## Technical Overview: TDK-Lambda HWS100A-5/R The **HWS100A-5/R** is a 100-watt, industrial-grade AC-DC single-output power supply manufactured by TDK-Lambda. It belongs to the HWS-A series, known for high reliability and a compact footprint. --- ### 1. Key Specifications The table below summarizes the core electrical and physical characteristics of this specific model: | Parameter | Specification | | :--- | :--- | | **Output Voltage** | 5V DC | | **Max Output Current** | 20A | | **Max Power Rating** | 100 Watts | | **Input Voltage Range** | 85 - 265 VAC (Universal Input) | | **Efficiency** | 82% - 84% (Typical) | | **Cooling** | Convection Cooled (No fan required) | | **Mounting Type** | Chassis Mount (Enclosed) | | **Operating Temp** | -10°C to +70°C | --- ### 2. Electronic Features and "R" Suffix The model name contains specific identifiers that dictate its functionality: * **HWS100A**: Represents the series (HWS-A) and the power rating (100W). * **5**: Indicates the nominal output voltage (5 Volts). * **-R (Remote On/Off)**: The "/R" suffix is a specific electronic feature. This allows the user to turn the power supply output on or off using an external signal without disconnecting the AC input. * *Circuitry:* It typically uses an internal opto-coupler to isolate the control signal from the output. --- ### 3. Internal Components and Protection The internal design focuses on industrial longevity and safety: * **PFC Circuitry**: Active Power Factor Correction is integrated to minimize harmonic distortion and comply with IEC61000-3-2. * **Overcurrent Protection (OCP)**: Constant current limiting with automatic recovery. * **Overvoltage Protection (OVP)**: Shuts down the unit if the output exceeds approximately 115-140% of the nominal voltage. * **Electrolytic Capacitors**: High-quality capacitors are used to ensure a long service life (often rated for 10 years or more under standard conditions). --- ### 4. Terminal Block Pinout The unit typically features a screw terminal interface: | Pin | Function | Description | | :--- | :--- | :--- | | **L, N** | AC Input | Line and Neutral connections | | **FG** | Frame Ground | Earth connection for safety | | **-V, +V** | DC Output | 5V Output terminals | | **-R, +R** | Remote Control | Terminals for the remote On/Off signal | | **V.ADJ** | Potentiometer | Allows fine-tuning of the 5V output (usually +/- 20%) |