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UMW PC817B
Configuration
1 options
Configuration
Electronic Component
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- UMW PC817B
- Type
- UMW
- Minimum package
- 5000 盒
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- UMW
- Electronic Component
- PC817B
- Electronic Component
- 1
- Package
- DIP-4
- Electronic Component
- Transistor Output Optocoupler
- Electronic Component
- 0.407g
- Electronic Component
- 1
- Electronic Component
- 3us
- Electronic Component
- BM0266010888
- Operating Temperature
- 30℃~+100℃
- Load Voltage
- 35V
- Type
- DC
- Output Current
- 50mA
- Output Type
- Photoelectric Transistor
- (Pd)
- 200mW
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
PC817B 光电耦合器（UMW）产品概述
一、产品简介
PC817B（UMW/友台半导体）为高隔离度光电耦合器，封装形式为 DIP-4。器件以红外发光二极管驱动光电三极管实现电气隔离，输入类型为直流（DC），适用于低至中速信号隔离与逻辑电平传递。工作温度范围为 -30℃ 至 +100℃，隔离电压（Vrms）达 5kV，满足常见工业与消费类产品的安全隔离要求。
二、主要电气参数
- 隔离电压：5 kVrms（测试条件下）
- 电流传输比（CTR）：最小 50%，最大/饱和可达 600%（取决于 If、测量条件及老化）
- 正向压降 Vf：典型 1.2 V（If 参考值）
- 正向电流 If：最大 50 mA（建议连续工作时按额定值及散热条件选取）
- 直流反向耐压 Vr：6 V
- 输出类型：光电三极管，输出电流可达 50 mA，负载电压最高 35 V
- 集—射极饱和电压 VCE(sat)：约 100 mV（典型条件 If=20 mA，Ic=1 mA）
- 上升/下降时间：tr ≈ 4 μs，tf ≈ 3 μs（适合低中速开关应用）
- 总功耗 Pd：200 mW
三、应用场景与适用性
PC817B 适合用于：
- MCU 与高电压/噪声侧的信号隔离、开关量隔离；
- 开关电源反馈隔离、欠压/过流检测接口；
- 工业控制、仪表、继电器驱动与通信接口的电气隔离；
- 需要高增益（高 CTR）以减少 LED 驱动电流的场合。
由于上升/下降时间在微秒级，器件不适合高速数据总线（如 MHz 级）传输。
四、设计注意事项
- 输入侧：正向电流 If 不应长期超过额定值 50 mA，建议在连续工作中采用更低 If 并考虑散热与寿命。LED 反向电压不得超过 6 V。
- 输出侧：输出三极管为开集电极结构，务必使用上拉电阻，负载电压不得超过 35 V。若需要更快恢复，可并联斜率补偿或选择专用高速光耦。
- CTR 受温度、If 与老化影响较大，设计时预留裕量，避免仅以典型值计算。
- 隔离设计：5 kVrms 为测试耐压，实际产品应结合电路板爬电距离与爬弧要求，满足安全标准（如必要时做长时耐压验证）。
五、封装与采购
PC817B 采用 DIP-4 通孔封装，便于插装与焊接，适用于样机与批量生产。品牌为 UMW（友台半导体），采购时注意批次与出厂检验报告，必要时确认 CTR 曲线与寿命数据。总体而言，PC817B 在成本、隔离性能和增益之间具有良好平衡，适用于工业控制与电源隔离等广泛领域。
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