What is a TVS array?
TVS Diode Arrays (SPA devices) Protect electronics from fast and damaging voltage transients, such as lightning and electrostatic discharge (ESD) — Littelfuse TVS Diode Arrays offer an ideal protection solution for I/O interfaces and digital and analog signal lines.
What are TVS diodes used for?
TVS Diodes are used to protect semiconductor components from high-voltage transients. Their p-n junctions have a larger cross-sectional area than those of a normal diode, allowing them to conduct large currents to ground without sustaining damage.
Is a TVS diode necessary?
As a result, TVS diodes are essential devices you should use to protect your circuit from the risk of transients. Transient Voltage suppressors are typically placed in parallel with the circuit.
What is the difference between TVS and ESD diode?
TVS diodes are particularly efficient in countering medium-voltage high-energy pulses that last milliseconds, in comparison to ESD protection devices which address higher voltage pulses of lower energy and shorter duration.
How does bidirectional TV diode work?
A bidirectional device typically has a symmetrical VBR for both positive and negative voltages. Diode arrays can be connected to a positive and negative power supply to create a bidirectional device; however, most applications connect the bottom diode to ground which forms a unidirectional device.
What is ESD diode?
A TVS diode (ESD protection diode) is a kind of Zener diode. It is a diode that is mainly used for static electricity (ESD) countermeasures. It protects integrated circuits and others from high-voltage ESD entering from a USB line etc.
Where do you put a TV diode?
Place TVS diode near the edge of the PCB. To enable the excessive surge current to be channeled to chassis ground before damaging the transceiver, the placement of the TVS diode is also important. It is a good practice to place TVS diodes as close to the edge of the board as possible.
What causes a TVS diode to fail?
By nature, a TVS device will fail when subjected to a transient beyond its designed capability. If the circuit or system is not properly fused, a shorted TVS device can become a safety hazard conducting operating currents through the return path.
Where should a TVS diode be placed?
What is TVS diode working voltage?
Commonly, 4/20 mA input terminals have a nominal voltage of 24 V, with a maximum DC voltage tolerance of 33 V. Any TVS diode selected must have a VRWM of 33 V or greater to enable this operation. There are many options for TVS diodes that meet this requirement.
Are TVS diodes Zener?
One common misconception is that TVS diodes and Zener diodes are the same thing, and I often hear TVS diodes referred to as “Zeners”. TVS diodes and Zener diodes are engineered for very different applications. Zener diodes are designed to regulate voltage and therefore operate in the breakdown region (Figure 2).
Does TVS diode have polarity?
TVS diode classification: TVS devices can be divided into unipolar and bipolar according to their polarities. According to their applications, they can be divided into general-purpose devices and special-purpose devices suitable for various circuits.
All the TVS arrays provide protection from transients caused by Electrostatic Discharge (ESD) as defined in :IEC 61000-4-2 and also protection against Electrical Fast Transients as defined in IEC 61000-4-4. They also provide some secondary lightning protection. Micronote 103 – What is a TVS?
What are TVS diode arrays?
Protect electronics from fast and damaging voltage transients, such as lightning and electrostatic discharge (ESD) — Littelfuse TVS Diode Arrays offer an ideal protection solution for I/O interfaces and digital and analog signal lines. Find the TVS Diode Arrays you’re looking for by browsing our products below.
What is the protection provided by the TVS arrays?
All the TVS arrays provide protection from transients caused by Electrostatic Discharge (ESD) as defined in :IEC 61000-4-2 and also protection against Electrical Fast Transients as defined in IEC 61000-4-4. They also provide some secondary lightning protection.
Which TVS diode arrays are best for EFT protection?
Littelfuse TVS Diode Arrays offer a high level of protection (up to 30kV per IEC 61000-4-2) with very low capacitance, leakage current and clamp voltage. For more robust applications, SP03-xx and SP30xx devices are available for EFT and Lightning transient threats per IEC 61000-4-4/5.