The **EB2-24SNUL-R** is a high-performance miniature signal relay manufactured by **KEMET** (formerly NEC/Tokin). It belongs to the EB2 series, which is specifically designed for surface-mount applications requiring high reliability and low power consumption. --- ### ## 1. Technical Specifications The following table summarizes the key electrical and mechanical characteristics of the EB2-24SNUL-R: | Parameter | Specification | | :--- | :--- | | **Relay Type** | Non-latching (Monostable) | | **Contact Form** | DPDT (2 Form C) | | **Nominal Coil Voltage** | 24 VDC | | **Coil Resistance** | 4,114 $\Omega$ (approx.) | | **Nominal Power** | 140 mW | | **Max Switching Voltage** | 220 VDC / 250 VAC | | **Max Switching Current** | 1 A | | **Contact Material** | Silver alloy with gold alloy overlay | | **Mounting Type** | SMD (Surface Mount Device) | --- ### ## 2. Detailed Component Breakdown #### ### A. Contact System (DPDT) The **Double Pole Double Throw (DPDT)** configuration allows the relay to control two separate circuits simultaneously. The contacts are gold-plated, which ensures high reliability when switching low-level signals (dry circuits) by preventing oxidation. #### ### B. Coil Characteristics * **Voltage:** The "24" in the part number indicates it requires a 24V DC supply to energize the coil. * **Power Consumption:** At only 140mW, this relay is considered a low-power device, making it suitable for dense PCB layouts where heat dissipation is a concern. #### ### C. Mechanical Design * **Compact Size:** The EB2 series is known for its ultra-miniature footprint, saving significant board space. * **SMD Lead Shape:** The "-R" suffix typically refers to the lead shape and packaging (Tape & Reel), optimized for automated pick-and-place assembly. * **UL/CSA Safety Standards:** The "NU" in the part number signifies that the component is recognized by UL (Underwriters Laboratories) and CSA standards. --- ### ## 3. Common Applications Due to its signal-grade precision, the EB2-24SNUL-R is primarily used in: * **Telecommunications:** Switching lines in PABX and modems. * **Test & Measurement:** Routing signals in automated test equipment (ATE). * **Medical Equipment:** Low-power signal isolation. * **Consumer Electronics:** Audio/Video signal switching. --- ### ## 4. Pinout Logic While specific pin numbering depends on the datasheet orientation, the general DPDT internal structure is as follows: ```text (Top View) +-------------------+ | (1) (2) (3) (4) | <- Coil and Common pins | (8) (7) (6) (5) | <- Normally Closed/Open pins +-------------------+ ``` *(Note: Always refer to the KEMET EB2 series datasheet for the specific physical pin map before PCB routing.)*