The **4108R-1-R2** is a specific part number for a Resistor Network manufactured primarily by **Bourns**. It belongs to the 4100R series of Medium Profile Resistor Networks in a Single In-Line Package (SIP). --- ### 1. Key Technical Specifications | Parameter | Specification | |:---|:---| | **Package Type** | SIP (Single In-Line Package) | | **Number of Pins** | 8 Pins | | **Circuit Type** | Isolated (Type 1) | | **Resistance Value** | Determined by the suffix (e.g., 102 = 1kΩ) | | **Power Rating (per resistor)** | 0.25 Watts (at 70°C) | | **Operating Temperature** | -55°C to +125°C | | **Voltage Rating** | 100V (Maximum) | --- ### 2. Understanding the Part Number Code The part number is structured to define the physical and electrical characteristics of the component: * **41**: Model Series (Resistor Network). * **08**: Number of Pins (8 pins total). * **R**: Profile height (Medium Profile, approx. 4.7mm). * **1**: Circuit Configuration (Isolated Circuit). * **R2**: The "R2" notation often refers to specific resistance values or a placeholder for a 2nd resistance in dual-terminator configurations, but in standard 4108R-1 series, the value is usually a 3-digit code (e.g., 4108R-1-103). --- ### 3. Internal Circuit Configuration (Type 1) The **"-1"** designation indicates an **Isolated Circuit**. * In an 8-pin isolated network, there are **4 independent resistors**. * Pin 1 is connected to Pin 2 through a resistor. * Pin 3 is connected to Pin 4 through a resistor. * Pin 5 is connected to Pin 6 through a resistor. * Pin 7 is connected to Pin 8 through a resistor. * There is no common electrical connection between the pairs. ### 4. Common Applications * **Line Termination:** Reducing signal reflections in digital circuits. * **Pull-up/Pull-down:** Providing a stable logic level for multiple input pins. * **Current Limiting:** Limiting current for groups of LEDs or transistors. * **Space Saving:** Replacing 4 individual through-hole resistors with a single component to save PCB real estate. --- ### 5. Mechanical Dimensions The "R" (Medium Profile) series typically follows these dimensions: * **Height:** 4.70 mm (0.185 inches) * **Length:** Approx. 20.32 mm (0.800 inches) * **Lead Pitch:** 2.54 mm (0.100 inches) standard spacing.