The **S506-50-R** is a specific model of electronic fuse manufactured by **Eaton (Bussmann Series)**. It belongs to the S506 family of time-delay, glass tube fuses. --- ## 1. Technical Specifications The following table summarizes the key electrical and physical characteristics of the S506-50-R: | Parameter | Specification | | :--- | :--- | | **Current Rating** | 50mA (0.05 Amperes) | | **Voltage Rating (AC)** | 250 VAC | | **Fuse Type** | Time-Delay (Slow-Blow) | | **Body Material** | Glass Tube | | **End Cap Material** | Nickel-plated Brass | | **Interrupt Rating** | 35A at 250VAC | | **Dimensions** | 5mm x 20mm | | **Resistance (Typical)** | 9.2 Ohms | | **Standard Compliance** | IEC 60127-2 (Sheet 3) | --- ## 2. Key Features and Meaning of the Part Number The part number can be broken down to understand the component's identity: * **S506**: The series name (Time-delay, 5x20mm glass fuse). * **50**: The current rating in milliamps (50mA). * **-R**: Indicates **RoHS Compliance** (lead-free and environmentally friendly). ### Time-Delay Functionality As a **Slow-Blow** fuse, the S506-50-R is designed to withstand temporary surges in current (such as inrush currents when a device is first turned on) without blowing. It will only open the circuit if the overcurrent condition persists for a specific duration. --- ## 3. Common Applications Due to its low amperage and time-delay characteristics, this fuse is typically found in: 1. **Consumer Electronics**: Power supplies for small devices. 2. **Instrumentation**: Protection for sensitive measuring equipment. 3. **Industrial Controls**: Low-power control circuits where inductive loads might cause brief current spikes. 4. **Audio/Visual Equipment**: Protecting internal circuitry from power surges. --- ## 4. Usage Precautions * **Voltage Safety**: Never use a fuse in a circuit with a voltage higher than its rated 250VAC. * **Substitution**: Do not replace a "Slow-Blow" (Time-delay) fuse with a "Fast-Acting" fuse of the same amperage, as the fast-acting version will likely blow immediately upon device startup. * **Orientation**: Fuses are non-polarized components; they can be installed in either direction within a fuse holder or clip.