SMDB12/TR13

Current - Peak Pulse (10/1000µs):	5A (8/20µs)
Base Part Number:	SMDB12
Supplier Device Package:	8-SO
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 150°C (TJ)
Capacitance @ Frequency:	185pF @ 1MHz
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	300W
Series:	TVSarray™
Voltage - Clamping (Max) @ Ipp:	19V
Voltage - Breakdown (Min):	13.3V
Voltage - Reverse Standoff (Typ):	12V
Unidirectional Channels:	4
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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TVS-Diodes: SMDB12/TR13 Application Field and Working Principle

Transient Voltage Suppressor (TVS) diodes are primarily used to protect electronic devices from electrostatic discharge (ESD) and voltage spikes or transients. Transients can be caused by switching operations, lightning discharges, power line disturbances, or even generated internally due to relay or motor operations. TVS diodes limit the voltage to a safe level, allowing the transient to pass through the device while still protecting circuit components. SMDB12/TR13 TVS diodes are designed to protect against transients and surge pulses up to 600 W peak power dissipation in a variety of packages, including a variety of surface mount packages. These diodes can be used in both consumer and industrial applications. The two main parameters to consider when selecting a TVS/ESD diode are the breakdown voltage and the clamping voltage. This is important because it is typically the breakdown voltage that will determine the clamping voltage. The breakdown voltage is the applied voltage at which the diode begins to limit or clamp the transient that is applied across the diode. The clamping voltage is the maximum voltage that the diode allows to pass through across its terminals. The SMDB12/TR13 devices from Littelfuse have a breakdown voltage range of 5-25V and clamping voltage range of 8-29V, meaning they are suitable for a wide variety of applications. Other key features for this device include: Low junction capacitance for high frequency immunity, 600W peak power, and 6kV ESD immunity.In terms of working principle, the SMDB12/TR13 TVSs are designed to absorb transient energy when a high voltage pulse is applied across their terminals. The TVS diode is connected in series with the circuits, and is effectively an open circuit until the voltage across the diode exceeds the breakdown voltage (VBR). Once the breakdown voltage has been exceeded, the diode conducts and rapidly diverts energy away from the device being protected.The avalanche voltage is the voltage at which the diode becomes conductive and provides conduction current, and the clamping voltage is the amplitude of voltage that the diode will limit the transient to. In general, the higher the breakdown voltage of the diode, the higher the clamping voltage. By absorbing energy from a voltage transient, the TVS device ensures that the protected device remains undamaged by the transient. When the transient has dissipated, the diode voltage returns to its off-state.To ensure best performance, one should always read the datasheet for the SMDB12/TR13 TVS device and check that the breakdown voltage is sufficient to protect the device from ESD and voltage transients. In addition, consider the peak current capability of the device to ensure that it can handle the expected transients.In summary, the SMDB12/TR13 TVS diodes from Littelfuse are designed to protect against transients and surge pulses, and can handle a wide range of breakdown and clamping voltages for consumer and industrial applications. Key features of this TVS device include low junction capacitance for high frequency immunity, 600W peak power dissipation, and 6kV ESD immunity. When selecting a TVS/ESD diode, one should always read the datasheet and check for the proper breakdown voltage and peak current capability.

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