RNF14FTC17K8 Equivalent & Substitute Parts

Part Overview

The RNF14FTC17K8 is a 17.8 kOhms ±1% metal film axial through-hole resistor rated at 0.25W (1/4W) manufactured by Stackpole Electronics Inc. This component features flame retardant coating and safety-grade construction, designed for applications requiring precision resistance values with tight tolerance specifications. The part is currently in active production status with 736 units available in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained within the allowed parameter ranges for this resistor category.

Substiute Parts

RNF14FTC17K8

Stackpole Electronics IncIn Stock: 775RNF14FTC17K8 Datasheet

Current PartRFQ

CMF5517K800FHEB

Vishay DaleIn Stock: 1634CMF5517K800FHEB Datasheet

UpgradeRFQ

CMF5017K800FHEB

Vishay DaleIn Stock: 3862CMF5017K800FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FTC17K8 are qualified based on the following criteria:

Electrical Parameters (Must Match):

• Resistance value: 17.8 kOhms
• Tolerance: ±1%
• Composition: Metal Film
• Temperature Coefficient: ±50ppm/°C

Mechanical Parameters (Must Be Compatible):

• Package type: Axial through-hole
• Number of terminations: 2

Compliance Parameters (Must Maintain or Exceed):

• RoHS3 Compliant status
• REACH Unaffected status
• Active product status

Allowable Variations:

• Power rating may be equal or higher (0.25W or greater)
• Operating temperature range may be equal or extended
• Packaging format may differ (Tape & Reel or Cut Tape)
• Physical dimensions may vary within axial package constraints
• Additional features (moisture resistance) are acceptable enhancements

Parameter Comparison

Engineering Selection Recommendations

CMF5017K800FHEB (MFR Recommended Substitute): This part is the primary substitute for the RNF14FTC17K8. It maintains identical electrical specifications (17.8 kOhms ±1%, 0.25W, ±50ppm/°C) and mechanical compatibility (axial through-hole, 2 terminations). The CMF5017K800FHEB offers extended operating temperature range (-55°C ~ 175°C versus -55°C ~ 155°C) and includes moisture-resistant features. Both parts are ROHS3 compliant and active products. The primary design consideration is the reduced physical size (0.065" Dia x 0.150" L versus 0.093" Dia x 0.250" L), which may affect PCB layout and mechanical clearance in space-constrained applications. Inventory availability is significantly higher (3777 units).

CMF5517K800FHEB (Upgrade Substitute): This part provides electrical equivalence with an upgraded power rating of 0.5W (1/2W) compared to the original 0.25W specification. The CMF5517K800FHEB maintains all other electrical parameters and is ROHS3 compliant with active product status. The higher power rating provides thermal margin in applications where the original 0.25W rating approaches maximum dissipation limits. Physical dimensions are comparable to the main part (0.090" Dia x 0.240" L). This substitute is suitable for direct replacement when thermal performance enhancement is beneficial. Inventory availability is 1618 units.

Frequently Asked Questions (FAQ)

Q: Can CMF5017K800FHEB be used as a direct replacement for RNF14FTC17K8? A: Yes. Both parts share identical electrical specifications (17.8 kOhms ±1%, 0.25W, ±50ppm/°C metal film composition) and axial through-hole package type. The primary consideration is physical size difference: CMF5017K800FHEB is smaller (0.065" Dia x 0.150" L versus 0.093" Dia x 0.250" L). Verify PCB layout and mechanical clearance before substitution.

Q: What is the difference between the two substitute parts? A: CMF5017K800FHEB matches the original power rating (0.25W) with smaller physical dimensions. CMF5517K800FHEB provides higher power rating (0.5W) with dimensions closer to the original part. Both maintain identical resistance, tolerance, and temperature coefficient specifications.

Q: Are there temperature range differences? A: Yes. The RNF14FTC17K8 operates from -55°C to 155°C. Both substitute parts (CMF5017K800FHEB and CMF5517K800FHEB) extend the upper limit to 175°C. This extended range does not affect substitution compatibility; it represents an enhancement.

Q: Do the substitute parts have different moisture resistance properties? A: Both substitute parts include moisture-resistant features, whereas the original RNF14FTC17K8 specifies only flame retardant coating. This enhancement does not affect electrical or mechanical compatibility.

Q: What packaging format differences exist? A: The RNF14FTC17K8 is supplied in Tape & Reel (TR) format. Both substitute parts are supplied in Cut Tape (CT) format. This affects procurement and assembly processes but does not impact component performance or compatibility.

Q: Are all parts RoHS3 compliant? A: Yes. The RNF14FTC17K8, CMF5017K800FHEB, and CMF5517K800FHEB are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.