The **JLLS035P** is a high-performance industrial fuse part of the **POWR-GARD® JLLS Series** manufactured by Littelfuse. It is specifically designed to provide high-speed, current-limiting protection for sensitive electrical components. ### 1. Technical Specifications The following table summarizes the key electrical and physical characteristics of the JLLS035P: | Feature | Specification | | :--- | :--- | | **Part Number** | JLLS035P | | **Fuse Class** | Class T | | **Current Rating** | 35 Amperes | | **Voltage Rating (AC)** | 600 VAC | | **Voltage Rating (DC)** | 300 VDC | | **Interrupting Rating** | 200 kA (AC) / 20 kA (DC) | | **Mounting Type** | Holder / Cartridge (Bolt-down) | | **Body Material** | Melamine / Glass | --- ### 2. Key Features and Applications #### Core Characteristics * **Space-Saving Design:** Class T fuses like the JLLS035P are significantly smaller than Class R or Class J fuses, making them ideal for compact control panels and motor control centers. * **Current Limiting:** It is a "Fast-Acting" fuse. It reacts extremely quickly to overcurrent events, limiting the peak let-through current to prevent damage to downstream components. * **High Interrupting Capacity:** With a 200,000-ampere interrupting rating, it can safely clear very high fault currents without rupturing. #### Common Applications 1. **Variable Speed Drives (VFDs):** Protecting the power electronics (IGBTs/Diodes) within the drive. 2. **UPS Systems:** Ensuring protection for uninterruptible power supply circuitry. 3. **Soft Starters:** Guarding solid-state motor controllers. 4. **Main Switches:** Used in service entrance equipment where space is at a premium. --- ### 3. Comparison with Class J Fuses While both are current-limiting, the Class T (JLLS) has distinct differences: | Feature | Class T (JLLS) | Class J (JLS/JTD) | | :--- | :--- | :--- | | **Size** | Smallest footprint | Medium footprint | | **Speed** | Extremely Fast-Acting | Fast or Time-Delay | | **Voltage** | Up to 600V | Up to 600V | ---