The **3SBP 100-R** is a specific electronic component belonging to the **Bel Fuse 3SBP Series**. It is a high-performance miniature cartridge fuse designed for circuit protection in various electronic applications. --- ## Technical Specifications The following table outlines the primary electrical and physical characteristics of the 3SBP 100-R: | Parameter | Specification | | :--- | :--- | | **Part Number** | 3SBP 100-R | | **Current Rating** | 100mA (0.1A) | | **Voltage Rating (AC)** | 250V | | **Fuse Type** | Slow Blow / Time Delay | | **Size / Dimension** | 6.3mm x 32mm (1/4" x 1-1/4") | | **Termination Style** | Pigtail Leads (Axial) | | **Material** | Glass Body, Brass Caps (Nickel Plated) | | **RoHS Status** | Compliant (indicated by the "-R" suffix) | --- ### Key Features and Functionality 1. **Time-Delay (Slow Blow):** Unlike fast-acting fuses, the "Slow Blow" characteristic allows the fuse to withstand temporary surge currents (like motor startups or charging capacitors) without blowing immediately. It will only open the circuit if the overload persists. 2. **Pigtail Leads:** The "P" in 3SBP indicates that it comes with axial leads. This allows the fuse to be soldered directly onto a Printed Circuit Board (PCB) rather than being inserted into a fuse clip or holder. 3. **Low Current Sensitivity:** With a rating of **100mA**, this fuse is designed to protect delicate low-power electronics where even a small sustained increase in current could cause damage. --- ### Common Applications * **Power Supplies:** Protecting the primary side of small transformers. * **Industrial Controls:** Safeguarding PLC outputs or sensor loops. * **Consumer Electronics:** Used in high-end audio equipment or appliances where initial inrush current is present. * **Chargers:** Protection for battery charging circuits. --- ### Comparison: Standard vs. Pigtail If you are replacing this part, ensure you understand the difference between the standard 3AG size and the Pigtail version: | Feature | 3SB (Standard) | 3SBP (This Model) | | :--- | :--- | :--- | | **Mounting** | Fuse Clip / Holder | Solder-in (PCB) | | **Maintenance** | Easily replaceable | Requires desoldering | | **Vibration** | May loosen over time | High vibration resistance |