SMDJ51A Circuit Protection

Voltage - Clamping (Max) @ Ipp:	82.4V
Supplier Device Package:	DO-214AB (SMCJ)
Package / Case:	DO-214AB, SMC
Mounting Type:	Surface Mount
Operating Temperature:	-65°C ~ 150°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	3000W (3kW)
Current - Peak Pulse (10/1000µs):	36.4A
Series:	SMDJ
Voltage - Breakdown (Min):	56.7V
Voltage - Reverse Standoff (Typ):	51V
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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TVS - Diodes

Transient voltage suppressors (TVS) are a very important component in electric and electronic circuit due to their capability to protect against overvoltage transients and electrical stress. They can also protect against potential ESD and EFT by allowing a path of least resistance, thus preventing damage to components in a circuit. One type of TVS, namely SMDJ51A, has specific application fields and working principles that distinguish it from other TVS devices. SMDJ51A is a type of thyristor (or bilateral) transient voltage suppressor diode designed to protect circuits from transients. It can handle peak pulse power (ITP) of up to 400 W and peak pulse current (IPP) of up to 1.6 A. This allows SMDJ51A to protect a wide range of applications, from power supplies and high-leg systems to low-speed and sensitive circuits. SMDJ51A has two protection methods, namely peak pulse clamping and avalanche breakdown. Peak pulse clamping occurs when a transient waveform exceeds the breakover voltage of the TVS, causing current to travel in two directions. This current clamps the voltage and dissipates the surge energy, resulting in limited ringing. Avalanche breakdown, on the other hand, occurs when the voltage across the device exceeds the avalanche voltage; current then flows in only one direction due to strong electrostatic charging. This current dissipates the surge energy and isolates the transient from the protected component. The combination of these two protection methods makes SMDJ51A an excellent choice for protection against a wide range of overvoltage and transient events.The low clamping voltage of SMDJ51A also makes it well suited for applications where low voltages may be present, such as automotive and portable electronics. Additionally, its low capacitance and turn-on time make it well suited for high-speed circuits, such as those found in modern telecom, datacom, and broadcast systems.SMDJ51A is an ideal choice for devices designed to protect against overvoltages and transients. Its dual protection mechanisms, low clamping voltage, and fast turn-on time make it an excellent choice for a wide range of applications. Thus, SMDJ51A can provide reliable protection against a wide range of overvoltage and transient events.

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