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Brightking BK250-200-DZ BK250
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Brightking BK250-200-DZ
- Type
- BRIGHTKING
- Minimum package
- 500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Brightking
- Electronic Component
- BK250-200-DZ
- Electronic Component
- 1
- Package
- Through-hole, P=5.1mm
- Electronic Component
- Resettable Fuse
- Electronic Component
- 0.673g
- Pitch
- 5.1mm
- Electronic Component
- 1
- Electronic Component
- BM0257695066
- Operating Temperature
- 20℃~+85℃
- Voltage Rating(Vmax)
- 250V
- Power(Pd)
- 1W
- Current(Imax)
- 10A
- Electronic Component
- Electronic Component
- Electronic Component
- 500
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
BK250-200-DZ 产品概述
一、产品简介
BK250-200-DZ 为 Brightking（台湾君耀）出品的自恢复式保险丝（PTC resettable fuse），采用插件封装，脚间距 5.1mm（P=5.1mm）。额定耐压 250V，适用于需要重复过流保护且便于维修更换或无需更换熔断体的电路设计。结构紧凑，响应灵敏，适合多种低功耗及中等电流保护场景。
二、主要技术参数
- 耐压 (Vmax)：250V
- 最大电流 (Imax)：10A
- 保持电流 (Ihold)：200mA（不动作时可持续的最大电流）
- 跳闸电流 (Itrip)：400mA（在该电流附近开始进入高阻态）
- 消耗功率 (Pd)：1W（典型功耗/热耗散指标）
- 初始态阻值 (Rmin)：3Ω
- 跳断后阻值 (R1max)：6Ω（进入保护态后的最大阻值）
- 工作温度：-20℃ ~ +85℃
- 封装：插件（DIP），脚间距 5.1mm
三、工作原理与特性
该器件基于正温度系数（PTC）材料：在正常工作电流下保持低阻状态；当电流超过跳闸电流时，器件内部发热导致阻值显著上升，从而限制电流，保护后端电路。过流解除后，随着温度下降，阻值恢复到初始状态，实现自恢复保护。特点包括无需更换、响应重复性好、对瞬时过流有抑制能力。
四、典型应用场景
- 开关电源与适配器的二次侧过流保护
- 通信设备、路由器、机顶盒等电子产品的电源保护
- 电池管理与充电电路（作为辅保护）
- 小功率电机、继电器线圈及信号电路的过流保护
- 家用及工业控制板卡的局部保护
五、安装与使用注意事项
- 选型时保证正常工作电流显著低于 Ihold（200mA），以避免误触发；同时 Itrip（400mA）应低于可接受的故障电流峰值。
- 工作环境温度和散热条件会影响触发特性，高温下容易提前动作，应在高温环境下进行必要的降额设计。
- Pd=1W 为热耗散参考，长时间接近此功率工作会影响寿命与恢复性能，建议留有余量并保持良好通风。
- 虽能在 250V 额定下使用，但在涉及安全认证或作为主断路保护时，应根据标准和系统风险评估是否需要配合传统熔断器或断路器使用。
- 插件安装时注意焊接工艺，避免长时间高温焊接造成本体损伤。
六、选型建议与可靠性
BK250-200-DZ 适合常态工作电流远低于 200mA、偶发短路或过载会达到数百毫安的场景。对于频繁或长期高过流事件，应考虑更高额定或不同类型的保护器件。设计时应结合环境温度、散热条件及峰值电流特性进行验证，确保保护动作与恢复行为满足系统要求。若需满足特定安全认证或更高的电气强度，请咨询供应商提供相关认证资料。
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