Part Number: CDSOT23-SM712

Manufacturer: Bourns

Description: ESD Suppressors / TVS Diodes SOT-23 7V400W Low Capacitance

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A TVS dual diode with the bidirectional operation and up to 30-kV ESD protection is the CDSOT23-SM712. Two protection pins and a common connection made of two back-to-back Zener diodes are present on the CDSOT23-SM712 chip. Depending on how the circuit is set up, the CDSOT23-SM712 can operate at a maximum operating voltage of either 7 V or 12 V with a maximum peak power dissipation of 400 W.

The CDSOT23-SM712’s maximum leakage current is 20 A. Depending on how the circuit is set up, its maximum clamping voltage ranges from 14 V to 26 V, and the CDSOT23-SM712 operates between -55°C and 150°C. The CDSOT23-SM712 has dimensions of 1.16 x 1.4 x 3 mm and is housed in a three-pin SOT-23 package.

CDSOT23-SM712 Features

  • RoHS compliant*
  • Features Working peak voltage of 7 V or 12 V
  • It has ESD protection of 30 kV max.
  • Features Surge protection

CDSOT23-SM712 Applications

  • Network protection
  • Wireless systems
  • Portable electronics
  • RS-485 port protection

CDSOT23-SM712 Manufacturer

Since being established in 1947 by Marlan and Rosemary Bourns, Inc. has been a pioneer in the design, production, and marketing of electronic components and integrated solutions. As a leader in his field, Bourns concentrates on product development in rapidly growing industries, such as computers, telecommunications, transportation, and portable electronics. In the early years of the Company’s existence, Bourns set a standard for the caliber, worth, and originality of its goods and services with the launch of the Trimpot® line in 1952.

This was the first trimming potentiometer ever to receive a patent. Due to Bourns’ dedication to excellence, its goods and services are constantly enhanced to satisfy customers’ demands around the globe. The Bourns business model is built on giving its international customers the best overall value while consistently delivering high-quality goods.

Frequently Asked Questions

What is a TVS Diode?

Transient voltage suppression diodes, also known as clamp diodes, are electronic safety components that can shield electrical equipment against spikes in voltage brought on by wires. It is a highly effective circuit protection device that is widely utilized around the world. Although it has the same appearance as regular diodes, it has a surge power absorption capacity of up to several kilowatts. When used in reverse, a large, high-energy pulse will cause its operating impedance to drop to a very low conduction value, allowing large currents to flow through while clamping the voltage to a predetermined level.

It can successfully safeguard the electronic circuit’s precision components with a response time of only 10–12 milliseconds. Under TA=250C and T=10ms, the TVS’s permissible forward surge current can range from 50 to 200A. Bidirectional TVS diodes can clamp the voltage to a predetermined level and absorb instantaneous big pulse power in both positive and negative directions. AC circuits benefit from bidirectional TVS, while DC circuits often use unidirectional TVS. It can be utilized for surge power absorption, anti-interference, lightning protection, overvoltage protection, and other purposes. It is the best kind of defense mechanism. Watts are used to express tolerance (W).

How Do TVS Diodes Work?

Numerous internal and external causes, as well as spikes and overvoltage events, might contribute to these problems. Transients can be challenging to forecast because their duration and intensity vary widely; some repeatedly occur, while others only once. Thus, TVS diodes are crucial components that you should use to safeguard your circuit against the threat of transients.

Normally, transient voltage suppressors are connected in series with the circuit. They can work to limit the voltage that can travel through a junction at any given time and filter current to safeguard the circuit. This is helpful if spikes do occur. The clamping action then reduces the voltage to a predetermined level and directs any excess voltage toward the ground and away from the circuit.

What is meant by transients?

Transients, brief spikes in voltage or current, can harm a circuit in various ways. Some transients are one-time events, whereas others are recurrent. These transients can last from a few nanoseconds to hundreds of milliseconds and range in voltage from a few millivolts to thousands of volts.

What causes Transients in a circuit?

A circuit’s internal or exterior connections both have the potential to produce transients. For instance, internal transients can be made by defective contacts in switches and connectors or by inductive load switching. It may produce on the outside due to inductive switching or lightning strikes.

TVS Diode Parameters

Numerous varieties of TVS diodes are available on the market, each created for a particular use. The following terms can be found in the datasheet of a TVS diode that best suits your design.

VR or reverse stand-off voltage: The highest voltage applied to the protector without turning it on is known as reverse stand-off voltage. The device VR should be at least as high as the protected circuit’s max operating voltage. To prevent the protective device from clipping the normal voltage required for circuit operation or signal transmission.

Breakdown Voltage (VBR): The Voltage at which a diode starts to protect and conduct current is known as the breakdown voltage. In most cases, 1mA is the VBR specification.

The protected circuit will be subjected to a maximum voltage during the test waveform event, known as the clamping voltage (VC). The clamping voltage is typically provided on datasheets for a 1A or 2A waveform with an 8S rise time.

Peak Pulse Current (IPP): The peak pulse current represents the highest current that a protective device can withstand.

What causes a TVS diode to fail?

If transient voltage suppressors are exposed to voltages or situations higher than what the specific device was intended to handle, they will malfunction. Open, Short, open, and degraded devices are the three failure types for the TVS.


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