The **5MTP 7-R** is a specific model of a **Miniature Cartridge Fuse** commonly used in electronic circuits for overcurrent protection. This part belongs to the 5MTP series manufactured by companies like **Bel Fuse Inc.** --- ## Technical Specifications The "7-R" suffix typically denotes the current rating and RoHS compliance. Below is a breakdown of its core characteristics: | Feature | Specification | | :--- | :--- | | **Type** | Glass Body Cartridge Fuse | | **Current Rating** | 7 Amperes (7A) | | **Voltage Rating** | 250V AC | | **Fuse Speed** | Medium Time-Lag (Medium Blow) | | **Dimensions** | 5mm x 20mm | | **Termination** | Axial Leaded (usually "P" denotes Pigtail/Leads) | | **Compliance** | RoHS 6 Compliant (-R) | --- ## Key Component Features ### 1. Medium Time-Lag Design Unlike "Fast-Acting" fuses, the 5MTP 7-R is designed to withstand temporary surges (inrush current) without blowing immediately. However, it will disconnect the circuit if a sustained overload or short circuit occurs. ### 2. Axial Leads (Pigtails) The "P" in the 5MTP series indicates that this is a **leaded fuse**. Instead of clipping into a fuse holder, the wire leads are soldered directly onto a Printed Circuit Board (PCB). This is ideal for: * Space-saving designs. * Applications where vibration might shake a standard fuse out of a clip. ### 3. Glass Body Construction The transparent glass body allows for easy visual inspection. If the fuse has blown due to a severe short circuit, the glass may appear blackened or the internal filament will be visibly broken. --- ## Applications The 5MTP 7-R is frequently found in: * **Power Supplies:** Protecting the input stage from current spikes. * **Consumer Electronics:** Televisions, audio equipment, and monitors. * **Industrial Controls:** Small motor circuits and control boards. --- ## Part Number Breakdown To better understand this electronic part, here is how the part number is usually constructed: * **5MTP**: Series name (5x20mm, Medium Time-Lag, Pigtail). * **7**: The amperage (7 Amps). * **-R**: Indicates the part is lead-free and meets RoHS standards.