The **HVS-15-R** typically refers to a high-voltage, surface-mount reed relay, often manufactured by companies like Standex Electronics (OKI). These components are designed to provide high galvanic isolation while maintaining a small footprint. ### 1. Key Electronic Specifications Below are the typical electronic characteristics for the HVS series (specifically the 15kV rated variants): | Parameter | Typical Value | Unit | | :--- | :--- | :--- | | **Contact Form** | Form A (Normally Open) | - | | **Max Switching Voltage** | 10,000 - 15,000 | VDC/Peak AC | | **Max Switching Current** | 3.0 | Amps | | **Max Carry Current** | 5.0 | Amps | | **Isolation Voltage (Contacts to Coil)** | 15,000 | VDC | | **Contact Resistance** | < 150 | mΩ | --- ### 2. Internal Components & Construction The HVS-15-R is composed of several critical electronic and mechanical parts: * **Reed Switch:** The core component consisting of two ferromagnetic blades (reeds) hermetically sealed in a glass envelope filled with inert gas. * **Electromagnetic Coil:** A copper wire winding wrapped around the glass tube. When energized, it creates a magnetic field that pulls the reeds together to close the circuit. * **Encapsulation (Resin):** The internal parts are molded in a high-dielectric epoxy resin. This is crucial for the "15-R" designation, as it prevents arcing across the surface of the component at high voltages. * **Magnetic Shielding:** Many HVS models include an internal mu-metal shield to prevent interference between adjacent relays on a PCB. --- ### 3. Pin Configuration and Driving To operate the HVS-15-R, the electronic circuit must provide the correct "Must Operate" voltage to the coil. ```python # Conceptual logic for driving an HVS-15-R via a Microcontroller # Requires a transistor/MOSFET driver due to coil current draw coil_voltage = 12.0 # Common coil rating (VDC) relay_state = "OPEN" def toggle_high_voltage(command): if command == "ON": apply_voltage_to_coil(coil_voltage) relay_state = "CLOSED" else: cut_voltage() relay_state = "OPEN" ``` --- ### 4. Common Applications * **Medical Electronics:** Used in defibrillators and imaging equipment where high-voltage isolation is life-critical. * **Test and Measurement:** Used in Cable Testers and "Hipot" (High Potential) testers to check insulation integrity. * **Renewable Energy:** Monitoring solar array isolation and battery storage systems.