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Leiditech SM8S33CA
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Leiditech SM8S33CA
- Type
- LEIDITECH
- Minimum package
- 750 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- LEIDITECH
- Electronic Component
- SM8S33CA
- Electronic Component
- 1
- Package
- DO-218AB
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 3.3g
- Electronic Component
- 1
- Electronic Component
- BM0265086916
- Voltage
- 53.3V
- Current(Ir)
- 5uA
- Voltage(VBR)
- 40.6V
- Electronic Component
- Electronic Component
- Electronic Component
- 750
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SM8S33CA 瞬态抑制二极管（TVS）产品概述
SM8S33CA是雷卯电子（Leiditech）推出的一款双向瞬态抑制二极管（TVS），专为低压电路的瞬态过压防护设计，具备高脉冲承受能力、低漏电流及快速响应特性，广泛适配工业控制、通信设备等场景的过压防护需求。
一、核心参数总览
SM8S33CA的关键参数明确，可满足大多数低压电路的防护匹配：
参数类型 数值规格 备注 极性 双向 正反方向均具备防护能力 反向截止电压（Vrwm） 33V 常态工作下可承受的反向电压 击穿电压（Vbr） 36.7V（最小值）/40.6V（典型值） 电压触发导通的阈值范围 钳位电压（Vc） 53.3V 10/1000μs脉冲下的峰值钳位电压 峰值脉冲电流（Ipp） 124A 10/1000μs脉冲波形下的最大承受电流 峰值脉冲功率（Ppp） 6.6kW 对应脉冲电流与钳位电压的乘积 反向漏电流（Ir） 5μA（最大值） 常态下的漏电流，不影响电路正常工作 封装 DO-218AB（SMC贴片封装） 体积小巧，适合表面贴装二、关键性能解析
SM8S33CA的性能参数针对实际防护场景优化，核心优势体现在以下几点：
- 双向防护适配性：双向极性设计无需区分电路正负极，简化焊接与安装流程，尤其适合信号/电源端口的双向过压防护；
- 精准电压匹配：33V反向截止电压（Vrwm）与典型40.6V击穿电压，精准适配33V以下低压直流电路（如12V/24V系统），常态下不导通，避免干扰电路；
- 强脉冲承受能力：6.6kW峰值脉冲功率与124A峰值脉冲电流，可有效抑制10/1000μs波形的浪涌脉冲（常见于雷电感应、开关切换等瞬态干扰）；
- 低漏电流保障：5μA反向漏电流远低于多数同类器件，确保常态工作下不增加电路功耗，也不影响敏感元件正常运行；
- 快速响应特性：TVS本身具备ns级响应速度，SM8S33CA可在瞬态过压发生时迅速导通，将电压钳位至53.3V以下，保护后端电路免受损坏。
三、封装与可靠性
SM8S33CA采用DO-218AB（SMC）贴片封装，具备以下优势：
- 体积小巧：尺寸仅约6.0×5.0×2.5mm，适合高密度电路板贴装，尤其适配小型化设备（如智能家居、便携通信设备）；
- 焊接兼容性：表面贴装工艺兼容回流焊、波峰焊，生产效率高；
- 可靠性保障：雷卯电子作为国内防雷防护器件知名品牌，SM8S33CA经过严格可靠性测试（温度循环、湿度老化、浪涌重复测试），可承受多次浪涌冲击不失效，满足工业级应用稳定性要求。
四、典型应用场景
SM8S33CA的参数特性使其适配多种低压电路的过压防护，典型应用包括：
- 工业控制：PLC输入/输出端口、传感器接口、电机驱动电路的瞬态过压防护；
- 通信设备：路由器、交换机、基站的电源端口、以太网接口的雷电感应防护；
- 消费电子：显示器、机顶盒、智能家居设备（智能门锁、摄像头）的信号/电源端口防护；
- 低压电源：12V/24V直流电源输出端防护，抑制开关切换或负载突变产生的浪涌。
五、选型与应用注意事项
- 电压匹配：确保电路常态工作电压低于33V（Vrwm），避免器件常态导通；
- 脉冲功率匹配：根据实际浪涌功率选择，6.6kW峰值功率可覆盖多数低压场景需求；
- 安装注意：贴片封装需控制焊接温度与时间，避免损坏器件；防护电路中可串联限流电阻，进一步增强可靠性。
SM8S33CA作为雷卯电子经典TVS产品，以高性价比、稳定可靠的特性，成为低压电路过压防护的常用选型，可有效替代进口同类器件，降低设备成本。
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