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SM712: TVS Diode Array

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The SM712 TVS Diode Array is specifically designed to protect multi-point data transmission in standard RS-485 applications (-7V to 12V) from damage due to electrostatic discharge (ESD), electrical fast transients (EFT), and lightning induced surges. Breakdown and clamping voltage for SM712 is 13.3V and 26 V respectively.


Pin Configuration

Pin No.

Pin Name



I/O 1

First Input/Output Pin


I/O 2

Second Input/Output Pin



Ground Pin



  • Current - Peak Pulse : 17 A
  • Current Rating: 1µA
  • Working Voltage: 12 V
  • Breakdown Voltage: 13 V
  • Clamping Voltage: 26 V
  • Operating Temperature Range: -55 to 125 °C
  • Available in SOT-23 Package


Note: Complete Technical Details can be found at the SM712 datasheet given at the end of this page.


Alternative for SM712: AQ24CANA, SP1305


Other TVS Diode Arrays: AQ1003, AQ1005


Brief Note on SM712

The SM712 replaces four discrete components by integrating two 12V and two 7V TVS diodes in a single package. The four diode are connected in common anode format in two groups. This array design reduces voltage over-shoot associated with trace inductance. The low clamping voltage of SM712 minimizes the stress on the protected transceiver. Internal circuit diagram of SM712 is shown below.

SM712 Internal Circuit diagram


SM712 TVS array diode comes in 3-pin package in which two pins are input/output pins and third pin is ground pin. In SM712, SM is the series name, 712 is the operating voltage range. Marking diagram for SM712 is given below.

SM712 3 Pin Package



  • RS-485 tranceivers with extended common mode range
  • Security systems
  • Automatic Teller Machines
  • HFC systems
  • Networks


2D representation (SOT-23)

2D-representation of SM712

Component Datasheet

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