## Overview of the EB2-24SNUE-R The **EB2-24SNUE-R** is a high-performance, miniature signal relay manufactured by **NEC/TOKIN** (now part of KEMET/YAGEO). It belongs to the EB2 series, which is specifically designed for surface-mount technology (SMT) and is widely used in telecommunications and test equipment. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Contact Form** | 2 Form C (DPDT - Double Pole Double Throw) | | **Coil Voltage (Nominal)** | 24 VDC | | **Coil Resistance** | 2880 $\Omega$ (Typical) | | **Nominal Operating Power** | 200 mW | | **Contact Rating** | 30W, 62.5VA (Max 220VDC / 250VAC) | | **Contact Current** | 1A (Maximum) | | **Latch Type** | Non-latching (Single side stable) | | **Mounting Type** | Surface Mount (SMT) - Gull wing leads | --- ### 2. Breakdown of the Model Code The part number can be deciphered as follows: - **EB2**: Series name (Miniature Signal Relay). - **24**: Nominal Coil Voltage (24V). - **S**: Slim type / Standard version. - **NUE**: Specific terminal shape and insulation properties (High breakdown voltage / SMT). - **-R**: Indicates packaging format (typically Tape & Reel for automated assembly). --- ### 3. Physical Features & Construction * **Miniature Size:** Occupies very little PCB real estate, making it ideal for high-density boards. * **Gull-Wing Leads:** The "NUE" designation usually points to the SMT lead shape, allowing for infrared or vapor phase soldering. * **High Insulation:** Offers high breakdown voltage between contacts and coil (usually 1500V AC). * **FCC Part 68 Compliance:** Meets the standard for telecommunication equipment regarding surge voltage. --- ### 4. Common Applications Due to its reliability and low power consumption, the EB2-24SNUE-R is commonly found in: 1. **Telecommunications:** Switching lines in PABX and modems. 2. **Measurement Equipment:** Signal switching in oscilloscopes and multimeters. 3. **Medical Electronics:** Low-power signal routing. 4. **Consumer Electronics:** Audio/Video signal switching. --- ### 5. Schematic Representation The relay utilizes a DPDT configuration. Below is a simplified representation of the internal connection: ```text [Coil] (Pin 1)---(Pin 12) <-- 24V DC applied here [Switches] (Pin 3) Common 1 <--> (Pin 4) NC / (Pin 5) NO (Pin 10) Common 2 <--> (Pin 9) NC / (Pin 8) NO ``` *(Note: Always verify pinouts with the manufacturer's datasheet as configurations can vary by sub-model.)*