SMBJ20A/54

Current - Peak Pulse (10/1000µs):	18.5A
Base Part Number:	SMBJ
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:	600W
Series:	TransZorb®
Voltage - Clamping (Max) @ Ipp:	32.4V
Voltage - Breakdown (Min):	22.2V
Voltage - Reverse Standoff (Typ):	20V
Unidirectional Channels:	1
Type:	Zener
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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The SMBJ20A/54 is a TVS-Diodes that is designed to protect against voltage transients. It is provided in a standard DO-214AB package and uses glass passivated junctions. This unidirectional Transient Voltage Suppressor (TVS) device is an install-able component in circuit boards and thanks to its clamping voltage is ideal for ESD protection. The SMBJ20A/54 has a rated current of 2A, a maximum clamping voltage of 54V and a standoff voltage of 20V.

The SMBJ20A/54 is part of a larger range of TVS-Diodes that can be used for different protection solutions. According to its characteristics, the SMBJ20A/54 can usually be observed in applications that require transient voltage protection. These applications often use multiple voltage ranges in order to protect the electronics under the transient over-voltage conditions. This especially applies when dealing with electronic designs that may undergo rapid transitions. For example, situations that may do rapid circuit changes, high frequency operations, or fast edges can cause concerns regarding voltage surges and other transients that the SMBJ20A/54 can help prevent.

The SMBJ20A/54 has a wide variety of applications where it can help protect electronic components from high transient voltages, such as: consumer electronics, data/communications, automotive, lighting, motor control, power supplies, and set-top boxes. It can also be used in any application where high energy transient over-voltages are a concern, such as industrial equipment, indoors and outdoors systems, military systems and applications, HVAC, and aerospace applications.

The working principle of the SMBJ20A/54 is simple – its clamping voltage helps limit the transient over-voltage and provides a stable working environment, ensuring that no considerable voltage spikes are present to disrupt the normal working of the circuit. The SMBJ20A/54 is able to combine low capacitance, low leakage current, and response time to ensure that even with fast edge rates, the circuit may still function properly. It also has a variety of other features such as very low junction capacitance, wide operating temperature range (from -65°C to 150°C), and transients up to peak pulse current 10KA.

In order to ensure proper performance, the mounted position must be taken into account when using the SMBJ20A/54. It is better to mount the device on an even surface, away from objects and other components, in order to achieve correct operation. In addition, the parts’ mounting side must be carefully considered. Depending on the application, some form of mechanical advantages may need to be taken into account when mounting the SMBJ20A/54, in order to use the entire scope of the Transient Voltage Suppressor.

The SMBJ20A/54 is an ideal choice for projects that need protection from high-voltage transients. Its low breakdown voltage, low clamping voltage, and excellent thermal performance makes it a preferred choice for many consumer, automotive, and industrial applications.

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