SZMMBZ4252T1G

Current - Peak Pulse (10/1000µs):	--
Supplier Device Package:	SOT-23-3 (TO-236)
Package / Case:	TO-236-3, SC-59, SOT-23-3
Mounting Type:	Surface Mount
Operating Temperature:	--
Capacitance @ Frequency:	--
Applications:	Automotive
Power Line Protection:	--
Power - Peak Pulse:	--
Series:	Automotive, AEC-Q101
Voltage - Clamping (Max) @ Ipp:	--
Voltage - Breakdown (Min):	--
Voltage - Reverse Standoff (Typ):	--
Type:	--
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Introduction

SZMMBZ4252T1G is a type of transient voltage suppression diodes (TVS), specifically designed to protect sensitive electronic components from transient over-voltage events – often the result of electrical charging or discharging. To prevent damage from such events, SZMMBZ4252T1G is designed to divert excess current away from sensitive components.TVS diodes like SZMMBZ4252T1G are one of the most common types of over-voltage protection, and are used in an array of electronics equipment, including telecommunications systems, computers, consumer electronics, appliances, automotive, and industrial applications.

Applications

SZMMBZ4252T1G is well suited for a range of discrete, discrete+bus bar, and bus bar applications. The TVS diode offers a peak pulse current of 28A (10/1000 μs), a peak pulse power of 720W (10/1000 μs), and a clamping voltage of 19.6V.SZMMBZ4252T1G is used commonly in protecting low voltage systems, such as RS232 and RS485 ports, providing protection against working dust and moisture as well as accidental contact with wet or dry objects.It can also be used in protecting automotive applications such as radios, instrument clusters, windshield defrosters, airbags, and power supply systems. In communications systems, it helps protect against powerful lightning strikes and other environmental events.

Working Principle

TVS diodes work by inhibiting destructive power surges. They are designed to lower the voltage and divert the current away from the protected device. When an incoming surge has a voltage or current beyond the TVS diode’s specification, it will ‘clamp’ the voltage and dissipate the excess energy into the ground.The TVS diode itself features a special construction, with several areas featuring various junctions that create voltage clamps. The breakdown and clamping occur fast, in less than 1 nanosecond, which is enough to protect sensitive electronics.Once the surge has been dissipated, the TVS diode returns to its non-conductive state and the circuit is restored. The most common type of TVS diode is the ‘shunt’ type. These diodes are typically off, and remain so until an over-voltage event is detected.

Conclusion

TVS diodes, such as SZMMBZ4252T1G, are used for providing protection against incoming over-voltage events. This type of diode features a unique construction consisting of several junctions coupled to a ‘shunt’ that clamps the incoming voltage, and can handle a peak pulse current of 28A (10/1000 μs) and peak power of 720W (10/1000 μs). SZMMBZ4252T1G is used in a range of applications, including RS232 and RS485 ports, automotive, and communication systems, primarily for protecting sensitive electronic components from transient over-voltage events.

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