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BHFUSE BSMD1812L-600-12V BSMD1812L
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- BHFUSE BSMD1812L-600-12V
- Type
- 1812
- Minimum package
- 1500 编带
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- BHFUSE
- Electronic Component
- BSMD1812L-600-12V
- Electronic Component
- 1
- Package
- 1812
- Electronic Component
- Resettable Fuse
- Electronic Component
- 0.164g
- Electronic Component
- 1
- Electronic Component
- 20s
- Electronic Component
- BM0228072341
- Operating Temperature
- 40℃~+85℃
- Voltage Rating(Vmax)
- 12V
- Power(Pd)
- 2W
- Current(Imax)
- 50A
- Electronic Component
- Electronic Component
- Electronic Component
- 1500
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
BSMD1812L-600-12V 产品概述
BSMD1812L-600-12V 是佰宏（BHFUSE）出品的一款 1812 封装自恢复保险丝（PolySwitch），适用于 12V 及以下电源系统的过流和短路保护。器件在正常电流下表现为很低的电阻，发生异常时通过材料发热增阻实现限流，故障解除后可自动恢复，便于重复使用与维护。
一、主要技术参数
- 型号：BSMD1812L-600-12V（1812 封装）
- 品牌：BHFUSE（佰宏）
- 初始态阻值 Rmin：0.8 mΩ
- 跳断后阻值 R1max：10 mΩ
- 耐压 Vmax：12 V
- 保持电流 Ihold：6 A
- 跳闸电流 Itrip：12 A（动作时间 20 s）
- 最大电流 Imax：50 A
- 最大耗散功率 Pd：2 W
- 工作温度范围：-40 ℃ ~ +85 ℃
二、产品特点与工作原理
- 低导通阻抗：初态电阻仅 0.8 mΩ，适合大电流、低压降场景，减少正常工作中的功率损耗。
- 可重复自恢复：当电流超过跳闸阈值时，器件升温并迅速增大电阻以限制电流，故障消除后自动冷却恢复导通。
- 快速响应与明显限流：Itrip=12A，典型动作时间 20s（与实际环境温度和PCB热耦合相关）。
- 适配 12V 系统：Vmax=12V，适用于车载 12V 电源、通信设备、工控电源等低压系统的保护。
三、应用建议与选型注意
- 选型原则：Ihold 应大于正常工作电流，建议留有适当裕量以避免误动作；Itrip 应低于可允许的故障电流以保护元件和线路。
- 热环境影响：动作时间与 Itrip 会受环境温度和周围散热条件影响，高温下更易跳闸，布局时应考虑热源与散热路径。
- 电压限制：本型号适用于最高 12V 的电源系统，超出该电压可能损坏器件或影响动作特性。
- 余量与并联：若需通过更大持续电流，可考虑并联多个器件，但需注意电流分配不均可能带来的风险。
四、安装与可靠性
- 封装与焊接：1812 SMD 封装，兼容常规回流焊工艺；推荐遵循供应商的回流温度曲线以避免热损伤。
- PCB 布局：尽量靠近电源入口或被保护器件放置，优化铜箔散热以控制器件温升。
- 存储与使用：避免潮湿、高温环境存储，使用前按常规进行外观检查。长期工作建议进行热循环评估以确保可靠性。
五、检验与维护
- 出厂检测：应进行初始阻值、动作电流与动作时间等参数测试；到货后可抽检确认一致性。
- 现场排查：若频繁跳闸，应排查系统是否存在持续过流或短路，并确认环境温度是否超出规格。自恢复特性虽然减少维护，但不应作为长期代替过载保护的唯一手段。
总结：BSMD1812L-600-12V 以其低阻抗、高耐受电流和可自恢复特性，适合需要多次过流保护且空间受限的 12V 电源系统。选用时应综合考虑工作电流、热管理和电压限制以确保长期稳定可靠。
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