220V常开无源高压磁性接近开关WB-SF121RDO
产品概述
WB-SF121RDO是一款220V常开型无源高压磁性接近开关，采用磁感应原理实现非接触式检测。该产品设计紧凑，适用于工业自动化、智能家居、安防系统等多种场景，能够可靠检测磁性物体的接近或远离状态。作为无源器件，它无需额外供电即可工作，简化了安装和布线流程。49
技术特点
该开关采用高压设计，支持220V交流电压直接接入，具备良好的电气隔离性能。常开型结构在磁铁接近时导通，远离时断开，响应时间快且动作稳定。感应距离可调范围1-40mm（具体取决于配套磁铁的磁力强度），工作温度覆盖-20至75摄氏度，适应潮湿环境（35%-95%RH）。外壳采用耐用材料封装，防护性能优异，确保在复杂工况下长期稳定运行。217
功能描述
WB-SF121RDO通过内置磁敏元件实现信号转换，当磁性物体进入感应区域时，内部触点闭合输出信号；物体离开后触点自动复位。产品支持直接控制220V负载，最大开关电流1A，适用于门禁控制、设备位置检测、自动化流水线等场景。引线采用300mm长UL认证线材，安装方式灵活，可嵌入式或表面固定。516
应用场景
典型应用包括智能照明系统的衣柜开关、工业设备的门状态监测、传送带物料检测等。其无源特性特别适合需避免电气干扰的场合，如精密仪器周边。高压设计使其能直接接入市电系统，减少中间继电器使用。配套磁铁可选低压/高压通用型，白色或标准款满足不同美观需求。111
Product Overview
The WB-SF121RDO is a 220V normally open passive high-voltage magnetic proximity switch utilizing magnetic induction for contactless detection. With compact design, it suits industrial automation, smart home systems, and security applications, reliably sensing the approach or departure of magnetic objects. As a passive device, it operates without external power supply, simplifying installation. 1925
Technical Features
This switch features high-voltage compatibility (220V AC direct connection) with excellent electrical isolation. The NO (Normally Open) mechanism ensures fast response (<2.5ms) and stable actuation when magnets approach. Adjustable sensing range (1-40mm, magnet-dependent) and wide operating temperature (-20~75°C) with humidity resistance (35%-95% RH) enhance environmental adaptability. Durable housing provides robust protection for long-term reliability. 1820
Functional Description
Through built-in magnetic sensing components, the WB-SF121RDO triggers signal output upon detecting magnetic targets: contacts close within sensing range and reset automatically afterward. Capable of directly switching 220V loads (1A max), it’s ideal for access control, equipment positioning, and assembly lines. Includes 300mm UL-certified cables for flexible mounting options. 1013
Applications
Widely used in smart lighting (e.g., wardrobe switches), industrial door status monitoring, and conveyor belt object detection. Its passive nature eliminates electrical interference risks in sensitive environments like precision instruments. High-voltage design allows direct mains integration, reducing relay dependencies. Optional universal magnets (low/high voltage) and white/standard styles meet aesthetic needs. 37
220V常开无源高压磁性接近开关WB-SF121RDO
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