The **SVB-5FW-R/K** is a specific model within the series of high-performance **Signal Relays** manufactured by **Sanyou** or similar specialized relay manufacturers. These are frequently used in telecommunications, security systems, and medical equipment. --- ### 1. Technical Specifications Below are the primary electrical and physical parameters for the SVB-5FW-R/K: | Parameter | Specification | | :--- | :--- | | **Contact Form** | 1 Form C (SPDT - Single Pole Double Throw) | | **Nominal Coil Voltage** | 5V DC | | **Max Switching Voltage** | 250VAC / 30VDC | | **Max Switching Current** | 1A to 2A (Typical for signal class) | | **Coil Power Consumption** | Approx. 150mW to 200mW (Sensitive type) | | **Dielectric Strength** | 1,000VAC (between open contacts) | | **Terminal Type** | PCB Mounting (Through-hole) | --- ### 2. Breakdown of the Model Code The alphanumeric suffix provides details on the internal construction and materials: * **SVB**: Series designation (Subminiature Signal Relay). * **5**: Indicates the **Nominal Coil Voltage** (5 Volts DC). * **FW**: Often indicates the sealing type (e.g., Wash-tight/Sealed) and the contact material (often Gold-plated Silver alloy). * **R/K**: * **R**: Generally refers to the packaging type (Reel) or a specific ROHS compliance marker. * **K**: Frequently denotes a "High Sensitivity" coil or a specific pin layout variation. --- ### 3. Key Electronic Components & Materials * **The Coil:** A copper wire winding around a core. When 5V is applied, it creates an electromagnetic field to move the armature. * **Contacts:** Usually made of **Silver Nickel (AgNi)** or **Silver Cadmium Oxide**, often plated with **Gold**. The gold plating ensures low contact resistance, which is vital for switching low-level signals (dry circuits). * **The Housing:** Encased in a high-temperature plastic (PBT) that is flame retardant (UL94V-0 rated). * **Spring Mechanism:** A precision-engineered metallic leaf spring that ensures the "Form C" (changeover) action is crisp and reduces "contact bounce." --- ### 4. Typical Applications Because of its small footprint and 5V logic-level compatibility, this part is found in: 1. **Modems and Bridges:** For line switching. 2. **PLC Controllers:** Used as an output interface for low-power signals. 3. **Security Panels:** For triggering alarms or sensors. 4. **Test Equipment:** For signal routing in automated test environments. ---