The **4-HB6-R** is a specific electronic component belonging to the **Subminiature Fuse** category, commonly produced by manufacturers like Bel Fuse. It is designed for PCB (Printed Circuit Board) mounting to protect circuits against overcurrent conditions. --- ### 1. Technical Specifications Below are the primary electrical and physical characteristics of the 4-HB6-R: | Feature | Specification | | :--- | :--- | | **Part Number** | 4-HB6-R | | **Component Type** | Radial Lead Micro Fuse | | **Current Rating** | 6 Amperes (6A) | | **Voltage Rating (AC)** | 250V | | **Voltage Rating (DC)** | 63V - 125V (Varies by sub-series) | | **Characteristic** | Fast-Acting (F) | | **Package / Case** | Radial (Cylindrical or Rectangular body) | | **Termination Style** | Through-Hole (PCB Leads) | | **Compliance** | RoHS 6 Compliant | --- ### 2. Key Internal Components The 4-HB6-R is composed of several critical electronic and material elements: * **Fuse Element:** A precision-calibrated wire or metallic strip designed to melt at exactly 6A of sustained current. * **Encapsulation:** A thermoplastic or ceramic body that houses the element, providing high insulation resistance and arc-quenching capabilities. * **Lead Wires:** Tin-plated copper leads designed for wave soldering. * **Marking:** The body is laser-etched with the current rating (6A) and safety agency logos (UL, VDE, etc.). --- ### 3. Functional Application The "Fast-Acting" nature of this fuse means it is designed to open very quickly once the current threshold is exceeded. Unlike "Slow-Blow" fuses, it does not tolerate temporary surges. **Common Use Cases:** 1. **Consumer Electronics:** Power supplies for laptops, printers, and monitors. 2. **LED Lighting:** Protecting driver circuits from internal component failure. 3. **Industrial Controls:** Protecting delicate PLCs and sensor inputs. 4. **Battery Chargers:** Preventing fire hazards during a short-circuit event. --- ### 4. Part Number Breakdown While nomenclature varies slightly by manufacturer, the code typically breaks down as follows: * **4:** Series family (Standard radial subminiature). * **HB:** High Breaking capacity or specific body style. * **6:** The Current Rating (6 Amps). * **-R:** Indicates RoHS (Restriction of Hazardous Substances) compliance. ---