The **EE2-5SNUH-R6** is a high-performance, miniature signal relay manufactured by KEMET (formerly NEC/TOKIN). It belongs to the EE2 series, which is widely recognized for its reliability in telecommunications and low-signal switching applications. --- ## 1. Key Technical Specifications The model number provides specific details about its construction and electrical characteristics: | Feature | Specification | | :--- | :--- | | **Relay Type** | Miniature Signal Relay (Subminiature) | | **Contact Form** | 2 Form C (DPDT - Double Pole Double Throw) | | **Coil Voltage** | 5 VDC | | **Latching/Non-latching** | **Single Coil Latching** (Remains in last position after power is removed) | | **Switching Capacity** | 30W, 62.5VA (Max 220VDC / 250VAC) | | **Maximum Current** | 2 Amps | | **Terminal Type** | SMT (Surface Mount Technology) - Minimum Footprint | | **Dielectric Strength** | 1000 VAC (between open contacts) | --- ## 2. Deciphering the Part Number (EE2-5SNUH-R6) Each segment of the part number indicates a specific hardware attribute: * **EE2**: Series Name (Miniature Signal Relay). * **5**: Nominal Coil Voltage (5 Volts). * **S**: **Single Coil Latching** type. Unlike standard relays, it uses a pulse of energy to switch states and stays there without constant power. * **NU**: Standard Type (FCC Part 68 compliant, high breakdown voltage). * **H**: High-reliability type / Horizontal mount. * **R6**: Packaging specification (Embossed carrier tape for automated SMT pick-and-place). --- ## 3. Notable Features and Applications ### Key Advantages * **Power Efficiency**: Because it is a latching relay, it consumes zero power once the state is switched. This is ideal for battery-powered devices. * **Compact Size**: Occupies minimal PCB real estate. * **Low Power Consumption**: Requires a very low set/reset current. * **High Reliability**: Designed for millions of operations in low-level signal switching. ### Common Applications 1. **Telecommunications**: Switching phone lines, PBX systems, and modems. 2. **Test & Measurement**: Signal routing in oscilloscopes or automated test equipment (ATE). 3. **Medical Electronics**: Low-power switching in diagnostic portable devices. 4. **Audio/Video**: High-fidelity signal switching (minimal signal distortion). --- ## 4. Internal Wiring (Conceptual) As a **2 Form C (DPDT)** relay, it contains two independent sets of changeover contacts. When a 5V pulse is applied to the coil, both sets of "Common" (COM) pins move from the "Normally Closed" (NC) position to the "Normally Open" (NO) position and stay there magnetically.