## Overview of the Hirose DF1B-R Series The **DF1B-R** is a specific series of 2.5mm pitch discrete wire connectors manufactured by **Hirose Electric (HRS)**. The "R" designation typically refers to the **In-line Plug** or the **IDC (Insulation Displacement Connector)** variants within the DF1B ecosystem. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Pitch** | 2.5 mm | | **Current Rating** | 3A (max) per contact | | **Voltage Rating** | 250V AC/DC | | **Operating Temperature** | -35°C to +85°C | | **Wire Size (AWG)** | 22 AWG to 28 AWG | | **Termination Style** | IDC (Insulation Displacement) or Crimp | --- ### 2. Major Components and Anatomy The DF1B-R series is modular, meaning it consists of several parts that must be ordered separately to form a complete connection: 1. **Connector Housing (DF1B-Rxx):** * The plastic shell that holds the contacts. * Available in various positions (usually 2 to 20 pins). * Designed for "In-line" applications (wire-to-wire). 2. **Contacts (DF1B-xxxx):** * **IDC Type:** Allows for fast termination without stripping the wire. * **Crimp Type:** Requires stripping the wire and using a crimping tool for high-reliability connections. 3. **Retainers (DF1B-xxRS):** * An optional secondary lock that ensures contacts are fully seated and cannot be pulled out by vibration. --- ### 3. Features and Advantages * **In-line Connection:** Unlike headers that must be soldered to a PCB, the DF1B-R allows you to connect two sets of wires together in mid-air. * **Dual Termination Methods:** You can choose between **IDC** (fast, mass production) or **Crimp** (durable, repairable). * **Safety Lock:** The housing features a positive locking mechanism that produces a "click" when the male and female parts are correctly mated. * **Mis-insertion Prevention:** The shape of the housing prevents it from being plugged in backwards. --- ### 4. Part Number Breakdown Example When searching for these parts, the nomenclature usually follows this pattern: `DF1B - 10 R - 2.5 / IDC` * **DF1B:** Series Name * **10:** Number of positions (pins) * **R:** Application type (In-line Plug/Receptacle) * **2.5:** Pitch distance in millimeters * **IDC:** Termination method (if applicable) --- ### 5. Common Applications * **Industrial Equipment:** Control panels and internal wiring. * **Office Automation:** Printers and photocopiers. * **Consumer Electronics:** Power supply connections inside appliances. * **Automotive:** Non-critical interior lighting or sensor wiring.