## Electronic Component Overview: 3SBP750-R The **3SBP750-R** is a specific type of electronic protection component, primarily categorized as a **slow-blow (time-delay) cartridge fuse**. It is manufactured by **Bel Fuse Inc.** and belongs to the 3SBP series. --- ### 1. Technical Specifications Below are the primary technical characteristics of the 3SBP750-R: | Parameter | Specification | | :--- | :--- | | **Current Rating** | 750 mA (0.75A) | | **Voltage Rating (AC)** | 250 V | | **Fuse Type** | Glass Body / Cartridge | | **Response Characteristic** | Slow-Blow (Time-Delay) | | **Size / Dimension** | 6.3mm x 32mm (1/4" x 1-1/4") | | **Termination Style** | Pigtail Lead (Axial Through-hole) | | **Breaking Capacity** | 200A @ 250V AC | | **RoHS Status** | RoHS 2 Compliant (-R suffix) | --- ### 2. Key Features and Construction The 3SBP750-R is designed with specific physical and electrical attributes to suit industrial and consumer electronics: * **Pigtail Leads:** The "P" in the series name often denotes pigtail leads. These are wire leads attached to the end caps, allowing the fuse to be soldered directly onto a Printed Circuit Board (PCB) without a fuse holder. * **Slow-Blow Mechanism:** Unlike fast-acting fuses, this component is designed to withstand temporary "inrush" currents (brief surges that occur when a device is first turned on) without blowing. It will only open the circuit if the overcurrent persists. * **Glass Body:** The transparent glass body allows for easy visual inspection to see if the internal filament has melted. --- ### 3. Applications This fuse is commonly used in power supplies and consumer electronics where initial startup currents are higher than the steady-state operating current. * **Power Supplies:** Protecting against sustained overcurrent while ignoring transformer inrush. * **Monitors/Displays:** Used in internal circuitry for CRT or older LCD power boards. * **Industrial Control:** Protecting sensitive low-current circuits (under 1 Amp). --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying variants: | Segment | Meaning | | :--- | :--- | | **3SB** | Series designation (3SB = 1/4" x 1-1/4" Time-Delay) | | **P** | Pigtail / Axial Lead style | | **750** | Current rating in milliamps (750mA) | | **-R** | RoHS Compliant (Lead-free) | ---