RNF14FTC2K94 Equivalent & Substitute Parts

Part Overview

The RNF14FTC2K94 is a 2.94 kOhms ±1% 0.25W axial through-hole resistor manufactured by Stackpole Electronics Inc. This metal film resistor features flame retardant coating and safety construction, designed for applications requiring precision resistance values with tight tolerance specifications. The part is currently active in production with 912 units in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility allow direct replacement in circuit designs.

Substiute Parts

RNF14FTC2K94

Stackpole Electronics IncIn Stock: 979RNF14FTC2K94 Datasheet

Current PartRFQ

CMF552K9400FHEB

Vishay DaleIn Stock: 1577CMF552K9400FHEB Datasheet

UpgradeRFQ

CMF502K9400FHEB

Vishay DaleIn Stock: 6349CMF502K9400FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FTC2K94 are qualified based on the following criteria:

Electrical Equivalence: Resistance value (2.94 kOhms) and tolerance (±1%) must be identical. Temperature coefficient (±50ppm/°C) must match or be superior.

Mechanical Compatibility: Package type must be axial through-hole configuration to ensure PCB footprint compatibility.

Power Rating Consideration: Substitute parts may have equal or higher power ratings (0.25W or greater). Higher power ratings provide design margin and do not affect circuit functionality when the original power requirement is 0.25W.

Environmental & Compliance: All substitutes must maintain ROHS3 compliance and operate within the specified temperature range or an extended range.

Composition: Metal film construction ensures consistency in performance characteristics.

Two substitute parts meet these criteria: CMF552K9400FHEB (0.5W upgrade option) and CMF502K9400FHEB (direct 0.25W equivalent with enhanced features).

Parameter Comparison

Engineering Selection Recommendations

CMF502K9400FHEB (Manufacturer Recommended): This part provides direct electrical and mechanical equivalence to the RNF14FTC2K94 with identical 0.25W power rating and axial package. The Vishay Dale CMF50 series offers enhanced moisture resistance and extended operating temperature range (-55°C ~ 175°C versus -55°C ~ 155°C). Both parts maintain ROHS3 compliance and ±50ppm/°C temperature coefficient. This substitute is suitable for direct replacement in existing designs without PCB modification. Inventory availability is significantly higher (6269 units).

CMF552K9400FHEB (Upgrade Option): This part provides the same electrical specifications with doubled power rating (0.5W versus 0.25W). The CMF55 series is appropriate when design margins require higher power dissipation capability or when thermal stress reduction is a design objective. Extended operating temperature range and moisture resistance are additional benefits. Physical dimensions are slightly smaller (0.090" Dia x 0.240" L versus 0.093" Dia x 0.250" L), maintaining axial package compatibility. This upgrade does not compromise circuit functionality and provides enhanced reliability margin.

Frequently Asked Questions (FAQ)

Q: Can CMF502K9400FHEB replace RNF14FTC2K94 without circuit modification?

A: Yes. Both parts have identical resistance (2.94 kOhms), tolerance (±1%), power rating (0.25W), and axial package configuration. Electrical and mechanical compatibility is direct. The CMF502K9400FHEB offers enhanced moisture resistance and extended temperature range as additional benefits.

Q: What is the advantage of using CMF552K9400FHEB over CMF502K9400FHEB?

A: CMF552K9400FHEB provides doubled power rating (0.5W versus 0.25W) while maintaining identical resistance and tolerance specifications. This upgrade reduces thermal stress on the component and provides design margin for applications with variable load conditions. Physical dimensions are slightly smaller, and both parts maintain full axial package compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. RNF14FTC2K94, CMF552K9400FHEB, and CMF502K9400FHEB are all ROHS3 compliant. No environmental or regulatory restrictions apply to substitution.

Q: Do substitute parts have different temperature coefficients?

A: No. All three parts maintain ±50ppm/°C temperature coefficient. Substitute parts offer extended operating temperature ranges (-55°C ~ 175°C versus -55°C ~ 155°C), providing additional thermal margin without changing temperature stability characteristics.

Q: Are physical dimensions identical between main and substitute parts?

A: Dimensions are similar but not identical. RNF14FTC2K94 is 0.093" Dia x 0.250" L. CMF502K9400FHEB is 0.065" Dia x 0.150" L (smaller). CMF552K9400FHEB is 0.090" Dia x 0.240" L (slightly smaller). All maintain axial package configuration and standard through-hole PCB footprint compatibility. Verify PCB layout constraints if space is critical.