi is a high-efficiency ultrafast rectifier diode designed for high-frequency power conversion applications. As part of the esteemed MUR series, this component is engineered to deliver superior performance in circuits where rapid switching and low reverse recovery time are critical. This article provides a detailed overview of its datasheet specifications, pinout configuration, and typical application circuits.

Datasheet Overview and Key Specifications

The MUR180ERLG is characterized by its ultrafast recovery time, which is crucial for minimizing switching losses in high-frequency operations. Key electrical specifications include:

- Repetitive Peak Reverse Voltage (VRRM): 800 V

- Average Forward Rectified Current (IO): 1.5 A at a case temperature of 100°C

- Peak Forward Surge Current (IFSM): 50 A for a single half-sine wave

- Reverse Recovery Time (trr): 35 ns (typical), ensuring efficient operation in fast-switching environments

- Low Forward Voltage Drop (VF): Typically 0.95 V at 1.5 A, enhancing energy efficiency

The device is housed in a DO-41 package, which is widely used for its robustness and ease of mounting. Its operational and storage junction temperature range spans from -65°C to +175°C, making it suitable for a broad spectrum of industrial environments.

Pinout Configuration

The MUR180ERLG features a standard axial-leaded package (DO-41) with two pins. The pinout is straightforward:

- Anode (A): Identified by the positive terminal, typically marked with a band or a plus sign on the diode body.

- Cathode (K): The negative terminal, usually indicated by the opposite end without marking.

Correct polarity is essential during installation to prevent device failure and ensure circuit integrity.

Application Circuits

The MUR180ERLG is predominantly used in high-frequency inverters, switch-mode power supplies (SMPS), and freewheeling diode applications. Its ultrafast recovery特性 makes it ideal for snubber circuits and reverse battery protection. Below are two common application scenarios:

1. Freewheeling Diode in SMPS:

In a flyback or boost converter, the diode is placed across the inductive load to provide a path for current when the switch turns off, protecting the circuit from voltage spikes and improving efficiency.

2. Snubber Circuit:

Connected in parallel with a switching transistor, it clamps voltage transients and reduces ringing, thereby enhancing reliability and minimizing electromagnetic interference (EMI).

ICGOOODFIND Summary

The onsemi MUR180ERLG Ultrafast Rectifier stands out for its high voltage capability, rapid switching speed, and robust construction. It is an excellent choice for designers seeking to optimize performance in power supply designs, motor drives, and other high-frequency applications where efficiency and reliability are paramount.

Keywords: Ultrafast Rectifier, Switch-Mode Power Supply, Reverse Recovery Time, Freewheeling Diode, High-Frequency Inverter