# ESDA18-1K (Component)
## Description
The ESDA18-1K is a transient voltage suppression and electrostatic discharge protection device designed to protect sensitive electronic circuits from ESD events, surge transients, and electrical overstress conditions. Manufactured by STMicroelectronics and commonly used in communication and embedded electronic systems, this device provides fast-response protection for signal lines and low-voltage interfaces exposed to external electrical disturbances.
The component utilizes low-capacitance TVS diode technology to clamp transient voltages while maintaining signal integrity on high-speed communication lines. It is optimized for protecting USB interfaces, GPIO lines, communication ports, sensor interfaces, and portable electronic devices from electrostatic discharge damage and transient spikes.
The ESDA18-1K is widely used in industrial electronics, consumer devices, embedded systems, communication hardware, and portable equipment requiring compact and reliable ESD suppression. Its small surface-mount package enables easy integration into high-density PCB layouts while improving overall system reliability and EMC robustness.
Engineering Specification
Device Type
Transient voltage suppression and ESD protection diode
Protection Function
Electrostatic discharge and surge transient suppression
Protection Architecture
Single-line TVS protection structure
Response Characteristics
Fast transient clamping response
Signal Compatibility
Suitable for low-voltage and high-speed signal interfaces
Capacitance Characteristics
Low capacitance for minimal signal distortion
Electrical Performance
Low leakage current and stable clamping behavior
Reliability Features
High ESD robustness and transient tolerance
Mounting Style
Surface mount technology
Package Type
Compact SOD-style surface-mount package
Thermal Characteristics
Low-power passive protection structure
EMC Features
Enhanced electromagnetic compatibility protection support
Applications
USB interface protection
GPIO protection
Communication interfaces
Embedded systems
Portable electronics
Industrial control hardware
Sensor interfaces
Consumer electronics
Signal line protection
Data communication systems
Manufacturer
STMicroelectronics
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## Component Details
- **Owner:** lcsc
- **Created:** 11/1/2024
- **Last Updated:** 5/28/2026
- **Visibility:** Public
- **LCSC Part Number:** C2935156
- **Manufacturer Name:** ST(意法半导体)
- **Datasheet URL:** https://www.st.com/resource/en/datasheet/cd00283838.pdf
- **Manufacturer Part Number:** ESDA18-1K
- **Part Type:** ESD Protection Devices
- **Package or Case Code:** SOD-523_L1.2-W0.8-LS1.6-RD-1
- **JLCPCB Part Class:** Extended Part
- **Used in:** 73 projects
## Distributor Pricing (qty 1)
*Pricing shown for quantity 1. For price breaks and other quantities, open in Flux.*
| Distributor | Unit Price (qty 1) | Stock |
|------------|--------------------|-------|
| [Arrow](https://www.arrow.com/en/products/esda18-1k/stmicroelectronics?utm_currency=USD®ion=nac) | $0.1224 | 647 |
| [Digi-Key](https://www.digikey.com/en/products/detail/stmicroelectronics/ESDA18-1K/2440267) | N/A | N/A |
| [HQonline](https://www.hqonline.com/product-detail/esd-suppressor---tvs-diodes-st-esda18-1k-2500389754) | N/A | N/A |
| [LCSC](https://www.lcsc.com/product-detail/C2935156.html) | N/A | N/A |
| [Mouser](https://www.mouser.com/ProductDetail/STMicroelectronics/ESDA18-1K?qs=raAh8RbVwI7pG6%2FatW9xFg%3D%3D) | N/A | N/A |
| [TME](https://www.tme.com/us/en-us/katalog/?queryPhrase=ESDA18-1K) | $0.33 | 3K |
| [Verical](https://www.verical.com/pd/stmicroelectronics-esd-supressors-ESDA18-1K-249500) | N/A | N/A |
- **Part Type:** Circuit Protection Devices
- **Manufacturer:** STMicroelectronics
- **MPN:** ESDA18-1K
- **Mount Type:** Surface Mount
- **Package / Case Code:** SO
- **Pin Count:** 2
## Pins
| Pin | Name | Type |
|-----|------|------|
| 1 | K | |
| 2 | A | |
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*Generated from [https://www.flux.ai/lcsc/esda18-1k~m10y](https://www.flux.ai/lcsc/esda18-1k~m10y)*