The **HFE6-B/24-2HT1-R** is a high-power, polarized bistable (latching) magnetic relay commonly manufactured by Hongfa. It is designed for applications requiring high switching capacity and energy efficiency, such as smart meters or power distribution units. --- ## ### Technical Specifications | Parameter | Specification Details | | :--- | :--- | | **Relay Type** | Magnetic Latching (Bistable) | | **Coil Voltage** | 24 VDC | | **Contact Arrangement** | 2 Form A (DPST-NO) | | **Max Switching Current** | 60A | | **Max Switching Voltage** | 250 VAC | | **Contact Material** | AgSnO₂ (Silver Tin Oxide) | | **Coil Configuration** | Double Coil (Latching) | --- ## ### Key Features & Functionality ### 1. Magnetic Latching Mechanism Unlike standard relays that require continuous current to keep the contacts closed, this is a **bistable** relay. * **Set/Reset:** It only requires a short pulse of electricity to switch states. * **Energy Efficiency:** Once the state is changed, the relay remains in that position via a permanent magnet without consuming any power. ### 2. High Current Capacity With a **60A switching capability**, it is specifically engineered for heavy loads. The AgSnO₂ contact material is chosen for its excellent resistance to "contact welding" and material transfer during high-current arcs. ### 3. Dual Coil (24-2HT) The "2" in the suffix usually denotes a **double-coil** system: * **Coil 1:** Triggered to "Set" the relay. * **Coil 2:** Triggered to "Reset" the relay. * This simplifies the driving circuit compared to single-coil versions, which require reversing the polarity. --- ## ### Part Number Breakdown | Segment | Meaning | | :--- | :--- | | **HFE6** | Series Name (Hongfa Latching Relay) | | **B** | Version / Load Type | | **24** | Rated Coil Voltage (24V) | | **2** | Double Coil | | **H** | Contact Form (H = Form A / Normally Open) | | **T** | Contact Material (T = AgSnO₂) | | **1** | External Structure/Dimensions | | **R** | Environmental Protection (RoHS/Sealed) | --- ## ### Connection Diagram (Typical) ```text [Coil 1: SET] [Coil 2: RESET] o----| |----o o----| |----o + Pin - + Pin - (24V Pulse) (24V Pulse) [Load Side] Line In o-------/ -------o Load Out (Contact 1) Line In o-------/ -------o Load Out (Contact 2) ``` ---