The **HWS100A-12/R** is a high-quality, industrial-grade AC-DC single-output switching power supply manufactured by TDK-Lambda. This specific model is part of the HWS "A" series, known for its high efficiency and extreme reliability. --- ### 1. Key Technical Specifications The following table outlines the primary electrical characteristics of the HWS100A-12/R: | Parameter | Specification | Details | |:---|:---|:---| | **Input Voltage** | 85 - 265 VAC / 120 - 370 VDC | Universal Input (Global usage) | | **Output Voltage** | 12 VDC | Adjustable via front potentiometer | | **Output Current** | 8.5 A | Maximum load capability | | **Output Power** | 102 W | Total rated wattage | | **Efficiency** | ~86% - 88% | Depending on input voltage | | **Cooling** | Convection | No internal fan (silent operation) | | **Remote ON/OFF** | Yes | Denoted by the **/R** suffix | --- ### 2. Electronic Components & Internal Design The internal architecture of the HWS100A series focuses on longevity and thermal management: * **Active Power Factor Correction (PFC):** Built-in circuitry ensures compliance with IEC61000-3-2 standards, reducing harmonic current and improving electrical efficiency. * **Electrolytic Capacitors:** TDK-Lambda uses high-grade capacitors rated for long life (often up to 10 years depending on the load environment). * **Safety Features:** * **Over-Current Protection (OCP):** Shuts down or limits current if a short circuit occurs. * **Over-Voltage Protection (OVP):** Protects connected sensitive electronics from voltage spikes. * **Thermal Protection:** Reduces output or shuts down if internal temperatures exceed safety limits. --- ### 3. The "/R" Suffix Meaning In the TDK-Lambda nomenclature, the **/R** identifies a specific feature: * **Remote ON/OFF:** This model includes additional terminals that allow an external signal (5V to 24V) to turn the power supply output on or off without disconnecting the AC mains. * **Usage:** This is critical for automated systems where a PLC or microcontroller needs to control power sequences. --- ### 4. Physical Layout & Mounting The unit is housed in a robust metal frame designed for industrial environments: * **Terminal Block:** Screw terminals for AC input (L, N, Ground) and DC output (+V, -V). * **Potentiometer:** A small trimmer (V.ADJ) allows the 12V output to be tuned (typically ±20%). * **LED Indicator:** A green "ON" LED confirms the presence of DC output.