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DOWO DTC143ECA
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- DOWO DTC143ECA
- Type
- DOWO
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- DOWO
- Electronic Component
- DTC143ECA
- Electronic Component
- 1
- Package
- SOT-23
- Electronic Component
- 1 NPN
- Electronic Component
- Digital Transistor
- Electronic Component
- 0.031g
- Electronic Component
- 1
- Electronic Component
- BM0257638265
- Operating Temperature
- 55℃~+150℃
- Resistor
- 1
- Resistor
- 4.7kΩ
- Transistor Type
- NPN
- Frequency(f T)
- 250MHz
- Power Dissipation(Pd)
- 200mW
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
DTC143ECA 产品概述
一、产品简介
DTC143ECA（品牌：DOWO/东沃）是一款封装为SOT-23的小功耗开关型晶体管单元，集成了输入限流电阻，便于直接与逻辑电平或微控制器输出接口连接。器件主要用于低电流开关、信号转换与接口缓冲，工作温度范围宽（-55℃~+150℃），适用于工业与民用的宽温度场景。
二、主要电气参数
- 耗散功率 Pd：200 mW（器件热耗散上限，需按散热条件评估实际允许电流）
- 最小输入电压 VI(on)：3.0 V（输入处于导通判断的参考值）
- 最大输入电压 VI(off)：0.5 V（低电平关闭的最高允许值）
- 输出电压 VO(on)：0.3 V（导通时输出饱和电压，代表导通损耗）
- 输入电阻：6.11 kΩ（内置基极限流电阻，便于直接驱动）
- 电阻比率：1（表明器件内阻配置为单一比例，简化外部设计）
- 封装：SOT-23（紧凑、易贴装）
三、功能与特性要点
- 集成输入限流电阻，减少外部元件数量，简化PCB布局；
- 可直接由3.3V或5V逻辑电平驱动（VI(on)=3V为参考），在低功耗逻辑电路中应用方便；
- VO(on)=0.3V 表明在适当电流下有较低饱和压降，适合做低端开关；
- 宽工作温度适应性强，适合工业级应用。
四、典型应用场景
- MCU/GPIO接口驱动与电平转换；
- 小型继电器或光耦驱动（需按电流限制评估）；
- 指示灯、低功率负载开关；
- 信号缓冲及电平隔离。
五、设计与使用建议
- 根据Pd与VO(on)可以估算理论最大导通电流：若以VO(on)=0.3V与Pd=0.2W计算，理论上最大隔离电流约为0.66 A。但受限于封装散热与安全裕度，实际连续工作电流应远低于此值（建议在几十至一两百毫安内评估）；
- 输入端若采用3.3V逻辑驱动，输入电流约为3V/6.11kΩ≈0.49 mA，驱动负担小；
- 布局时注意SOT-23的散热路径，必要时增加铜箔面积或散热过孔以提升功耗承载能力；
- 为保证稳定性，建议在开关负载侧增加适当的抑制元件（如反向二极管、RC吸收）以抑制感性负载反冲。
六、注意事项与可靠性
- 在高温环境或靠近热源处使用时，应重新评估持续功耗与闭合电流，避免长期接近Pd极限；
- 器件参数（如VO(on)与VI(on)）通常在特定测试条件下测量，实际电路中请参考完整数据手册并做实际测试验证；
- 建议在设计阶段预留安全裕量，确保长期可靠性与稳态温升控制。
七、结论
DTC143ECA 是一款适合做低功耗逻辑驱动与小电流开关的集成型器件，内置输入限流电阻与SOT-23小封装使其在空间受限的应用中非常实用。合理控制工作电流和热管理，可在工业与消费类电子产品中发挥稳定可靠的作用。若需更详细的参数和典型应用电路，请参阅厂商数据手册或联系东沃技术支持。
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