MMBZ27VCL-7-F

The MMBZ27VCL-7-F is a TVS (transient voltage suppressor) diode that is optimizing protection against transients from ESD or EFT. Using this diode in appropriate application fields can help with safety, reliability, and performance of a circuit.

Application Fields

The MMBZ27VCL-7-F is designed for protection of sensitive electronic components. It is especially suited for applications which require the protection of data lines as it offers high ESD robustness. It can be used for handheld devices such as mobile phones, PDAs, computers, and any other portable electronic devices.

The diode also can be used for other applications that require transient voltage suppression. It can be used for offline AC/DC power supplies, automotive applications, and general industrial systems that require protection against transients.

Working Principle

The MMBZ27VCL-7-F is a diode which blocks high excessive voltages that are hazardous to the connected circuit. The diode works putting in an avalanche condition a specially designed Zener diode placed in series with an avalanche diode connected in reverse direction.

When the diode is subjected to a voltage higher than its datasheet specified stand-off voltage, it moves from the Zener region into the avalanche region, an avalanche multiplication effect occurs in the Zener diode, thereby providing a sufficient current to form an avalanche in the reverse biased diode. This balances the diode\'s threshold voltage and creates a balast current that will flow towards the surge source.

Having a continuous ESD robustness up to 27.5 kV (HBM, human body model) and 8.5 kV (MM, machine model) makes the diode a great choice for data lines protection. Moreover, the diode has a low reverse leakage current (10-100nA) and relatively high power capacity between 500mW and 1.2W. All these features make the diode suitable for use in a wide variety of applications.

Conclusion

The MMBZ27VCL-7-F is a TVS diode particularly well suited for applications which require the protection of data lines. It offers continuous ESD robustness up to 27.5 kV (HBM) and 8.5 kV (MM). The diode works by putting in an avalanche condition a Zener diode placed in series with an avalanche diode, thus blocking high excessive voltages. Also, it has a low reverse leakage current and a high power capacity. Finally, its features make it suitable for being used in a variety of application fields such as handheld devices, offline AC/DC power supplies, automotive applications, and general industrial systems.