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ST 1N4148PF diode 1N4148PF
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- ST 1N4148PF
- Type
- ST
- Minimum package
- 5000 盒
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- ST
- Electronic Component
- 1N4148PF
- Electronic Component
- 1
- Package
- DO-35
- Electronic Component
- Switch Diode
- Electronic Component
- 0.1g
- Electronic Component
- 1
- Electronic Component
- BM0224625140
- Current
- 200mA
- Diode
- 1
- Current(Ir)
- 5uA
- (Vf)
- 1V@10mA
- Power Dissipation(Pd)
- 500mW
- Electronic Component
- Electronic Component
- Electronic Component
- 5000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
1N4148PF（DO-35）产品概述
一、概述
1N4148PF 为 ST（先科）出品的高速开关二极管，采用玻璃封装 DO-35 轴向引出形式。器件以开关速度快、反向泄漏小和电气参数稳定著称，适合信号整流、脉冲开关与高频小信号处理等应用。
二、主要电气参数
- 正向压降 Vf：1.0 V @ IF = 10 mA
- 直流反向耐压 Vr：75 V
- 耗散功率 Pd：500 mW
- 反向电流 Ir：≤5 μA @ VR = 75 V
- 反向恢复时间 Trr：4 ns（快速恢复，适合高频切换）
- 整流电流（额定）：200 mA（平均整流电流）
（以上参数为典型规范，具体使用请参照厂方完整数据手册与温度/测试条件）
三、性能特点
- 快速开关：Trr 约 4 ns，可用于高频脉冲与数字电路的快速切换。
- 低泄漏：在最大反向电压下 Ir 仅约 5 μA，适合高阻抗、低噪声信号路径。
- 稳定的正向特性：Vf 在 10 mA 时约 1 V，利于精确电流限值设计。
- 玻璃封装（DO-35）：玻璃钝化，长期稳定性好，耐焊接热，也便于目视检查焊点与引脚完整性。
- 小型轴向封装，便于穿孔板/点焊与手工样机制作。
四、典型应用
- TTL/CMOS 驱动与脉冲整形电路
- 高频信号整流与限幅（视频、通信前端）
- 保护与钳位电路（需注意电压与能量限制）
- 开关电路、逻辑门恢复、脉冲列处理
- 低功耗、小电流信号路径中的通用二极管
五、设计与使用建议
- 电流与功耗：虽然由 Pd 可计算出理论上的功耗上限，但器件额定平均整流电流建议遵循 200 mA 规范并适当留有余量，避免长期在极限值工作。
- 反向余量：电路设计时应为 Vr = 75 V 留出裕量，防止瞬态电压或浪涌导致击穿。必要时并联 TVS 或 RC 吸收网络。
- 温升与散热：DO-35 为小功率封装，若工作电流接近额定值，应考虑环境温度和散热路径，避免长期过热导致参数漂移。
- 并联使用：不建议并联多个同型号二极管用于增加电流能力，因正向压降不完全一致会导致电流不均。若需更大电流，应选用额定更高的器件。
- 焊接与机械：玻璃封装脆性相对较大，焊接时注意焊接温度与时间，避免机械弯折引脚造成封装破裂。
六、封装与标识
- 封装：DO-35 轴向玻璃封装，适用于穿孔安装与手工焊接场景。
- 标识：厂商型号 1N4148PF，品牌 ST（先科），具体丝印与包装请参照出货标签与数据表。
七、总结
1N4148PF（DO-35）是一款针对高速开关与小信号整流优化的二极管，具有快速恢复、低反向漏电与良好封装稳定性。适合各类脉冲、数字与模拟前端电路。在电路设计中应关注工作电流、反向电压裕度及散热条件，按数据手册规范使用可获得长期可靠的性能表现。
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