SMBJ5367C/TR13

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Diodes – Zener - Single: SMBJ5367C/TR13 Application Field and Working Principle

The SMBJ5367C/TR13 is a medium power surge suppression device for single-phase use in general-purpose AC/DC applications. It is part of Diodes Inc.’s growing family of Zener-based protection devices, which also includes the SMBJ5393C/TR13 and SMBJ5391C/TR13 series. This device provides a highly effective, low-cost solution for meeting the IEC 61000-4-5 8/20μs surge suppression requirements for AC power lines.

Application Field

The SMBJ5367C/TR13 is ideal for use in the following applications:

• AC line filters
• AC/DC adapters
• AC motors
• DC power supplies
• UPS and inverters
• Telecommunication and network equipment
• Industrial automation systems

This device can also be used in a variety of non-industrial applications due to its small size, low cost, and excellent surge protection capabilities.

Working Principle

The SMBJ5367C/TR13 utilizes a Zener diode based suppression technology for the primary protection element. This type of protection works by absorbing and dissipating surge transients that are greater than the breakdown voltage (VRWM) of the Zener diode. The device also has an NTC thermistor to provide additional thermal protection, ensuring that it does not become damaged from high inrush currents or prolonged exposure to elevated temperatures.

The Zener diode has a reverse-biased breakdown voltage that is specified at 5.8V, allowing it to effectively protect circuits against high voltage transients. The capacitance acts as a filter and helps to suppress high-frequency noise that can cause EMI/RFI interference and instability in the circuit. Additionally, the device has an integrated fuse element that provides short-circuit and overload protection.

The SMBJ5367C/TR13 also offers excellent surge protection performance, with an 8/20μs surge current rating of 1.5 kA (10/1000μs). This device is capable of handling both AC and DC transients, making it an ideal choice for AC/DC power line applications.

In summary, the SMBJ5367C/TR13 provides a highly effective, low-cost solution for surge protection on AC/DC power lines. Its small size, high performance, and wide operating temperature range make it suitable for a variety of applications.

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