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CJ 1SMA4764A
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- CJ 1SMA4764A
- Type
- CJ
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- CJ
- Electronic Component
- 1SMA4764A
- Electronic Component
- 1
- Package
- SMAG
- Electronic Component
- Zener Diode
- Electronic Component
- ±5%
- Electronic Component
- 0.111g
- Electronic Component
- 1
- (Zzk)
- 3kΩ
- (Zzt)
- 350Ω
- Electronic Component
- BM0229991210
- Diode
- 1
- Current(Ir)
- 100nA
- Power Dissipation(Pd)
- 1W
- Electronic Component
- 55℃~+150℃
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
1SMA4764A 产品概述
一、产品简介
1SMA4764A 是 CJ（江苏长电/长晶）出品的一款高压稳压（齐纳）二极管，标称稳压值为 100V，属于 1W 功耗等级的表面贴装保护元件。器件采用 SMAG 封装，体积小、可靠性高，适合在空间受限且需高压稳压或过压保护的电路中使用。
二、主要电气参数
- 标称稳压：100V（VZ）
- 反向电流 Ir：100nA（在 76V 条件下测得）
- 最大耗散功率 Pd：1W（环境温度和散热条件决定实际可用功率）
- 阻抗 Zzt：350Ω（在规定测试电流下的直流动态阻抗）
- 阻抗 Zzk：3kΩ（在拐点或低电流条件下的高阻抗指标）
- 工作结温范围：-55℃ ~ +150℃
以上参数表明该器件在低漏电流、高压稳压场景下具有良好的静态特性，但在瞬态冲击或高电流条件下阻抗较高，需注意限流与散热设计。
三、封装与热特性
SMAG 封装适合回流焊工艺，焊盘设计应参考厂家封装图纸以获得最佳热阻。1W 的耗散能力在 PCB 上需通过增加铜箔面积或散热层来提高实际散热能力；在高环境温度下应按功率温度特性曲线做热降额处理，避免结温超过 +150℃。
四、典型应用场景
- 高压参考或基准稳压电路
- 过压保护与浪涌吸收（需配合限流电阻或恒流源）
- 测试与测量设备中的高压保护元件
- 工业电源、通信设备中需要小漏电、高耐压的稳压点
五、选型与可靠性建议
选择时应确认工作电压与测试条件一致，若电路存在较大浪涌或反复过压，应增加限流器件或选用低阻抗大功率器件。焊接和回流工艺需满足厂家温度曲线，避免机械应力导致封装裂纹。长期可靠性与热循环、潮湿敏感性有关，提供适当的防潮和组装控制可延长寿命。
六、装配与检测要点
- 推荐按 CJ 的封装与回流曲线进行焊接，避免过热或冷却过快。
- 测试时注意按规定电压与电流条件测量 VZ 和 Ir，动态阻抗需要在指定测试电流下测得。
- 储存防潮、防静电，开盘后按 ESD 要求操作。
1SMA4764A 在高压低漏特性方面表现突出，适用于对稳压精度与漏电限值有较高要求的场合。购买与设计前建议参考厂家完整规格书以获得详细的测试条件与应用建议。
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