Advanced Electronics Vishay Dale RN65D2500B 250 Ohm High Precision Metal Film Resistor Instruction Manual

1. Introduction

This manual provides essential information for the proper handling, installation, and understanding of the Advanced Electronics Vishay Dale RN65D2500B High Precision Metal Film Resistors. These components are designed for applications requiring high stability and precision.

2. Product Features

• Resistance: 250 Ohms
• Tolerance: ±0.1%
• Power Rating: 0.5W (1/2W)
• Composition: Metal Film
• Temperature Coefficient: ±100ppm/°C
• Operating Temperature Range: -65°C to 175°C
• Termination: Axial leads
• Features: Flame Retardant Coating, Military Grade (MIL-R-10509/2 Series), Moisture Resistant, Safety Enhanced
• Dimensions: 0.180" Dia x 0.562" L (4.57mm x 14.27mm)
• Maximum Working Voltage: 350V
• Package: Typically supplied in packs of 5 resistors.

This image displays a package of five Vishay Dale RN65D2500B 250 Ohm metal film resistors. Each resistor features a brown cylindrical body with silver axial leads, bundled together for distribution.

3. Setup and Installation

These resistors are passive electronic components designed for integration into various circuit boards and electronic assemblies. Proper handling and installation are crucial for optimal performance and longevity.

3.1 Handling Precautions

• Handle resistors by their body to avoid bending or damaging the leads.
• Avoid excessive mechanical stress on the leads, especially near the resistor body.
• Store in a dry, temperature-controlled environment to prevent moisture absorption or extreme temperature exposure.

3.2 Installation Guidelines

• Lead Bending: When bending leads for insertion, ensure the bend radius is not too sharp and is at least 0.05 inches (1.27 mm) from the resistor body.
• Soldering: Use appropriate soldering techniques to prevent overheating the resistor body. Recommended soldering temperature and duration should adhere to industry standards for metal film resistors (e.g., maximum 260°C for 5 seconds).
• Placement: Ensure adequate spacing from heat-generating components if the circuit operates at higher temperatures, although these resistors have a wide operating range.

4. Operating Principles

The Vishay Dale RN65D2500B resistor functions by opposing the flow of electric current in a circuit, converting electrical energy into heat. Its 250 Ohm resistance value, coupled with a ±0.1% tolerance, ensures precise current and voltage control in sensitive electronic applications. The metal film construction provides excellent stability and low noise characteristics, making it suitable for precision instrumentation, military, and industrial control systems.

5. Maintenance

Resistors are generally maintenance-free components. However, proper storage and handling contribute to their long-term reliability.

• Storage: Keep unused resistors in their original packaging or in a clean, dry, and static-safe environment. Avoid exposure to direct sunlight, high humidity, or corrosive atmospheres.
• Cleaning: If cleaning is necessary, use isopropyl alcohol and a soft brush. Ensure the component is completely dry before use.
• Inspection: Periodically inspect installed resistors for any signs of physical damage, discoloration, or compromised solder joints, especially in high-stress environments.

6. Troubleshooting

As passive components, resistors typically do not 'fail' in the same way active components do, but issues can arise from improper installation or extreme operating conditions.

• Incorrect Resistance Reading: Verify the resistor value with a multimeter. If significantly off, check for physical damage or incorrect component selection.
• Overheating/Discoloration: This indicates the resistor is dissipating more power than its rated capacity. Review circuit design to ensure the power rating (0.5W) is not exceeded.
• Open Circuit: A resistor showing infinite resistance may have a broken lead or internal damage, often due to excessive mechanical stress or thermal shock during soldering.
• Poor Solder Joint: Ensure all connections are properly soldered, free from cold joints or bridges.

7. Specifications

8. Warranty and Support

Specific warranty information for these components is not provided in the product details. For any warranty claims, technical support, or inquiries regarding the Advanced Electronics Vishay Dale RN65D2500B resistors, please contact the original seller or Advanced Electronics directly through their official support channels. Retain your purchase receipt for any potential claims.