The **EB2-12TNUE-R** is a specific model of a miniature signal relay manufactured by KEMET (formerly NEC/Tokin). It belongs to the EB2 series, which is widely recognized for its high reliability and compact design in communication and electronic switching applications. --- ## 1. Technical Specifications The part number can be broken down to understand its specific electronic characteristics: | Parameter | Specification | | :--- | :--- | | **Series** | EB2 (Miniature Surface Mount Type) | | **Nominal Coil Voltage** | 12 VDC | | **Latch Type** | Double Coil Latching (T) | | **Contact Form** | 2 Form C (DPDT - Double Pole Double Throw) | | **Mounting Type** | Surface Mount (SMT) - Standard Type | | **Safety Standard** | UL/CSA Recognized | | **Packaging** | Tape and Reel (R) | --- ## 2. Key Features and Functions * **Double Coil Latching:** Unlike standard non-latching relays, this part uses two coils. One coil "sets" the contact position, and the other "resets" it. Once switched, it stays in that position without needing continuous power, making it highly energy-efficient. * **Compact Footprint:** Designed for high-density mounting on PCBs where space is at a premium. * **High Breakdown Voltage:** Offers excellent isolation between the coil and the contacts (usually 1000VAC for 1 minute). * **Low Power Consumption:** Because it is a latching relay, it only consumes power during the brief pulse required to flip the state. --- ## 3. Physical & Contact Information The device is designed for low-level signal switching rather than high-power loads. ### Contact Ratings * **Max Switching Power:** 30W / 62.5VA * **Max Switching Voltage:** 220VDC / 250VAC * **Max Switching Current:** 1A * **Contact Material:** Silver alloy with gold overlay (for low contact resistance and high reliability). ### Typical Applications * **Telecommunications:** Switching test equipment and PABX systems. * **Measurement Instruments:** Oscilloscopes and signal generators. * **Security Systems:** Alarm control panels. * **Medical Equipment:** Low-power diagnostic signal routing. --- ## 4. Internal Wiring Diagram (Simplified) The EB2-12TNUE is a **Double Coil Latching** relay. The pinout typically follows this logic: ```text [Pin 1] (+ Set) ----(Coil 1)---- [Pin 5/6] (- Common) [Pin 10] (+ Reset) --(Coil 2)---- [Pin 5/6] (- Common) ``` *Applying a pulse to the Set coil moves the contacts; applying a pulse to the Reset coil moves them back.*