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FUXINSEMI BAV21W
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- FUXINSEMI BAV21W
- Type
- FUXINSEMI
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- FUXINSEMI
- Electronic Component
- BAV21W
- Electronic Component
- 1
- Package
- SOD-123
- Electronic Component
- Switch Diode
- Electronic Component
- 0.035g
- Electronic Component
- 1
- Electronic Component
- BM0265133016
- Current
- 200mA
- Diode
- 1
- Current(Ir)
- 100nA@200V
- (Vf)
- 1.25V@200mA
- Power Dissipation(Pd)
- 250mW
- Electronic Component
- 55℃~+150℃@(Tj)
- 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.
BAV21W 单只开关二极管 产品概述
一、概述
BAV21W（品牌：FUXINSEMI / 富芯森美）为一款小型独立式开关二极管，采用 SOD-123 封装，设计用于中高压快速开关和通用整流场合。器件在200V反向耐压下保持极低反向电流（100nA@200V），正向电流额定200mA，正向压降为1.25V@200mA，具有良好的开关速度（反向恢复时间50ns）及瞬态浪涌能力（Ifsm 2.5A），适合空间受限的高可靠性电子系统。
二、主要电气与热参数
- 器件类型：独立式开关二极管（单只）
- 封装：SOD-123（小型表面贴装）
- 直流整流电流（IF）：200mA
- 非重复峰值浪涌电流（IFSM）：2.5A
- 耗散功率（Pd）：250mW（器件最大耗散，应用时需考虑散热/降额）
- 直流反向耐压（VR）：200V
- 正向压降（VF）：1.25V @ 200mA
- 反向电流（IR）：100nA @ 200V
- 反向恢复时间（Trr）：50ns
- 工作结温范围（Tj）：-55℃ ～ +150℃
三、主要特性与优势
- 高压耐受：200V 的反向耐压满足多数中高压开关与保护场景需求；
- 低漏电：100nA 的低反向电流有利于降低待机功耗与提高测量精度；
- 快速恢复：50ns 的反向恢复时间适用于高频开关与脉冲电路，减少开关损耗与干扰；
- 紧凑封装：SOD-123 体积小，便于高密度 PCB 布局与自动贴装；
- 良好浪涌承受力：2.5A 的瞬态浪涌能力可应对短时突发电流冲击。
四、典型应用场景
- 开关电源中的快速整流与钳位电路；
- 输入保护与反向极性保护；
- 信号整形、限幅与高压逻辑隔离电路；
- 高频脉冲、采集前端的恢复型整流；
- 仪表、携带设备及电池供电系统中要求低漏电与高耐压的电路。
五、设计与使用建议
- 电流与功耗降额：长期工作时建议工作电流远低于最大额定值并考虑周围温度，以控制结温；Pd 仅250mW，需合理布局以利散热；
- 热管理：在高工作电流或高环境温度条件下，通过增大铜箔面积或接地平面改善散热；
- 布局注意：避免紧邻敏感模拟节点，减少开关瞬态引起的干扰；尽量缩短输入与输出走线以降低寄生感抗；
- 焊接与存放：遵循 SMD 常规回流焊工艺，避免超出制造商建议的温度剖面；长时间存放前注意防潮防污染。
六、可靠性与替代
BAV21W 在-55℃至+150℃结温范围内可满足工业级温度需求，适用于严苛环境下的长期工作。如需更低正向压降或更高耐压，可选用相近参数的高压快恢复或肖特基二极管作替代，但应权衡漏电、反向恢复与正向压降等性能差异。
如需样片、器件 Datasheet 或在特定电路中的匹配建议，可提供更详细的电参数曲线与典型应用电路参考。
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