The **LPN-RK-15/100SP** is a high-performance, current-limiting, time-delay fuse part of the **Bussmann Low-Peak™** series. It is designed for power distribution and motor protection in electrical circuits. --- ### 1. Technical Specifications The following table outlines the primary electrical characteristics of this component: | Feature | Specification | | :--- | :--- | | **Series** | Low-Peak (LPN-RK) | | **Current Rating** | 15 Amps | | **Voltage Rating** | 250 VAC / 125 VDC | | **Interrupting Rating** | 300 kA (AC) / 100 kA (DC) | | **Fuse Class** | Class RK1 | | **Response Time** | Time-Delay (Dual-Element) | | **Body Material** | Fiberglass Tube | --- ### 2. Key Electronic Features * **Dual-Element Design:** Unlike fast-acting fuses, this part contains two distinct elements. One handles short circuits (instantaneous), while the other handles temporary overloads (time-delay). * **Current-Limiting Capability:** It is a Class RK1 fuse, meaning it significantly limits the peak let-through current during a fault, protecting sensitive downstream components (like VFDs or controllers) from thermal and magnetic stress. * **High Interrupting Rating:** With a 300,000 Amp interrupting rating, it can safely clear very high fault currents without exploding or maintaining an arc. * **Rejection Feature:** The "RK" designation implies it has a rejection notch that prevents it from being replaced by a lower-rated Class H or K fuse in a dedicated fuse holder. --- ### 3. Application Use Cases 1. **Motor Protection:** The time-delay feature allows the fuse to withstand high "in-rush" currents when a motor starts up, preventing nuisance blowing. 2. **Service Entrance Equipment:** Used as a primary safety mechanism for incoming power to industrial panels. 3. **Branch Circuit Protection:** Protects individual lines in a facility where high fault currents are a possibility. 4. **Inductive Loads:** Ideal for transformers and solenoids that experience momentary current spikes. --- ### 4. Part Number Breakdown * **LPN:** Low-Peak, 250V (Standard series). * **RK:** Class RK1 (Rejection capability). * **15:** 15 Amp current rating. * **SP:** Silver-plated pins/terminals (Superior conductivity and corrosion resistance).