The part number **90-2000-R** typically refers to a specialized electronic component, most commonly identified as a **high-frequency current sense transformer** manufactured by companies like **Pulse Electronics** (or similar magnetic component vendors). These parts are designed to monitor current in switched-mode power supplies (SMPS) without interrupting the circuit or causing significant power loss. --- ### Technical Specifications Below is a breakdown of the typical electronic characteristics of the 90-2000-R series: | Feature | Specification | | :--- | :--- | | **Turns Ratio** | 1:100 (Common) | | **Current Rating** | Up to 20A - 35A (Application dependent) | | **Frequency Range** | 50 kHz to 500 kHz+ | | **Secondary Inductance** | ~14.0 mH (Minimum) | | **Secondary Resistance** | ~1.40 Ohms (Maximum) | | **Isolation Voltage** | 1500 Vrms | --- ### Key Internal Components 1. **Toroidal or Planar Core:** Usually made of ferrite material with high permeability to ensure accurate magnetic coupling at high frequencies. 2. **Primary Winding:** In many cases, the "primary" is simply a bus bar or a wire passed through the center hole of the transformer. 3. **Secondary Winding:** Fine copper wire wrapped around the core. The "2000" in some naming conventions refers to the turns ratio, though in the 90-2000-R, it often denotes a specific design iteration within the 90-series. 4. **Terminations:** Surface Mount (SMD) or Through-Hole pins, depending on the specific package suffix. --- ### Applications The 90-2000-R is vital in circuits where efficiency and protection are priorities: * **Over-current Protection:** Detecting a surge and triggering a shutdown. * **Feedback Control:** Providing a signal to the PWM controller to regulate the output voltage. * **Load Monitoring:** Measuring how much power a specific branch of a data center or industrial machine is consuming. ### Meaning of the "R" Suffix In modern electronics manufacturing, the **-R** suffix almost always indicates: * **RoHS Compliant:** The part is lead-free and meets environmental safety standards. * **Tape & Reel:** Occasionally used to denote the packaging method for automated pick-and-place assembly. ---