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Jingdao Microelectronics 1SMA4743A
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Electronic 1SMA4743A
- Type
- Jingdao Microelectronics
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic
- Electronic Component
- 1SMA4743A
- Electronic Component
- 1
- Package
- SMA
- Electronic Component
- Zener Diode
- Electronic Component
- 0.062g
- Electronic Component
- 1
- (Zzt)
- 10Ω
- Electronic Component
- BM0230630724
- Diode
- 1
- Current(Ir)
- 5uA@10V
- Power Dissipation(Pd)
- 1W
- Electronic Component
- 12.4V~14.1V
- Electronic Component
- 55℃~+150℃
- 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.
1SMA4743A 产品概述
一、产品简介
1SMA4743A 是晶导微电子推出的一款独立式稳压二极管（Zener），标称稳压值为 13V，封装为 SMA（DO-214AC）。器件为小功率、低成本的电压基准与浪涌保护元件，适用于各种消费电子与工业控制板的局部稳压和过压钳位应用。
二、主要参数
- 稳压值（标称）：13V
- 稳压值（范围）：12.4V ～ 14.1V
- 反向电流 Ir：5 μA @ 10V
- 动态阻抗 Zzt：10 Ω
- 最大耗散功率 Pd：1W（基于良好散热条件）
- 结温范围 Tj：-55 ℃ ～ +150 ℃
- 封装：SMA（独立式贴装）
三、器件特点与优势
- 低漏电流：在 10V 时 Ir 仅 5 μA，有利于低功耗电路中的参考源稳定性。
- 适中阻抗：Zzt≈10Ω，能在中等电流范围内提供较稳定的稳压表现。
- 全温度范围工作：-55℃ 至 +150℃ 结温，适应温度变化较大的环境。
- 标准 SMA 封装，兼顾可靠性与焊接方便，适合自动贴装生产。
四、典型应用
- 低功耗电压参考与基准源（需外接串联限流电阻）。
- 各类电子模块的电源钳位与瞬态浪涌吸收（低能量瞬变）。
- 仪表与传感器的局部稳压。
- 保护电路中作为过压保护或回路限制元件。
五、设计与使用要点
- 功率限制：最大耗散功率为 1W，实际使用中应按 PCB 散热条件降额，建议工作电流远低于 Pd/Vz（≈77 mA），常规设计中以 5–30 mA 为宜以保证温漂与寿命。
- 串联电阻选择：R = (Vin - Vz) / Iz，需同时考虑最大瞬态电流与器件耗散。
- 动态阻抗影响稳压精度：若需更高精度，请在较高稳流下使用或选择低阻抗型号。
- 极性识别：SMA 封装上有阴极标记，安装时注意方向。
六、封装与焊接建议
- SMA（DO-214AC）适合回流焊或手工焊接。
- 为提高热耗散，应在焊盘处增加铜箔面积或连接散热铜皮，减少结温上升。
- 焊接温度与时间应遵循厂家回流曲线，避免过热影响结电性与可靠性。
七、可靠性与质量控制
- 建议在高湿或腐蚀性环境中使用防护涂层或采取密封措施。
- 出货前常见测试包括稳压电压、反向漏电、热循环及功耗验证，以确保在指定 Tj 范围内性能稳定。
八、选型与备货建议
- 若需更低噪声或更高精度的参考，请考虑低阻抗或温度系数更优的型号。
- 批量选型时注意稳压值范围（12.4–14.1V）对系统允许偏差的影响，并留下充分的功率裕量以延长使用寿命。
总之，1SMA4743A 在中小功率稳压与过压保护场合具有成本与性能的平衡，是常见的通用稳压二极管选择。
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