SMB10J28A-M3/5B Circuit Protection

Voltage - Clamping (Max) @ Ipp:	45.4V
Supplier Device Package:	DO-214AA (SMBJ)
Package / Case:	DO-214AA, SMB
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 150°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	1000W (1kW)
Current - Peak Pulse (10/1000µs):	22A
Series:	TransZorb®
Voltage - Breakdown (Min):	31.1V
Voltage - Reverse Standoff (Typ):	28V
Unidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Introduction to SMB10J28A-M3/5B TVS Diodes

The SMB10J28A-M3/5B is a transient voltage suppressor (TVS) diode, typically used in telecommunications, datacom, and computer and consumer applications. It has two main operational characteristics, the maximum peak pulse power and the breakdown voltage. The maximum peak pulse power (maximum non-repetitive peak current), expressed in watts, is the value of electrical power that can be dissipated in the TVS diode during the course of short-duration, high-speed switching or high-voltage transient pulses. It is generally specified with a higher rating than continuous rated power, which accounts for the diode\'s ability to absorb transient electrical energy. The breakdown voltage is the maximum reverse voltage a specific TVS diode can withstand without experiencing a breakdown or short circuit.

SMB10J28A-M3/5B Applications

The SMB10J28A-M3/5B is ideal for broadcast and recording applications where often a high degree of surge protection is required. Its low differential forward resistance ensures that signal integrity is not compromised. Common applications for this diode include:

• Broadcasting systems
• Computers and consumer electronics
• Communication systems
• Data processing equipment
• Telecommunications
• Test and measurement instruments

Operation of SMB10J28A-M3/5B

The SMB10J28A-M3/5B is a two-terminal protective device, featuring a breakdown voltage of 28V and a maximum non-repetitive peak pulse current rating of 10A. The characteristic impedance of this diode is typically around 50Ω over the frequency range from DC to MHz. The low differential forward resistance ensures that signal integrity is not compromised. The diode contains a specially designed Zener network that enables the diode to withstand repetitive breakdown voltages in excess of the absolute maximum breakdown voltage. When normal operating voltage is applied to one terminal and a reverse voltage of greater than 28V is applied to the other, the diode will conduct current through a low-impedance path due to the Zener junction and protect all components from the harmful voltage spike. As soon as the overvoltage condition no longer exists, the diode will stop conducting current and protect the system from being exposed to the transient voltage.

Conclusion

The SMB10J28A-M3/5B TVS diode is designed for use in broadcast and recording applications where a high degree of surge protection is required. With its low differential forward resistance and maximum non-repetitive current rating of 10A, it offers a reliable and efficient means of protecting components from voltage surges.

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