The **RSS-243.3/P-R** is a high-performance, isolated DC/DC converter manufactured by **RECOM Power**. This component is specifically designed for industrial applications requiring high power density and isolation in a compact surface-mount package. --- ### 1. Key Technical Specifications The part number follows a specific nomenclature that defines its electrical characteristics: | Feature | Specification | | :--- | :--- | | **Input Voltage Range** | 18V - 36V DC (24V Nominal) | | **Output Voltage** | 3.3V DC | | **Output Current** | 303mA | | **Power Rating** | 1 Watt | | **Isolation Voltage** | 1kV DC (standard) | | **Efficiency** | ~75% - 80% | | **Package Type** | SMT (Surface Mount Technology) | --- ### 2. Part Number Breakdown Understanding the suffix and prefix codes is essential for sourcing and PCB design: * **RSS**: Short-style SMD Isolated DC/DC Converter. * **24**: Nominal Input Voltage (24V). * **3.3**: Nominal Output Voltage (3.3V). * **P**: Indicates **Short Circuit Protection** (continuous). * **R**: Indicates **Tape & Reel** packaging (for automated assembly). --- ### 3. Electronic Features & Protections * **Galvanic Isolation:** It provides 1kVDC isolation between the input and output stages, which is critical for breaking ground loops and protecting sensitive logic-level components from high-voltage transients on the supply rail. * **Short Circuit Protection (SCP):** The "P" version includes integrated protection that prevents the device from burning out if the output is accidentally grounded. * **No Minimum Load:** Unlike older unregulated converters, many modern RSS series units can operate under no-load conditions without a significant rise in output voltage. * **Operating Temperature:** Typically rated for **-40°C to +85°C** without derating, making it suitable for harsh environments. --- ### 4. Typical Applications This part is commonly used in the following scenarios: 1. **Industrial Controls:** Powering 3.3V microcontrollers from a standard 24V industrial bus. 2. **Sensor Interfaces:** Providing clean, isolated power to analog sensors to prevent noise interference. 3. **Communication Modules:** Powering isolated RS-485 or CAN bus transceivers. --- ### 5. Footprint and Mounting The **RSS-243.3/P-R** uses an SMD 14-pin (with some pins omitted) package. ```text Physical Dimensions (Approximate): Length: 12.75 mm Width: 10.70 mm Height: 6.70 mm ```