SMCJ45ATR

Voltage - Clamping (Max) @ Ipp:	72.7V
Supplier Device Package:	SMC (DO-214AB)
Package / Case:	DO-214AB, SMC
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 150°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	1500W (1.5kW)
Current - Peak Pulse (10/1000µs):	20.6A
Series:	--
Voltage - Breakdown (Min):	50V
Voltage - Reverse Standoff (Typ):	45V
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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SMCJ45ATR is a type of Transient Voltage Suppression diode in a small and extremely robust package. These diodes are suitable for protecting sensitive electronic equipment from overloads of up to 20A, and operate with a fast response time.SMCJ45ATR are commonly used in automotive, military, medical, communications, consumer electronic devices, and many other fields as overvoltage protection. They are frequently found in mobile phones, digital cameras, personal computers, and laptop computers. Transient Voltage Suppression (TVS) diodes are the most common type of overvoltage protection devices, offering protection against sudden spikes in voltage, or transients, that can damage sensitive electronic circuits. TVS diodes are designed to clamps voltages at a preset level, steering damaging high voltages away from sensitive circuits. This kind of protective device is used in many applications where the environment may require protection from external transients, or in general protection of electrical and electronic circuits.The SMCJ45ATR device is composed of a silicon avalanche diode connected between the two terminals of a nonpolarized capacitor. The diode is connected in such a way that when a sufficiently high voltage is applied across the two terminals, the diode will conduct, allowing current to flow from one terminal to the other, and the capacitor will start to charge. As the capacitor charges, the voltage across the diode will reduce, and eventually reach a point where the current stops flowing.When the voltage drops below the protection limit of the device, the diode turns off, and the capacitor quickly discharges. This discharge of current forms a protective \'spark gap\' across the terminals of the device.The purpose of the SMCJ45ATR is to protect electronic circuits from sudden overvoltages that could otherwise cause serious damage. The device is designed to allow a current flow that is sufficient to protect the circuit from any destructive voltage impacts, and then turn off quickly to prevent any further current flow.The primary function of the SMCJ45ATR is to clamp and absorb incoming transients. As the voltage across the device rises above the power limit, the diode will begin to conduct, and voltage will be drawn away from the circuit, thus protecting it. During times of extreme overvoltage, the device can also act to reduce the rate of voltage rise of the incoming waveform, thus giving additional protection to the circuit.SMCJ45ATR devices are extremely robust and reliable in their operation, and offer a high level of performance and protection from transient voltages. The device provides fast response times, and is compatible with surface mount technology. The device is often used in situations where the protection level must be maintained for long periods of time, or in environments that are subject to high levels of EMI, and can provide a vital measure of protection against costly equipment failures.

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