3SMBJ5926B-TP

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3SMBJ5926B-TP Application Field and Working Principle

The 3SMBJ5926B-TP (henceforth referred to as ‘device’) is a Zener diode in a SMBJ (or small-signal surface mount) package from Vishay Semiconductors. It is designed for use in the telecom and datacom fields, providing protection against a wide range of overvoltage occurrences. Its application field and working principle is described below.

Application Field

The device is a particularly small and efficient protector, making it suitable for use in a range of telecom and datacom applications. It can be used in a range of applications including, but not limited to:

• Telecommunication interfaces
• Broadband networks
• Sonet/SDH networks
• CATV and satellite networks
• Computer and peripheral electronics

Specifically, it is designed for use in applications where space is at a premium, and repeatable and reliable performance is required, such as Line Interface Units; and is suitable for use across a wide range of temperatures and operating voltages. The device is IEEE 802.3, IEC 60950, and TUV Rheinland approved, and is designed with a high degree of environmental and ESD robustness. It is capable of operating over the IEC 61000-4-2 and Telcordia GR-1089 standards, with a working range of 3V – 85V.

Working Principle

The device acts as a voltage clipper and protector when the voltage surpasses a pre-defined threshold (in this instance, 16V). When the voltage rises above the Zener breakdown voltage, the device increases its internal resistance, thus regulating and limiting the output of the circuit. The device is made up of two elements: a PN junction, and a Zener diode. The two elements result in a band-stop frequency response, providing protection from ESD voltage transients. Further, the device is specified to handle ESD voltages of up to 40kV.

Conclusion

The 3SMBJ5926B-TP is an impressive device from Vishay Semiconductors. It is designed for use in telecom and datacom applications, providing protection against a wide range of overvoltage occurrences, and is suitable for use across a wide range of temperatures and operating voltages. The device is IEEE 802.3, IEC 60950, and TUV Rheinland approved, and is capable of operating over the IEC 61000-4-2 and Telcordia GR-1089 standards. It is made up of two elements: a PN junction and a Zener diode, and is a valuable addition to the range of available protectors.

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