WMSIC Electronic Components

Jingdao Microelectronics SMBJ8.5CA

ModelSMBJ8.5CA
PackageSMB
BrandElectronic
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 26+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
Electronic SMBJ8.5CA
Type
Jingdao Microelectronics
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
Electronic
Electronic Component
SMBJ8.5CA
Electronic Component
1
Package
SMB
Type
TVS
Electronic Component
ESD and Surge Protection (TVS / ESD)
Electronic Component
0.167g
Electronic Component
1
Cj- Capacitor
390pF
Electronic Component
BM0263482808
Operating Temperature
65℃~+150℃
Voltage
14.4V
Current(Ir)
20uA
Voltage(VBR)
10.4V
Electronic Component
Electronic Component

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

SMBJ8.5CA TVS二极管产品概述

SMBJ8.5CA是晶导微电子推出的双向瞬态抑制二极管(TVS),采用SMB(DO-214AA)表面贴装封装,专为电子设备的瞬态过压防护设计。该器件具备宽温适应性、稳定的钳位性能及高脉冲耐受能力,可有效抑制雷击、静电放电(ESD)、电源浪涌等瞬态脉冲,是消费电子、汽车电子、工业控制等领域的高性价比防护元件。

一、基本属性与定位

SMBJ8.5CA属于双向TVS二极管(后缀“CA”明确双向防护特性,可同时抑制正负瞬态脉冲),封装类型为SMB(行业标准DO-214AA),体积紧凑(典型尺寸约3.5×2.5×1.5mm),适配小型化、高密度贴装的电子设备。作为晶导功率防护产品线的核心型号之一,其定位是中低电压电路的瞬态过压防护,替代传统氧化锌压敏电阻,具备响应速度快(<1ns)、钳位精度高的优势。

二、核心电性能参数详解

该器件的关键参数直接决定防护能力,具体如下:

  1. 反向截止电压(Vrwm=8.5V):正常工作时可承受的最大反向电压,电路工作电压需低于此值,确保器件不导通;
  2. 击穿电压(典型值10.4V):反向电压达到此值时,器件开始击穿导通,是从截止到钳位的过渡点;
  3. 钳位电压(14.4V):施加10/1000μs波形的峰值脉冲电流(41.7A)时,器件两端的最大电压——钳位电压越低,对后端电路的保护越充分;
  4. 峰值脉冲功率(600W@10/1000μs):可耐受的最大瞬态脉冲功率,10/1000μs为IEC标准脉冲波形(前沿10μs上升至峰值,半峰值持续1000μs),对应实际场景中雷击、浪涌的脉冲特性;
  5. 反向漏电流(20μA@Vrwm):正常截止状态的漏电流,数值小意味着静态功耗低,对电路影响可忽略;
  6. 结电容(390pF):寄生电容,适用于工作频率<10MHz的电路,若用于高频场景需结合需求评估(避免干扰信号传输)。

三、封装形式与典型应用场景

SMB封装具备表面贴装兼容性好、焊接可靠性高、体积紧凑等特点,结合参数适配以下场景:

  1. 消费电子:手机、平板、笔记本的USB/音频接口防护,抑制静电及电源浪涌;
  2. 汽车电子:车载中控、传感器模块的过压防护(工作温度覆盖汽车级需求);
  3. 工业控制:PLC、传感器节点的电源端口防护,应对工业现场电磁干扰;
  4. 通信设备:路由器、交换机的以太网端口防护,抑制共模/差模浪涌。

四、环境适应性与可靠性

该器件的环境参数满足严苛场景需求:

  • 宽温范围:-65℃~+150℃,覆盖北方户外低温、汽车发动机舱高温等场景;
  • 多次脉冲耐受:可承受重复瞬态脉冲冲击,性能无明显衰减(符合行业可靠性标准);
  • 漏电流稳定:20μA漏电流在宽温范围内变化小,确保长期工作可靠性。

五、品牌背景与选型参考

晶导微电子是国内功率半导体龙头企业,TVS产品线覆盖全封装/电压等级,部分型号通过AEC-Q101汽车级认证,品质可靠。

选型参考:

  • 适用场景:电路工作电压≤8.5V、需双向防护、脉冲功率≤600W;
  • 替代/互补:单向防护可选同系列SMBJ8.5A;高频电路需选低结电容型号(如SMBJ8.5CA结电容390pF,若需更低可换其他系列)。

综上,SMBJ8.5CA以紧凑封装、稳定钳位性能及宽温适应性,成为多场景过压防护的高性价比选择。

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