RNF12BBE499R

Overview

The RNF12BBE499R is a through-hole axial metal film resistor manufactured by Stackpole Electronics Inc. It features a resistance value of 499 Ohms with a tight tolerance of ±0.1%. The component is rated for 0.5W (1/2W) power dissipation and operates within a temperature range of -55°C to +155°C. It has a temperature coefficient of ±25ppm/°C and includes flame retardant coating for safety compliance.

Feature Summary

• High precision ±0.1% tolerance for accurate circuit performance
• Metal film composition ensures stability and low noise
• Flame retardant coating provides enhanced safety protection
• Wide operating temperature range supports harsh environments

Applications

• Precision analog signal conditioning circuits
• High-accuracy measurement instrumentation
• Medical device electronics requiring stable resistance
• Industrial control systems with strict tolerance needs

Procurement Notes

Verify the specific suffix BE indicates the 0.1% tolerance variant, as standard RNF series parts often carry J or F designations for 5% or 1%. Confirm RoHS3 compliance status directly with the manufacturer datasheet. Ensure axial lead dimensions match the PCB footprint requirements before finalizing procurement orders.

Selection Notes

Select this component when high stability and minimal drift are critical. The 0.1% tolerance distinguishes it from standard general-purpose resistors. Consider the axial package constraints versus surface mount alternatives if space is limited. Verify power derating curves for high-temperature operation above 70°C.

Part Context

This part belongs to the RNF series of axial metal film resistors. It shares the physical form factor with other RNF variants but differs in electrical precision. The manufacturer uses consistent naming conventions where the middle letters indicate tolerance and construction details.

Replacement Considerations

Direct substitutes include RNMF12BBE499R from the same manufacturer family. Other brands offering 0805 equivalent SMD parts require reflow soldering changes. Axial replacements must maintain the 0.1% tolerance and 0.5W rating to ensure circuit equivalence.