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SM6T18A on a board, in 3D

SM6T18A

STMicroelectronics

-55℃~+150℃ 123A@8/20us 17.1V 18V 200nA 32.5V 4kW@8/20us IEC 61000-4-2、IEC 61000-4-5 TVS Unidirectional SMB(DO-214AA) ESD and Surge Protection (TVS/ESD) ROHS

Extended
DatasheetJLCPCBLCSCst/SM6T18A
Category
ESD And Surge Protection (TVS, ESD)
Package
SMB(DO-214AA)
Pins
2

Overview

The SM6T18A is an ESD And Surge Protection made by STMicroelectronics in a SMB(DO-214AA) package with 2 pins. -55℃~+150℃ 123A@8/20us 17.1V 18V 200nA 32.5V 4kW@8/20us IEC 61000-4-2、IEC 61000-4-5 TVS Unidirectional SMB(DO-214AA) ESD and Surge Protection (TVS/ESD) ROHS.

PCBKit's library has its KiCad symbol (Diode:SM6T18A, from KiCad's library) and its footprint (Diode_SMD:D_SMB, from KiCad's library), ready for a KiCad board. 4,928 are in stock at JLCPCB (part C21154). 6 open-source boards in 6 repositories on GitHub use it.

Symbol

Diode:SM6T18AFrom KiCad's library

Footprint

12
Diode_SMD:D_SMBFrom KiCad's library

Parameters

11
Clamping Voltage
32.5V
Number of Channels
Single-channel
Operating Temperature
-55℃~+150℃
Peak Pulse Current (Ipp)
123A@8/20us
Peak Pulse Power Dissipation (Ppp)
4kW@8/20us
Polarity
Unidirectional
Reverse Leakage Current (Ir)
200nA
Reverse Stand-Off Voltage (Vrwm)
15.3V
Type
TVS
Voltage - Breakdown
18V
level of protection
IEC 61000-4-5

Order codes

1

Pinout

2
The pins of the SM6T18A
PinNameType
1A1Passive
2A2Passive

Open-source boards using it

All 6
  • 2 layers82 × 82 mmFtduino32, the printed circuit board in 3D

    Ftduino32

    harbaum/ftduino32

    ESP32 based variant of the ftDuino

    157 parts5
  • 2 layersSTM32CAN, the printed circuit board in 3D

    STM32CAN

    witoldo7/STM32CAN

    Trionic 5, 7, 8 flasher interface.

    50 parts5Apache-2.0
  • 2 layers53.8 × 53.1 mmObd32, the printed circuit board in 3D

    Obd32

    mkrasselt1/obd32

    Anyone is free to join our goal to make the hardware reliable and affordable.

    79 parts4
  • 4 layers64 × 41 mmExternal, the printed circuit board in 3D

    External

    agalakhov/klingel-external

    64 parts
  • 2 layers99.6 × 69.6 mmRGBW Lampe, the printed circuit board in 3D

    RGBW Lampe

    martinclausen2/RGBW-Lampe

    The "RGBW-Lampe" projects allows to create full color lighting appliances.

    162 parts
  • 2 layers48.3 × 20.3 mmDigital kicad, the printed circuit board in 3D

    Digital kicad

    n0ll0/skeemitehnika-projekt-2025

    This repository contains the project files for the Skeemitehnika G11 course project "Arduino Nano digisisendi laiendus" & at TTÜ.

    25 parts

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A picture that opens the part, for a README
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Questions

Is there a KiCad symbol and footprint for the SM6T18A?

Yes. The symbol is Diode:SM6T18A and the footprint Diode_SMD:D_SMB, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the SM6T18A?

SMB(DO-214AA), with 2 pins. Its footprint is drawn on this page.

Where is the SM6T18A datasheet?

STMicroelectronics publishes it: the Datasheet link on this page opens it.

Where can I order the SM6T18A?

JLCPCB lists it as part C21154, with 4,928 in stock; the sellers' links on this page open their listings.

What can replace the SM6T18A?

Parts like it in the library: the P6SMB18A by LGE, the P6SMB18CA by hongjiacheng, the P6SMB18CA by Littelfuse and the SM6T18CA by STMicroelectronics. Check their datasheets: a part that fits the footprint may still differ in its ratings.

Which open-source boards use the SM6T18A?

6 boards in 6 repositories on GitHub; the most starred are listed on this page, with their KiCad files.

Parts like it

8