RNF18FTD511K Equivalent & Substitute Parts

Part Overview

The RNF18FTD511K is a 511 kOhms ±1% metal film through-hole resistor rated at 0.125W (1/8W) in axial package configuration, manufactured by Stackpole Electronics Inc. This component is classified as Active product status with ROHS3 compliance. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the allowed parameter range for axial metal film resistors.

Substiute Parts

RNF18FTD511K

Stackpole Electronics IncIn Stock: 1095RNF18FTD511K Datasheet

Current PartRFQ

MFR-25FBF52-511K

YAGEOIn Stock: 10319MFR-25FBF52-511K Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the RNF18FTD511K is determined by the following criteria:

• Resistance value: 511 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Composition: Metal Film (exact match required)
• Package: Axial (exact match required)
• Temperature Coefficient: ±100ppm/°C (exact match required)
• Operating Temperature Range: -55°C to 155°C (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)

The substitute part MFR-25FBF52-511K meets all electrical specifications. The power rating difference (0.25W vs 0.125W) represents a higher capability rating, which is acceptable in substitution applications where the original 0.125W specification is not exceeded in circuit operation.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF18FTD511K and MFR-25FBF52-511K are Active product status components with identical regulatory compliance profiles (ROHS3, REACH Unaffected, EAR99 classification). Selection between these parts is based on availability and packaging requirements. The MFR-25FBF52-511K offers higher power dissipation capability while maintaining all electrical and thermal specifications of the original part. Both components satisfy the same operating temperature range and tolerance requirements for 511 kOhms ±1% metal film axial resistor applications.

Frequently Asked Questions (FAQ)

Q: Can MFR-25FBF52-511K replace RNF18FTD511K in all applications?

A: Yes, provided circuit power dissipation does not exceed the original 0.125W specification. The substitute part's 0.25W rating provides additional thermal margin.

Q: Are the physical dimensions compatible?

A: Both parts use axial package configuration. The MFR-25FBF52-511K has larger dimensions (0.094" Dia x 0.248" L vs 0.071" Dia x 0.130" L). PCB layout and mechanical clearance must be verified for the substitute part.

Q: Do both parts meet the same compliance standards?

A: Yes. Both are ROHS3 Compliant, REACH Unaffected, and classified as EAR99 for export control purposes.

Q: What is the tolerance specification for both parts?

A: Both parts are rated at ±1% tolerance for the 511 kOhms resistance value.

Q: Are the temperature coefficients identical?

A: Yes. Both parts have a temperature coefficient of ±100ppm/°C and operate across the -55°C to 155°C temperature range.