Based on standard electronics component databases and manufacturer naming conventions, the part number **71-2-R** is most commonly associated with **Littelfuse / Wickmann** or **Ohmite** high-reliability components. Specifically, it often refers to a **radial-leaded fuse** or a high-wattage **power resistor**. Below is a breakdown of the technical specifications and characteristics for this part. --- ## 1. Component Identification The part **71-2-R** usually falls into one of two categories depending on the manufacturer: | Category | Manufacturer | Description | | :--- | :--- | :--- | | **Resistor** | Ohmite / Stackpole | 70 Series Axial Silicone Ceramic Resistor | | **Fuse** | Littelfuse / Wickmann | TE5® Series Time-Lag Radial Lead Fuse | --- ## 2. Technical Specifications (Resistor Variant) If the part is an **Ohmite 71-2-R**, it is a wirewound resistor known for durability in high-heat environments. ### Key Features: * **Resistance Value:** Often indicated by the "2" (e.g., 2 Ohms). * **Tolerance:** The "R" usually indicates a ±5% or ±10% tolerance depending on the series standard. * **Coating:** Silicone ceramic or vitreous enamel for flame resistance. * **Power Rating:** Typically ranges from 1W to 5W depending on physical size. --- ## 3. Technical Specifications (Fuse Variant) If the part is a **71-2-R fuse**, it is designed for PCB mounting where space is limited. ### Electrical Characteristics: * **Current Rating:** 2 Amperes. * **Voltage Rating:** Typically 250VAC. * **Response Time:** Time-Lag (Slow Blow), meaning it can withstand brief surges without blowing. * **Material:** Thermoplastic body with tin-plated copper leads. --- ## 4. Common Applications These components are industrial-grade and are typically found in: 1. **Power Supplies:** Used as input protection (fuses) or current limiters (resistors). 2. **Motor Controllers:** Providing surge protection for inductive loads. 3. **Consumer Electronics:** High-density PCBs where standard glass fuses won't fit. --- ## 5. Visual Identification * **Shape:** Rectangular or cylindrical (Sub-miniature). * **Leads:** Radial (two leads coming out of the same side) for vertical mounting. * **Markings:** Look for a "T" (Time-Lag) followed by "2A" (2 Amps) for fuses.