RNF12FBC4M99

Overview

The RNF12FBC4M99 is a fixed metal film resistor manufactured by Stackpole Electronics Inc. It features an axial through-hole mounting configuration with a tubular construction. The component has a resistance value of 4.99 Mohms and a tolerance of ±0.1%. It is rated for a power dissipation of 0.5W at 70°C, with a maximum working voltage of 350Vrms and an overload voltage of 750Vrms. The temperature coefficient of resistance (TCR) is ±25ppm/°C. The operating temperature range spans from -55°C to +155°C. The physical dimensions are approximately 2.75mm in diameter and 8.75mm in length.

Feature Summary

• Precision metal film construction ensuring superior electrical stability and low temperature coefficient performance.
• Standard flame-retardant coating provides safety compliance and fire resistance.
• RoHS compliant and lead-free manufacturing without exemption, meeting environmental standards.

Applications

• High-precision analog signal conditioning circuits
• Medical instrumentation requiring stable reference voltages
• Test and measurement equipment calibration networks

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm tolerance and packaging details. Ensure the procurement channel sources directly from authorized distributors to guarantee authenticity. Check for any recent product change notices that might affect pinout or material composition. Confirm RoHS3 compliance status if required by your regional regulations before finalizing the purchase order.

Selection Notes

Select this component when circuit design demands high resistance values with tight tolerance stability in an axial package. The 0.5W power rating supports moderate current applications within the specified voltage limits. Consider the ±25ppm/°C TCR for environments with significant thermal fluctuations. Verify that the axial lead spacing fits the target PCB footprint and that the 350V working voltage exceeds the peak circuit voltage.

Part Context

This part belongs to the RNF series of general-purpose metal film resistors from Stackpole Electronics. The series offers various tolerance options and power ratings in axial packages. The RNF designation typically indicates standard precision metal film technology with flame-retardant coatings. This series serves as a reliable alternative to older MP series components in modern electronic designs.

Replacement Considerations

Cross-reference with other manufacturers' axial metal film resistors offering 4.99Mohm ±0.1% tolerance and 0.5W rating. Verify equivalent TCR specifications and physical dimensions for board compatibility. Ensure substitute parts meet the same RoHS and flame-retardant requirements.