# B340A (Component) ## Description 40V Independent Type 550mV@3A 3A SMA(DO-214AC) B340A is a surface-mount Schottky Barrier Rectifier diode designed for high-efficiency power conversion applications. It is commonly used in DC-DC converters, switching power supplies, freewheeling circuits, and reverse-polarity protection due to its low forward voltage drop and fast switching characteristics. The device is typically rated for 3 A average forward current and 40 V reverse voltage in an SMA package. Key Features Schottky barrier technology for low forward voltage drop 3 A average rectified forward current 40 V peak repetitive reverse voltage (VRRM) Low power loss and high efficiency Fast switching performance suitable for high-frequency circuits Guard ring construction for improved transient and surge protection High surge current capability (up to 80–100 A peak, depending on manufacturer specification) Surface-mount SMA package for compact PCB designs RoHS-compliant and lead-free options available Suitable for DC-DC converters, freewheeling diodes, inverters, and polarity protection circuits #CommonPartsLibrary #Diode ## Component Details - **Owner:** lcsc - **Created:** 10/30/2024 - **Last Updated:** 6/2/2026 - **Visibility:** Public - **Datasheet URL:** https://www.lcsc.com/datasheet/C3018525.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=FlkNBAIDRQULVABfFAVZBgZVFVZYBgZSQ1NeBVIFQlExVlNeR1VeUFRRTlZcXzsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D - **License:** https://creativecommons.org/licenses/by/4.0/ - **Max Reverse Voltage:** 40V - **LCSC Part Number:** C3018525 - **Diode Type:** Schottky Diode - **Part Type:** Schottky Barrier Diodes (SBD) - **Forward Voltage:** 0.45V to 0.55V at 3AV - **Manufacturer Part Number:** B340A - **JLCPCB Part Class:** Extended Part - **Manufacturer Name:** FUXINSEMI(富芯森美) - **Package or Case Code:** SMA_L4.3-W2.6-LS5.0-RD - **Used in:** 76 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/b340a/lite-on-technology.html?utm_currency=USD&region=nac) | N/A | N/A | | [HQonline](https://www.hqonline.com/product-detail/schottky-diode-mdd-b340a-2500237391) | N/A | N/A | | [LCSC](https://www.lcsc.com/product-detail/C3018525.html) | N/A | N/A | | [Verical](https://www.verical.com/pd/microdiode-semiconductor--mdd--rectifier-B340A-6649107?utm_currency=USD) | N/A | N/A | - **Part Type:** Diodes - **Sub-Type:** Schottky - **MPN:** B340A - **Mount Type:** Surface Mount - **Package / Case Code:** TO - **Pin Count:** 2 - **Forward Voltage:** 0.45V to 0.55V at 3AV - **Compliance:** Rohs, Lead Free ## Pins | Pin | Name | Type | |-----|------|------| | 1 | K | | | 2 | A | | --- *Generated from [https://www.flux.ai/lcsc/b340a~7uya](https://www.flux.ai/lcsc/b340a~7uya)*