SMBJ40CA-Q

Current - Peak Pulse (10/1000µs):	9.3A
Supplier Device Package:	SMB (DO-214AA)
Package / Case:	DO-214AA, SMB
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 150°C (TJ)
Capacitance @ Frequency:	--
Applications:	Automotive
Power Line Protection:	No
Power - Peak Pulse:	600W
Series:	Automotive, AEC-Q101, SMBJ
Voltage - Clamping (Max) @ Ipp:	64.5V
Voltage - Breakdown (Min):	44.4V
Voltage - Reverse Standoff (Typ):	40V
Bidirectional Channels:	1
Type:	Zener
Lead Free Status / RoHS Status:	--
Part Status:	Active

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Introduction

Transient Voltage Suppression Diodes (TVS) are integrated circuit devices that protect electronic circuits from Voltage Transient, electrical discharges, surges, and overvoltage conditions. The SMBJ40CA-Q is a unidirectional type voltage-suppressing diode made up of both a PN and a NPN semiconductor junction diode. It protects user\'s delicate electronic systems from voltage transients and ESD (electrostatic discharge).

The Working Principle of the SMBJ40CA-Q TVS - Diode

A Transient Specialty Diode like the SMBJ40CA-Q is a sensitive device equipment for protecting your delicate electronic systems from voltage transients and ESD (electrostatic discharge). It can improve the device\'s electrical performance and resistance to adverse voltage conditions. The SMBJ40CA-Q has two specially proportioned PNs and a single NPN junction diode assembly, which work together to protect the electronic systems from voltage transients and ESDs. The PN junction diodes are proportioned differently, with the NPN junction diode positioned in between the two PNs positions. There is also an unique screening method which denotes the type and capability of the device. The SMBJ40CA-Q uses binary screening, which means it applies a multiple screening method to the component to identify its capability. When subjected to voltage transients or ESD, SMBJ40CA-Q will immediately activate its NPN semiconductor junction diode which quenches the electrical charge, and thus providing protection to the delicate electronic system from voltage transients and ESDs. However, depending on the levels of its ESD and voltage transients, the NPN will eventually become saturated or burnt if the currents remain too high. In this case, the propagation delay is extended and may cause the NPN diode to become completely non-functional and may cause permanent damage.

Application fields of the SMBJ40CA-Q

The SMBJ40CA-Q is broadly used in many electronic equipment and instrument, such as optical transceivers, in-dash navigation systems, medical electronics, LED lighting, industrial control equipments, computers, consumer electronics, and so on. The SMBJ40CA-Q can provide reliable overvoltage protection for applications such as automobile Electronic Control Units, smart meters, PCs and tablets, notebooks, telecommunication equipment and more.Moreover, the SMBJ40CA-Q can provide reliable protection for wireless routers and devices, LCD and flat-panel displays, USB storage devices, digital video recorders and many other devices that are subject to ESD, electrical discharges, transients, overvoltage, or any other electrical performance degradation.

Conclusion

In conclusion, the SMBJ40CA-Q is a unidirectional type voltage-suppressing diode, which has two specifically proportioned PN junctions and a single NPN junction diode assembly. It can provide reliable overvoltage protection for many electronic equipments and instruments. With its great protection abilities, the SMBJ40CA-Q is widely used in the automotive industry, medical electronics, LED lighting, consumer electronics and so on.

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