RNF18FTD73K2 Equivalent & Substitute Parts

Part Overview

The RNF18FTD73K2 is a 73.2 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 currently active in production with 3734 units in stock. Substitute parts may be required due to inventory constraints, application-specific packaging needs, or power rating requirements in circuit designs where higher dissipation capability is beneficial.

Substiute Parts

RNF18FTD73K2

Stackpole Electronics IncIn Stock: 3795RNF18FTD73K2 Datasheet

Current PartRFQ

MFR-25FBF52-73K2

YAGEOIn Stock: 11967MFR-25FBF52-73K2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF18FTD73K2 is determined by the following critical parameters:

• Resistance Value: Must be 73.2 kOhms
• Tolerance: Must be ±1%
• Composition: Must be Metal Film
• Temperature Coefficient: Must be ±100ppm/°C
• Operating Temperature Range: Must be -55°C ~ 155°C
• Package Type: Must be Axial
• Compliance: Must maintain ROHS3 compliance

The substitute part MFR-25FBF52-73K2 meets all critical electrical parameters. The primary difference is the power rating (0.25W vs. 0.125W), which represents an upgrade in thermal capability while maintaining identical electrical characteristics and mechanical compatibility in axial package form.

Parameter Comparison

Engineering Selection Recommendations

The MFR-25FBF52-73K2 is a valid substitute for the RNF18FTD73K2 based on electrical equivalence and regulatory compliance. Both components are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. The substitute maintains identical resistance, tolerance, temperature coefficient, and operating temperature specifications.

Selection between these parts should account for physical space constraints, as the MFR-25FBF52-73K2 has larger physical dimensions (0.094" diameter vs. 0.071" diameter, and 0.248" length vs. 0.130" length). The higher power rating of the substitute (0.25W vs. 0.125W) provides additional thermal margin in applications where power dissipation approaches the original specification limit.

Frequently Asked Questions (FAQ)

Q: Can MFR-25FBF52-73K2 be used as a direct replacement for RNF18FTD73K2?

A: Yes, from an electrical standpoint. Both components have identical resistance (73.2 kOhms), tolerance (±1%), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C ~ 155°C). Physical space availability must be verified, as the substitute is larger in diameter and length.

Q: What is the primary difference between these two parts?

A: The power rating differs: RNF18FTD73K2 is rated at 0.125W (1/8W), while MFR-25FBF52-73K2 is rated at 0.25W (1/4W). This means the substitute can dissipate twice the power while maintaining the same electrical characteristics.

Q: Are both parts RoHS compliant?

A: Yes, both the RNF18FTD73K2 and MFR-25FBF52-73K2 are ROHS3 compliant and REACH unaffected.

Q: Will the larger size of MFR-25FBF52-73K2 affect circuit board layout?

A: The substitute has larger physical dimensions. PCB layout compatibility must be confirmed before substitution. The diameter increases from 1.80mm to 2.40mm, and the length increases from 3.30mm to 6.30mm.

Q: Are the temperature coefficients identical?

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