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Littelfuse SMBJ90CA
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
20
specifications
Core information
- Product name
- Littelfuse SMBJ90CA
- Type
- LITTELFUSE
- Unit
- Electronic Component
- Minimum package
- 3000
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- LITTELFUSE
- Electronic Component
- SMBJ90CA
- Electronic Component
- 1
- Package
- SMB(DO-214AA)
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.21g
- Electronic Component
- 1
- Electronic Component
- BM0258839690
- Operating Temperature
- 65℃~+150℃
- Voltage
- 146V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 100V
- Electronic Component
- 3000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMBJ90CA 产品概述
一、产品简介
SMBJ90CA 是 Littelfuse（美国力特）推出的一款双向瞬态电压抑制二极管（TVS），采用 SMB（DO-214AA）表面贴装封装，适用于对直流或交流母线发生瞬态过电压时提供快速钳位保护。器件为双向结构，可在正负方向对称钳位，常用于需要双向浪涌抑制的电源与信号线路。
二、主要参数
- 极性：双向
- 反向截止电压 Vrwm：90 V
- 击穿电压（Vz）：约 100 V
- 钳位电压（Vclamp，峰值脉冲条件下）：约 146 V
- 峰值脉冲电流 Ipp：4.1 A
- 峰值脉冲功率 Ppp：600 W
- 反向电流 Ir：1 μA（常温）
- 工作温度范围：-65 ℃ 至 +150 ℃
- 封装：SMB (DO-214AA)，2 引脚，T/R 卷带包装
三、关键特性
- 高频率响应快、响应时间极短，可在瞬间将过电压钳制至安全水平，保护下游器件免受瞬态损坏。
- 双向结构适配交流或双向脉冲场景，无需外加反向并联二极管。
- 600 W 的峰值脉冲功率能力，可处理较大能量的浪涌事件（制造商测试条件下）。
- 低静态漏电（典型 1 μA），对系统待机能耗影响小。
- 宽温度范围（-65 ℃～+150 ℃），适用于工业级与恶劣环境应用。
四、典型应用
- 工业电源、配电系统的浪涌防护
- 电机驱动、电源转换器的输入侧保护
- 通信设备和接口电路的过压抑制
- 逆变器、太阳能逆变系统及其他高压直流/交流总线的保护场景
- 需要双向抑制的信号线或保护器件旁路电路
五、封装与安装注意
- SMB（DO-214AA）为常见的中功率 SMD 封装，适合自动贴装与回流焊处理。
- 为保证热量及时散出并维持钳位性能，建议在器件焊盘区域配备充分的覆铜和热回流路径；对高能量脉冲场合可增加散热铜箔面积。
- 布线时尽量缩短从受保护节点到 TVS 的连接长度，降低寄生感抗与引入的过压。
- 考虑到实际脉冲能量与频次，合理评估器件在使用寿命内的累积热应力。
六、选型与可靠性建议
- 若系统工作电压接近或高于 90 V，应确认 Vrwm 与系统最大工作电压的裕量，避免在正常工作状态下触发击穿。
- 对于高能量/频繁浪涌环境，可考虑并联或选用更高 Ppp 等级的 TVS 器件，或配合熔断器/限流元件使用以分担能量。
- 在关键应用中参考 Littelfuse 数据手册中的脉冲测试条件（如波形）与最大允许能量，按实际浪涌情况（幅值、波形、重复率）进行验证。
- 选择时注意器件的包装与批次信息（SMBJ90CA，T/R 卷带装）以便于生产线采购与存储管理。
总结：SMBJ90CA 提供了在 90 V 级别直流/交流总线中可靠的双向瞬态保护，凭借 600 W 峰值功率和 146 V 钳位能力，适合工业电源与高压信号线的浪涌抑制需求。请以厂商数据表为最终选型依据，并在目标应用中进行必要的电磁兼容性与热可靠性验证。
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