### Overview of W2SP-2C2-R/UL The **W2SP-2C2-R/UL** is a high-performance **Electromechanical Power Relay** typically manufactured by companies like **CIT Relay & Switch**. It is designed for high-density PC board mounting and is widely used in industrial controls, telecommunications, and security systems. --- ### Technical Specifications Below are the key electrical and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Contact Form** | DPDT (2 Form C) | | **Contact Rating** | 2A @ 30VDC / 0.5A @ 125VAC | | **Max Switching Voltage** | 220VDC / 250VAC | | **Max Switching Power** | 60W / 62.5VA | | **Coil Voltage Options** | 3VDC to 48VDC (standard) | | **Dielectric Strength** | 1000Vrms (between contacts) | | **Life Expectancy** | 100,000,000 operations (mechanical) | | **Approvals** | UL (Underwriters Laboratories) Recognized | --- ### Key Features and Electronic Design #### 1. Contact Configuration (DPDT) The "2C" in the part number denotes **2 Form C**, also known as **Double Pole Double Throw (DPDT)**. This allows the relay to switch two separate circuits simultaneously, providing a common terminal, a normally open (NO) terminal, and a normally closed (NC) terminal for each pole. #### 2. Sensitivity and Efficiency These relays are often designed as "Subminiature DIP" types. They are polarized and highly sensitive, meaning they require very little coil power (typically around 150mW to 200mW) to trigger the switch, making them suitable for direct drive by integrated circuits or transistors. #### 3. Sealed Construction The "R" suffix often refers to the **RoHS compliance** or a specific **Sealed** (Washable) construction. This protects the internal contacts from oxidation and allows the PCB to be cleaned with solvents after soldering without damaging the relay. #### 4. Gold-Plated Contacts To ensure low contact resistance and high reliability when switching low-level signals (dry circuits), the contacts are typically gold-over-silver-palladium. --- ### Typical Pinout Diagram (Bottom View) *Note: Always verify with the manufacturer datasheet as layouts can vary slightly by revision.* ```text +-----------------+ | 1 . . 6 | (1, 16: Coil Terminals) | 2 . . 7 | (4, 9: Common) | 3 . . 8 | (6, 11: Normally Open) | 4 . . 9 | (8, 13: Normally Closed) +-----------------+ ``` --- ### Applications * **Telecommunications:** PABX systems and modems. * **Security Systems:** Control panels and alarm triggers. * **Medical Equipment:** Low-power signal isolation. * **Test & Measurement:** Switching signal paths in automated test equipment.