The **HTB-34M-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)**. Below is a detailed breakdown of its electronic specifications and characteristics. --- ### 1. Key Technical Specifications The "R" suffix in the part number usually indicates **RoHS compliance** (Restriction of Hazardous Substances). | Feature | Specification | | :--- | :--- | | **Component Type** | Fuse Holder | | **Fuse Size Accepted** | 5mm x 20mm | | **Current Rating** | 20 Amps (UL), 16 Amps (VDE) | | **Voltage Rating** | 250 Volts AC | | **Mounting Type** | Panel Mount (Nut retained) | | **Termination Style** | 3/16" Quick Connect Terminals | | **Knob Type** | Screwdriver Slot (Low Profile) | | **Body Material** | High-temperature Thermoplastic | --- ### 2. Physical & Mechanical Design The HTB-34M-R is designed for durability and ease of integration into industrial and consumer power electronics. * **Knob Style:** The "M" in the part number signifies a **Screwdriver Release** mechanism. This is a safety feature that prevents accidental removal of the fuse by hand. * **Terminals:** It uses right-angle or straight quick-connect terminals (depending on specific sub-variations), allowing for fast wiring without soldering if desired. * **Insulation:** The body is constructed from UL 94V0 rated flame-retardant plastic to withstand internal heating. --- ### 3. Electronic Protection Role The HTB-34M-R serves three primary electronic functions: 1. **Circuit Interruption Point:** It holds the sacrificial fuse that protects the rest of the PCB/device from overcurrent. 2. **User Protection:** It provides a finger-safe environment, ensuring the operator does not touch live electrical contacts when changing a fuse. 3. **Mechanical Stability:** It ensures the fuse maintains low-resistance contact even under vibration, preventing arcing or heat buildup. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying equivalent parts: * **HTB:** Series Name (High-profile/Low-profile Panel Mount). * **-3:** Rear terminal orientation/style. * **4:** Front-panel style (Screwdriver slot). * **M:** 5mm x 20mm fuse carrier. * **-R:** RoHS compliant. ---