The **HTB-36I-R** is a high-performance panel-mount fuse holder manufactured by **Eaton (Bussmann Division)**. It is designed for standard $1/4" \times 1-1/4"$ (6.3mm x 32mm) fuses, commonly used in industrial and consumer electronics for circuit protection. ### Technical Specifications The following table outlines the primary electrical and physical characteristics of the HTB-36I-R: | Feature | Specification | | :--- | :--- | | **Current Rating** | 20 Amperes (UL), 16 Amperes (VDE/SEMKO) | | **Voltage Rating** | 250 Volts AC | | **Fuse Size** | $1/4" \times 1-1/4"$ (Standard US size) | | **Terminal Type** | 1/4" Quick Connect (Solderable) | | **Body Material** | High-temperature thermoplastic (UL 94V0) | | **Mounting Type** | Rear Mount (Nut secured) | | **Knob Type** | Low Profile, Screwdriver slotted | --- ### Key Electronic & Structural Components #### 1. The Body (Housing) The body is constructed from high-grade phenolic or thermoplastic material. This provides the necessary **dielectric strength** to prevent arcing between the fuse and the panel chassis. It is rated to withstand high temperatures generated during overcurrent events. #### 2. Contact Terminals The HTB-36I-R features two main terminals: * **Line Terminal:** Usually connected to the power source. * **Load Terminal:** Connected to the device being protected. The terminals are designed for "Quick Connect" spade lugs but are also compatible with direct soldering. #### 3. The Carrier (Cap/Knob) The "I" in the part number refers to the **In-line/Screwdriver-slot** design. This is a safety feature that requires a tool to open, preventing accidental contact with live components. The carrier holds the fuse securely against the internal spring-loaded contacts. #### 4. Dielectric Strength The component is rated for a dielectric strength of **1500 Volts AC** minimum, ensuring that even in high-voltage spikes, the holder will not leak current to the mounting panel. --- ### Comparison: HTB Series Variations The "36I" designation specifically identifies the mounting and terminal configuration: * **HTB-2x:** Solder/Quick Connect 3/16" terminals. * **HTB-3x:** Solder/Quick Connect 1/4" terminals. * **HTB-x6:** Rear hex-nut mounting. * **HTB-xxI:** Low profile knob, screwdriver release.