The **CTJC1008-R015J** is a high-precision, low-resistance chip resistor commonly used for current sensing applications. Below is a detailed breakdown of its specifications, part numbering, and technical characteristics. --- ## 1. Part Number Breakdown To understand this component, we can decode the alphanumeric string: | Segment | Code | Meaning | | :--- | :--- | :--- | | **Series** | CTJC | Current Sensing Chip Resistor (Metal Plate/Alloy) | | **Size** | 1008 | Case Size: 1.0" x 0.08" (Standard Metric 2520) | | **Resistance** | R015 | 0.015 Ohms (15mΩ) | | **Tolerance** | J | ±5% Resistance Tolerance | --- ## 2. Technical Specifications The "CTJC" series is typically designed for surface-mount technology (SMT) and features a metal alloy construction to handle high current loads. ### Key Electrical Characteristics * **Resistance Value:** 15 mΩ (Milliohms). * **Tolerance:** ±5% (Standard for non-precision power monitoring). * **Material:** Metal foil or alloy construction (provides high stability). * **Inductance:** Low ESL (Equivalent Series Inductance) design to prevent signal noise. * **Operating Temperature:** Generally ranges from -55°C to +155°C. --- ## 3. Physical Features & Construction | Feature | Description | | :--- | :--- | | **Termination** | Sn (Tin) over Nickel plating for high solderability. | | **Body Structure** | Flame retardant molding/coating for safety. | | **Marking** | Usually marked with the resistance code (R015). | | **Mounting** | SMD (Surface Mount Device) compatible with automated pick-and-place. | --- ## 4. Typical Applications Because this is a **current sense resistor**, it is placed in series with a load to measure the voltage drop ($V = I \times R$), allowing a microcontroller or IC to monitor current flow. * **Power Management:** DC-DC converters and switching power supplies. * **Battery Monitoring:** Battery management systems (BMS) for laptops or EVs. * **Motor Control:** Detecting over-current conditions in small motors. * **Consumer Electronics:** Power adapters and chargers. ---