The **R1SE-H2-R** is a high-performance, surface-mount (SMD) DC/DC converter manufactured by **RECOM Power**. It belongs to the R1SE series, which is specifically designed for cost-effective, isolated power distribution on circuit boards. --- ## 1. Technical Specifications The following table summarizes the core electronic characteristics of the R1SE-H2-R: | Parameter | Specification | | :--- | :--- | | **Output Power** | 1 Watt | | **Input Voltage** | 5V DC (Nominal) | | **Output Voltage** | 5V DC | | **Isolation Voltage** | 2kV DC / 1 Second (H2 Suffix) | | **Efficiency** | 70% - 75% (Typical) | | **Package Type** | SMD (8-pin / 10-pin footprint) | | **Operating Temp** | -40°C to +85°C (Full Load) | --- ## 2. Key Electronic Features ### A. Isolation (The "H2" Suffix) The "H2" in the part number signifies **High Isolation**. While standard R1SE models often provide 1kV DC isolation, the H2 variant provides **2kV DC**. This makes it suitable for: * Breaking ground loops. * Protecting sensitive logic-level components from high-voltage transients. ### B. Unregulated Output This part is an **unregulated converter**. This means the output voltage is not strictly fixed; it will vary slightly based on: 1. Changes in the input voltage. 2. The load current (voltage typically drops as load increases). ### C. Protection Circuitry * **Short Circuit Protection:** It features limited short-circuit protection (typically 1 second) to prevent immediate catastrophic failure during a fault. * **Internal Filter:** It includes basic internal filtering, though external capacitors are recommended for low-noise applications. --- ## 3. Physical & Mounting Characteristics The **"-R"** suffix indicates **Tape & Reel packaging**, designed for automated pick-and-place assembly lines. ### Pin Configuration (Typical) | Pin # | Function | Description | | :--- | :--- | :--- | | 1 | -Vin | Ground (Input) | | 2 | +Vin | Positive Input | | 4 | -Vout | Ground (Output) | | 5 | +Vout | Positive Output | | 3, 6, 7, 8 | NC | No Connection (Used for mechanical stability) | --- ## 4. Typical Applications * **Industrial Controls:** Isolating sensor data lines. * **RS485/RS232 Interface:** Providing isolated power to transceiver chips. * **Digital Circuits:** Separating noisy digital power from clean analog rails. ---