The **HTB-44M-R** is a high-performance, panel-mount fuse holder manufactured by **Eaton (Bussmann Series)**. It is designed for 5mm x 20mm cartridges and is widely used in industrial and consumer electronics to provide overcurrent protection. --- ### ## Technical Specifications The following table outlines the primary electrical and mechanical characteristics of the HTB-44M-R: | Parameter | Specification | | :--- | :--- | | **Part Number** | HTB-44M-R | | **Fuse Size Accommodated** | 5mm x 20mm | | **Current Rating** | 16 Amps (UL/CSA), 10 Amps (VDE) | | **Voltage Rating** | 250 Volts AC | | **Terminal Type** | 3/16" Quick Connect / Solder Terminals | | **Mounting Type** | Panel Mount (Nut retained) | | **Knob Type** | Screwdriver Slot (Low Profile) | | **Material** | Thermoplastic (High Temperature) | --- ### ### Key Electronic & Design Features 1. **Low Profile Design**: The "M" in the part number indicates a low-profile knob. This minimizes the physical protrusion from the front of the device panel, reducing the risk of accidental damage or snagging. 2. **Safety & Insulation**: The body is constructed from high-grade thermoplastic with high dielectric strength to prevent arcing and ensure user safety during fuse replacement. 3. **Terminal Versatility**: The terminals are designed to be "dual-use." They can either be soldered directly or connected using 4.8mm (3/16") quick-connect crimp terminals. 4. **Environmental Compliance**: The "-R" suffix indicates that the part is **RoHS compliant**, meaning it is free from hazardous substances like lead and cadmium. ### ### Pinout and Installation Logic The device acts as a series bridge in the "Hot" (Live) line of a circuit. * **Rear Terminal**: Typically connected to the incoming power source. * **Side Terminal**: Connected to the load (the rest of the device's circuitry). * **The Fuse**: Completes the circuit between these two terminals when inserted. --- ### ### Comparison of HTB Series Variants The HTB series has several variations based on terminal orientation and knob style: | Part Number | Knob Style | Terminal Orientation | | :--- | :--- | :--- | | **HTB-44M-R** | Screwdriver Slot | Right Angle / Quick Connect | | **HTB-24M-R** | Screwdriver Slot | Vertical / Quick Connect | | **HTB-46I-R** | Finger Grip | Right Angle / Quick Connect |