The **HTB-44I-R** is a specific electronic component, typically categorized as a **Panel Mount Fuse Holder**. It is part of the HTB series manufactured by **Eaton (formerly Bussmann)**. This part is designed to hold 5x20mm fuses and is widely used in industrial and consumer electronics for circuit protection. --- ### Technical Specifications Below are the primary electronic and physical characteristics of the HTB-44I-R: | Feature | Specification | | :--- | :--- | | **Current Rating** | 20 Amps (UL), 16 Amps (VDE/SEMKO) | | **Voltage Rating** | 250 Volts AC | | **Fuse Size Accepted** | 5mm x 20mm | | **Mounting Type** | Panel Mount (Nut retained) | | **Terminal Type** | 3/16" Quick Connect / Solder Terminals | | **Body Material** | High-temperature thermoplastic | | **Knob Type** | Low Profile, In-line (Screwdriver slot) | | **Operating Temp** | -30°C to +85°C | --- ### Component Breakdown #### 1. The Body (Housing) The body is constructed from a flame-retardant thermoplastic that provides high insulation resistance. It features a "Double D" hole mounting pattern to prevent the holder from rotating in the panel during installation or fuse replacement. #### 2. Terminals (Electrical Interface) The "44" in the part number indicates the terminal configuration: * **Right-Angle Terminals:** The terminals exit at a 90-degree angle to the body, which is ideal for tight spaces where depth behind the panel is limited. * **Material:** Usually tin-plated brass to ensure high conductivity and corrosion resistance. #### 3. The Cap (Knob) The "I" in the part number refers to the **In-line/International** style cap: * This cap is designed to meet international safety standards (IEC). * It requires a screwdriver to open (finger-proof), which prevents accidental contact with live parts. #### 4. Rear Nut and Gasket The unit is secured to the panel using a plastic hex nut. Most HTB series parts include a rubber washer/gasket to provide a degree of sealing against the panel surface. --- ### Safety and Compliance The HTB-44I-R is engineered to meet global safety requirements, making it suitable for products sold in multiple regions: * **UL Recognized:** Component File E14853. * **CSA Certified:** Class 6225-01. * **VDE Approved:** Ensuring compliance with European safety standards.