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PANJIT 1SMA4738_R1_00001
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- PANJIT 1SMA4738_R1_00001
- Type
- PANJIT
- Minimum package
- 1800
Technical parameters
- Electronic Component
- PANJIT
- Electronic Component
- 1SMA4738_R1_00001
- Electronic Component
- 1
- Package
- SMA(DO-214AC)
- Electronic Component
- Zener Diode
- Electronic Component
- 0.107g
- Electronic Component
- 1
- (Zzk)
- 700Ω
- (Zzt)
- 4.5Ω
- Electronic Component
- BM0259717223
- Diode
- 1
- Current(Ir)
- 5uA@6V
- Power Dissipation(Pd)
- 1W
- Electronic Component
- 7.79V~8.61V
- Electronic Component
- 50℃~+150℃
- Electronic Component
- 1800
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
1SMA4738_R1_00001 产品概述
一、产品简介
1SMA4738_R1_00001 是强茂（PANJIT）出品的一款独立式稳压二极管，标称稳压值 8.2V，采用 SMA（DO-214AC）贴片封装。该器件以单个封装提供稳压、浪涌吸收与参考源功能，适合在空间受限、需可靠基准电压或过压保护的场合使用。
二、主要电气参数
- 标称稳压值（VZ）：8.2V，实际稳压范围 7.79V ~ 8.61V，满足一般精度要求的基准电压应用。
- 反向电流（Ir）：5 μA @ 6V（规格给出测试点），用于评估在低电流条件下的漏电特性。
- 最大耗散功率（Pd）：1W，需结合封装热阻和 PCB 散热条件进行降额设计。
- 稳压阻抗：Zzt = 4.5 Ω（稳压测试条件下的动态阻抗），Zzk = 700 Ω（拐点或低电流区的阻抗指标）。
- 工作结温范围：-50℃ ~ +150℃，适用于宽温区工业级应用。
三、封装与热管理
SMA（DO-214AC）表面贴装封装体积小、安装方便，但热阻相对较高。1W 的耗散能力在典型 PCB 条件下需通过合理铜箔散热来保证长期可靠性：扩大焊盘铜箔面、增加过孔与散热层、保持良好空气对流皆有助于降低结温。高温环境下应按厂方热特性曲线进行功率降额。
四、典型应用场景
- 作为 8.2V 基准电压源用于模拟子系统、偏置电路或参考节点。
- 电源轨的过压保护或瞬态钳位，配合限流电阻使用可吸收短时浪涌能量。
- 通用低功耗稳压与信号线路保护，适用于工业控制、通信、仪器仪表等领域。
五、使用建议与注意事项
- 在作为稳压使用时，应通过串联限流元件限制通过二极管的电流，避免长期超过 Pd 导致温升。
- 注意测量条件：规格表中的 Ir、Zzt、Zzk 等参数与测试电流/电压相关，设计时参考完整数据手册。
- 焊接工艺需控制回流温度与时间，避免超温影响参数稳定性。贴片后建议进行适当的焊盘与元件间距设计以利散热。
- 高频噪声或快速瞬态下，二极管的动态特性与容性特性可能影响响应，复杂电路中建议加 RC 滤波或缓冲级。
六、质量与选型要点
选择 1SMA4738_R1_00001 时，重点关注稳压范围、最大耗散功率与工作温度是否满足目标应用。对于要求更低动态阻抗或更高功率的场合，可考虑更大封装或专用低阻抗参考源。采购时推荐索取厂方完整规格书与可靠性测试报告，以便在严格应用环境下验证性能与寿命。
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