RNF18FBD121R

Overview

The RNF18FBD121R is a fixed through-hole resistor manufactured by Stackpole Electronics Inc. It features a resistance value of 121 Ohms with a tolerance of ±1%. The component is rated for 0.125W (1/8W) power dissipation and utilizes metal film composition. It has an axial package with dimensions of 0.071" diameter x 0.130" length (1.80mm x 3.30mm). The operating temperature range is -55°C to 155°C, and it carries a temperature coefficient of ±100ppm/°C.

Feature Summary

• Metal film construction for stable electrical performance
• Flame retardant coating for enhanced safety
• Axial leaded package for through-hole mounting

Applications

• General purpose electronic circuits
• Signal conditioning networks
• Current sensing applications

Procurement Notes

Verify the specific suffix 'B' against the manufacturer datasheet to confirm if it denotes a special variant or standard packaging, as standard RNF18FTD parts are common. Confirm RoHS compliance status for the specific batch. Ensure the axial leads match the PCB footprint requirements. Check for any specific storage conditions required for metal film components.

Selection Notes

Select this component when a precise 121 Ohm resistance is required in low-power through-hole designs. The metal film technology offers better stability than carbon composition. Consider the 1/8W power rating to ensure adequate thermal margin. Verify that the axial form factor fits the assembly constraints compared to surface mount alternatives.

Part Context

This part belongs to the RNF series of metal film resistors from Stackpole Electronics. The series is known for flame retardant coatings and safety approvals. It serves as a general-purpose precision resistor for consumer and industrial electronics where tight tolerances are needed.

Replacement Considerations

Direct substitutes include other 121 Ohm ±1% 1/8W axial metal film resistors from manufacturers like Yageo or Vishay. Ensure the replacement matches the ±100ppm/°C temperature coefficient and physical dimensions for proper fit.