WMSIC Electronic Components

AOTE AT357B-CUH-SE AT357B

ModelAT357B-CUH-SE
PackageSOP-4
BrandAOTE
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 25+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
AOTE AT357B-CUH-SE
Type
AOTE
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
AOTE
Electronic Component
AT357B-CUH-SE
Electronic Component
1
Package
SOP-4
Electronic Component
Transistor Output Optocoupler
Electronic Component
0.227g
Electronic Component
1
Electronic Component
3us
Electronic Component
BM0229305978
Operating Temperature
55℃~+110℃
Load Voltage
80V
Type
DC
Output Current
50mA
Output Type
Photoelectric Transistor
Output Channel Count
1

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

AT357B-CuH-SE(光电三极管输出光耦)产品概述

一、概述

AT357B-CuH-SE 是 AOTE(奥特)推出的一款高灵敏度光耦,输入为直流发光二极管(LED),输出为光电三极管,采用 SOP-4 封装。该器件提供高绝缘强度和宽温度工作范围,适用于工业控制、隔离信号传输、微控制器接口及电源管理等场景,兼顾小体积封装与良好电气隔离性能。

二、主要技术参数

  • 隔离耐压(Vrms):3.75 kV
  • 输入类型:DC(LED 驱动)
  • LED 正向电压(Vf):典型 1.2 V
  • LED 正向电流(If)最大值:50 mA(建议按应用限制)
  • 直流反向耐压(Vr):6 V
  • 电流传输比(CTR):最小 130%,最大/饱和值 260%
  • 输出类型:光电三极管
  • 输出电流(Io)最大:50 mA
  • 集射极饱和电压 VCE(sat):200 mV(标注条件下,如 1 mA / 20 mA)
  • 负载电压(耐压):80 V
  • 上升/下降时间:tr = 4 μs,tf = 3 μs(典型)
  • 输出通道数:1 通道
  • 工作温度范围:-55 ℃ ~ +110 ℃
  • 封装:SOP-4

三、性能特点

  1. 高灵敏度:CTR 最小值达 130%,在较低 LED 驱动下即可获得可靠输出,CTR 上限可达 260%,适合弱驱动场合。
  2. 强绝缘能力:3.75 kVrms 隔离等级,满足多种安全隔离需求,适合低压与控制侧之间的信号隔离。
  3. 宽电压与电流余量:输出耐压 80 V,输出电流支持到 50 mA;VCE(sat) 低,开关时压降小。
  4. 宽工作温度:-55 ℃ 至 +110 ℃,适合工业与汽车周边环境(根据具体认证)。
  5. 紧凑封装:SOP-4 表面贴装,利于 PCB 密集布局与自动化贴装。

四、典型应用

  • 工业控制信号隔离(PLC、驱动器接口)
  • 微控制器与高电压电路间的数字隔离
  • 电源监测与开关信号耦合
  • 家电、通信设备和测试测量仪表的信号隔离

五、设计与使用建议

  • 为延长 LED 与器件寿命,通常推荐使用低于 If 最大值的工作电流,并注意脉冲/持续功率限制。
  • 输出侧使用上拉电阻(对三极管输出),阻值应根据所需响应速度与电流容量选择;较小阻值可提升开关速度但增加功耗。
  • 由于 CTR 随温度与 If 变化明显,关键精度应用建议在系统层面做闭环或校准处理。
  • 注意 LED 反向电压限制(Vr=6 V),避免反向过压;输出侧注意不要超过 80 V 的负载电压上限。
  • 封装焊接时遵循制造商的回流温度曲线和 ESD 操作规范。

六、封装与可靠性

SOP-4 小型表贴封装便于批量生产和自动贴装,器件设计满足长期工业环境下的热循环与电气隔离要求。选用时请参考完整数据手册以获取更多绝缘、寿命与可靠性试验数据,以及焊接工艺建议。

总结:AT357B-CuH-SE 以高 CTR、良好隔离与工业级温度范围为特点,适合需要可靠信号隔离且驱动能力受限的场景。购买与设计前请参阅厂家详细数据手册以确认全部限制条件与典型参数。

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