## Technical Overview: 3SBP 5-R Fuse The **3SBP 5-R** is a specific type of electronic component, categorized as a **Subminiature Pigtail Fuse**. It is part of the 3SBP series manufactured by Bel Fuse Inc. These fuses are designed for space-constrained circuit protection applications. --- ### 1. Key Technical Specifications Below are the primary electrical and physical characteristics of the 3SBP 5-R: | Parameter | Specification | | :--- | :--- | | **Current Rating** | 5 Amperes | | **Voltage Rating (AC)** | 250 Volts | | **Fuse Type** | Time-Lag (Slow Blow) | | **Mounting Type** | Through-Hole (Axial Leaded) | | **Material** | Glass Tube with Nickel Plated Brass Caps | | **Interrupting Rating** | 200A @ 250V AC | | **RoHS Status** | Compliant (indicated by the "-R" suffix) | --- ### 2. Functional Characteristics The 3SBP 5-R is defined by several critical electronic behaviors: * **Slow Blow (Time-Delay):** Unlike "Fast Acting" fuses, the 3SBP 5-R can withstand brief surges or "inrush currents" (common in motors or power supplies) without blowing immediately. It will only open the circuit if the overcurrent persists. * **Pigtail Design:** The "pigtail" refers to the axial leads soldered to the end caps. This allows the fuse to be soldered directly onto a Printed Circuit Board (PCB) rather than requiring a fuse holder or clip. * **Subminiature Form Factor:** The dimensions (typically 6.3mm x 32mm for standard, though the 3SBP series is often smaller at approx. 3.6mm x 10mm) allow for high-density electronic layouts. --- ### 3. Part Number Breakdown Understanding the nomenclature helps in identifying variants: 1. **3SBP:** The series name (3.6 x 10mm Slow Blow Pigtail). 2. **5:** The amperage rating (5 Amps). 3. **-R:** Indicates RoHS (Restriction of Hazardous Substances) compliance, meaning it is lead-free. --- ### 4. Common Applications * **Consumer Electronics:** Power supplies for monitors and televisions. * **Industrial Equipment:** Control circuits that experience momentary current spikes. * **Chargers:** Used in laptop power adapters to protect against internal component failure. ---