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SMAJ6.0A是台湾迪嘉(TWGMC)推出的单向瞬态抑制二极管(TVS),核心功能为静电放电(ESD)和低压浪涌干扰防护,采用DO-214AC封装(俗称SMA封装)——这是一种小型贴片封装,尺寸紧凑(典型值:长2.7mm×宽1.7mm×高1.1mm),适配高密度PCB设计,可通过自动贴装设备快速生产,适合消费电子、工业控制等对空间要求较高的场景。
该产品的电气参数围绕“浪涌/ESD防护有效性”和“系统兼容性”设计,关键参数如下:
反向截止电压(Vᵣₘₘ):6V
指TVS正常工作时允许施加的最大反向直流电压,系统工作电压需低于此值(如5V电源系统),避免TVS在常态下导通漏电流过大,影响系统功耗。
钳位电压(V_C):10.3V
是TVS在额定峰值脉冲电流下的峰值电压,直接决定防护效果——当浪涌/ESD脉冲到来时,TVS会快速击穿并将电压钳位在10.3V以内,保护后端敏感元件(如MCU、传感器)不被过压损坏(需确保后端元件耐压高于10.3V)。
峰值脉冲电流(Iₚₚ)与功率(Pₚₚ):38.8A@10/1000μs、400W@10/1000μs
采用10/1000μs标准浪涌波形(电流从0上升到峰值耗时10μs,再下降到峰值的50%耗时1000μs),体现了产品对“慢速浪涌”的耐受能力,可应对电源启动浪涌、雷电感应浪涌等常见干扰。
击穿电压(V_B):7.37V
反向电压超过此值时,TVS开始击穿导通(但未达到钳位电压),是从“截止”到“防护”的过渡阈值,与Vᵣₘₘ形成约1.37V的余量,避免系统电压波动误触发TVS。
反向电流(Iᵣ):800μA
指Vᵣₘₘ下的反向漏电流,此值较小,可降低常态下的功耗,避免影响系统正常工作(如低功耗传感器电路)。
工作温度范围:-65℃~+150℃
覆盖工业级宽温要求,可在极端环境(如户外设备、汽车电子辅助系统)中稳定工作,无需额外散热设计。
SMAJ6.0A符合IEC 61000-4-2静电放电标准,该标准定义了接触放电(最高8kV)和空气放电(最高15kV)的测试要求,产品可有效抑制此类静电干扰,避免电子设备出现数据错误、硬件损坏等问题。此外,其脉冲功率参数可满足IEC 61000-4-5浪涌抗扰度的部分低压场景需求(如1.2/50μs电压浪涌、8/20μs电流浪涌的低等级测试)。
基于参数特性,SMAJ6.0A适用于以下低压系统的防护:
综上,SMAJ6.0A凭借紧凑封装、宽温范围和可靠的浪涌/ESD防护能力,成为低压电子系统的高性价比防护器件,可覆盖多数消费电子、工业控制场景的抗干扰需求。
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