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LRC SMBJ15CA
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- LRC SMBJ15CA
- Type
- LRC
- Minimum package
- 3500 编带
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- LRC
- Electronic Component
- SMBJ15CA
- Electronic Component
- 1
- Package
- SMB
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.19g
- Electronic Component
- 1
- Cj- Capacitor
- 550pF
- Electronic Component
- BM0230658843
- Operating Temperature
- 55℃~+150℃
- Voltage
- 24.4V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 18.5V
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMBJ15CA TVS 二极管（LRC 乐山无线电）——产品概述
一、产品简介
SMBJ15CA 为乐山无线电（LRC）出品的双向瞬态电压抑制器（TVS）二极管，采用SMB封装，专为抑制电源与信号线的瞬态过电压和浪涌冲击设计。器件具有较高的脉冲功率承受能力与低漏电流，适用于汽车电子、通信设备、电源模块及工业控制等需要浪涌保护的场景。
二、主要参数与特性
- 极性：双向（可同时吸收正/负极性脉冲）
- 反向截止电压 Vrwm：15 V（稳态工作耐受电压）
- 击穿电压（Vbr）：18.5 V（典型）
- 钳位电压 Vc（峰值钳位）：24.4 V
- 峰值脉冲电流 Ipp：24.6 A（标称冲击电流能力）
- 峰值脉冲功率 Ppp：600 W（冲击吸收能力，具体测量条件请参照厂商曲线）
- 反向漏电流 Ir：1 µA（在 Vrwm 下）
- 结电容 Cj：≈550 pF（典型值）
- 工作温度范围：-55 ℃ ～ +150 ℃
- 封装：SMB（常见贴片型 DO-214AA）
以上参数反映了该器件在抑制开关瞬变、雷击感应脉冲与静电放电类事件时的能力与限制。
三、典型应用场景
- 直流/直流输入电源防护（15V 级别电源母线）
- 汽车电源与线束浪涌保护（板级保护器件）
- 工业控制接口、电磁兼容（EMC）吸收器
- 中低速数字/模拟信号线防护（注意结电容影响）
注意：由于结电容约为550 pF，SMBJ15CA 不适合对高速差分信号（如高速以太网、USB3.0、PCIe 等）进行线路直连保护，会引入显著的信号失真与带宽下降。
四、封装与散热注意
SMB 封装便于表面贴装加工，适配自动回流焊。器件承受高能量脉冲时，热量主要通过焊盘和 PCB 铜箔散到环境，建议在 PCB 两侧和焊盘周围增加适量铜面积以提升热散能力，并保证与被保护电路之间有可靠的热与电流路径。
五、布局与使用建议
- 尽量将 TVS 紧靠被保护的器件或接口引脚放置，减小串联阻抗与寄生电感；
- 走线短粗，焊盘宽并加接地铜箔，提升冲击能量分散能力；
- 对浪涌较大的场合可配合串联电阻或铁氧体共模器件限制峰值电流；
- 在长时间工作电压接近 Vrwm 时，关注温升对漏电流的影响；
- 在设计时依据被保护电路的最大允许钳位电压选择 TVS，以保证钳位后电路不被破坏。
六、选型与验证要点
选择 SMBJ15CA 时，应确认被保护点的最大允许瞬态电压低于 24.4 V（器件钳位电压），并确保工作电压不超过 15 V。对于要求低电容的接口或极低漏电流的应用，应考虑替代低容或单向型号。最终应用前，建议按实际应用环境进行浪涌、热冲击与长时漏电测试，参照 LRC 数据手册中的波形与测试条件验证器件性能。
如需更详细的电气曲线、封装尺寸或推荐 PCB 焊盘，请查阅 LRC 官方数据表或联系供应商获取最新资料。
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