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DOWO 200mA/24V 200MA
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- DOWO 200m A / 24V
- Type
- DOWO
- Minimum package
- 4000 编带
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- DOWO
- Electronic Component
- 200mA/24V
- Electronic Component
- 1
- Electronic Component
- 1.8mm
- Package
- 1206
- Electronic Component
- Resettable Fuse
- Electronic Component
- 0.028g
- Electronic Component
- 0.85mm
- Electronic Component
- 1
- Electronic Component
- 8s
- Electronic Component
- BM0258715510
- Operating Temperature
- 40℃~+85℃
- Voltage Rating(Vmax)
- 24V
- Power(Pd)
- 600mW
- Current(Imax)
- 40A
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
DOWO 1206 自恢复熔断器（24V / 200mA）产品概述
一、产品简介
DOWO（东沃）1206封装自恢复熔断器是一款面向24V系统的聚合物正温度系数（PTC）保护元件，标称保持电流（Ihold）为200mA，跳闸电流（Itrip）为400mA。器件尺寸符合1206贴片规范（宽度约1.8mm、高度约0.85mm），适合表面贴装工艺与高密度电路板应用，用于过流保护与短路限流，发生过流时自动进入高阻态并在故障消除后自动恢复。
二、主要电气参数
- 额定耐压：Vmax = 24V
- 保持电流：Ihold = 200mA（器件在该电流下长期不动作）
- 跳闸电流：Itrip = 400mA（在该电流或更高过流时器件进入高阻态）
- 最大瞬态/峰值电流：Imax = 40A（短时脉冲承受能力，非连续工作电流）
- 功耗：Pd ≈ 600mW（稳态下热耗限制）
- 初始电阻：Rmin ≈ 600mΩ（未动作时低阻态）
- 跳断后电阻：R1max ≈ 2.5Ω（进入保护态后的高阻值）
- 动作时间：≈ 8s（在特定过流条件下触发时间标称）
- 工作温度范围：-40℃ ~ +85℃
三、产品特性
- 小型化1206封装，节省PCB空间，便于自动贴装与回流焊接。
- 快速响应限流与自恢复能力，适合重复瞬态或可恢复过载场景。
- 低初始阻值、跳断后高阻值，有效在保护动作时限制故障电流并减少后续热累积。
- 宽温度范围，适应工业级应用环境。
- 能承受高达40A的短时浪涌，适配电源开启、负载插入等突发情况。
四、典型应用场景
- USB/充电接口、车载电子（24V总线低压分支）过流保护。
- 电池管理与保护电路（防止短路与逆接导致的过流）。
- 工业控制模块、传感器供电线路、通信设备的过流安全保护。
- 电机驱动或继电器线圈的短时浪涌限制（需确认能承受的能量）。
五、安装与使用注意
- 选型时保证正常工作电流低于Ihold，并留有裕量；若长期接近Ihold，应考虑升一级型号。
- 器件功耗受电阻与电流平方关系影响，高温环境会降低Ihold，应进行温度裕量设计。
- 回流焊接时遵循厂家推荐的温度曲线，避免长时间过热以保护内部材料。
- 对于需要绝对断开/人身保护的场合，应配合熔断式保险丝或机械断路器使用，自恢复熔断器不作为一次绝缘保护替代品。
六、选型与可靠性建议
- 在多次过流测试与实际工况下验证动作时间与恢复行为，确认Pd与热平衡符合系统要求。
- 对于需要EMC或低阻抗要求的信号线，注意Rmin带来的压降与信号影响。
- 建议与供应商确认批次一致性、温度-电流特性曲线与寿命数据，以满足长期可靠性需求。
该器件以其小巧封装与自恢复特性，适合在24V范围内提供可靠、可重复的过流保护，是消费电子、车载与工业场景中常用的保护元件选择。若需更详细的温度系数曲线、动作曲线或可靠性数据，可联系DOWO厂家获取完整数据手册。
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