The term **"1103"** in electronics most commonly refers to two distinct categories: **SMD Resistor Codes** and **Brushless Motors**. --- ## 1. SMD Resistor (Coding System) In surface-mount technology (SMD), "1103" is a four-digit code used to identify the resistance value of a high-precision resistor (typically 1% tolerance or better). ### How to calculate the value: | Digit | Meaning | Value | | :--- | :--- | :--- | | First 3 Digits | Significant Figures | 110 | | 4th Digit | Multiplier ($10^n$) | $10^3$ (1,000) | | **Total** | **Calculation** | **110,000 $\Omega$** | **Final Value:** 110k$\Omega$ (110 Kilohms) --- ## 2. 1103 Brushless Motors In the world of RC drones, micro-quadcopters (Whoops), and robotics, "1103" refers to the physical dimensions of a brushless DC motor. ### Physical Specifications: * **Stator Diameter:** 11 mm * **Stator Height:** 3 mm (03) ### Characteristics: | Feature | Typical Specification | | :--- | :--- | | **Weight** | 3g to 6g | | **KV Rating** | 6000KV to 15000KV | | **Input Voltage** | 1S to 3S LiPo (3.7V - 11.1V) | | **Propeller Size** | 1.6 inch to 2.5 inch | --- ## 3. Integrated Circuits (IC) Prefix While less common, "1103" appears in older or specific semiconductor catalogs: * **Intel 1103:** Historically significant as the first commercially available **DRAM** (Dynamic Random Access Memory) chip, released in 1970. It had a capacity of 1024 bits (1kb). --- ## Summary Comparison | Context | Category | Key Definition | | :--- | :--- | :--- | | **Passive Component** | Resistor | 110k Ohm precision resistor. | | **Power/Actuation** | Motor | Micro brushless motor for 2-inch drones. | | **Computing History** | Memory | The first commercial DRAM chip (Intel). |