## Overview of EB2-5SNUE-R The **EB2-5SNUE-R** is a specific type of **Miniature Signal Relay** manufactured by KEMET (formerly NEC). It belongs to the EB2 series, which is known for its compact size, high reliability, and low power consumption. This part is primarily used in telecommunications, testing equipment, and medical instrumentation. --- ### Technical Specifications The following table breaks down the core electrical and physical characteristics: | Parameter | Specification | | :--- | :--- | | **Relay Type** | Latching (Single Coil) | | **Contact Form** | DPDT (2 Form C) | | **Coil Voltage** | 5 VDC | | **Contact Rating** | 30W, 62.5VA (Max 220VDC / 250VAC) | | **Max Switching Current** | 1 Amp | | **Mounting Type** | Surface Mount (SMT) | | **Terminal Shape** | Gull-wing (Standard SMT) | | **Operating Temperature** | -40°C to +85°C | --- ### Key Features and Electronic Characteristics 1. **Latching Mechanism (Single Coil):** Unlike non-latching relays that require continuous power to stay engaged, the "SN" designation indicates this is a **single-coil latching** relay. A short pulse of current sets the relay, and it remains in that state without further power until a reverse polarity pulse is applied. 2. **Dielectric Strength:** The device is designed to withstand high voltages between the coil and contacts, typically around 1,000 VAC, ensuring safety in sensitive signal circuits. 3. **Low Power Consumption:** Because it is a latching relay, it is extremely energy-efficient, making it ideal for battery-operated devices. 4. **Contact Material:** The contacts are usually **Silver alloy with gold overlay**, which ensures low contact resistance and prevents oxidation, making it reliable for switching low-level signals (dry circuits). --- ### Pin Configuration and Application The EB2-5SNUE-R follows a standard DPDT (Double Pole Double Throw) footprint. * **Coil Pins:** Used to trigger the latching/unlatching state. * **Common (COM), Normally Open (NO), and Normally Closed (NC):** Duplicate sets for two independent circuits. #### Typical Applications * **Modems and Hubs:** Routing telecommunication signals. * **Measurement Equipment:** Switching between different test probes. * **Audio Equipment:** Signal routing where minimal interference is required. --- ### Comparison: Non-Latching vs. Latching (SN) | Feature | EB2-5NU (Non-Latching) | EB2-5SNU (Latching) | | :--- | :--- | :--- | | **Power Usage** | Constant when active | Pulse only (Very low) | | **State on Power Loss** | Returns to default (NC) | Remains in last state | | **Control Logic** | Simple High/Low | Pulse Polarity Control |