The **N4B-R** is a specific electronic component primarily associated with the **JST (Japanese Solderless Terminals)** NR series. It is a connector header designed for PC board mounting, commonly used in signal transmission and power distribution in consumer electronics. --- ### 1. Technical Specifications The N4B-R is a wire-to-board connector header. Below are the key technical parameters: | Feature | Specification | | :--- | :--- | | **Series** | JST NR Series | | **Number of Circuits** | 4 Positions | | **Pitch (Spacing)** | 2.5 mm | | **Orientation** | Top Entry (Vertical) | | **Current Rating** | 2A AC/DC | | **Voltage Rating** | 250V AC/DC | | **Contact Material** | Phosphor Bronze (Tin-plated) | | **Housing Material** | Nylon 66 (UL94V-0 rated) | --- ### 2. Key Components & Construction The N4B-R consists of several critical parts that ensure electrical connectivity and mechanical stability: * **Wafer (Housing):** The plastic body that holds the pins. It is usually made of Nylon 66, which provides high heat resistance during soldering. * **Pins/Posts:** Four square pins made of tin-plated phosphor bronze. These are the conductive elements that mate with the female socket. * **Locking Mechanism:** The "R" in the part number often signifies a specific variation, but the NR series generally features a friction-lock mechanism to prevent accidental disconnection due to vibration. --- ### 3. Part Number Breakdown Understanding the nomenclature helps in identifying its characteristics: | Code | Meaning | | :--- | :--- | | **N** | NR Series identifier | | **4** | Number of circuits (4 pins) | | **B** | Type (Usually indicates "Board" mount or a specific base shape) | | **R** | Color/Variation (Often indicates "Red" or a specific packaging/orientation code) | --- ### 4. Typical Applications Because of its small pitch and reliable connection, the N4B-R is used in: 1. **Home Appliances:** Control boards for microwaves or washing machines. 2. **Office Equipment:** Internal wiring for printers and scanners. 3. **Industrial Controls:** Signal routing for sensors and small motors. 4. **LED Lighting:** Powering small LED arrays. --- ### 5. Installation Note When soldering the N4B-R to a PCB, ensure the hole diameter is approximately **0.9mm to 1.0mm**. Since it is a "Top Entry" type, the wires will plug in perpendicular to the surface of the circuit board.