RNF14FTC28K0 Equivalent & Substitute Parts

Part Overview

The RNF14FTC28K0 is a 28 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 construction, designed for applications requiring precision resistance values with reliable performance across industrial temperature ranges. The part is currently active in production with 983 units in stock. Substitute parts are identified to provide alternative sourcing options when the primary part becomes unavailable or when design requirements permit upgraded specifications.

Substiute Parts

RNF14FTC28K0

Stackpole Electronics IncIn Stock: 1032RNF14FTC28K0 Datasheet

Current PartRFQ

CMF5528K000FHEB

Vishay DaleIn Stock: 5823CMF5528K000FHEB Datasheet

UpgradeRFQ

CMF5028K000FHEB

Vishay DaleIn Stock: 2633CMF5028K000FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FTC28K0 are qualified based on the following electrical and mechanical parameters:

Core Compatibility Criteria:

• Resistance value: 28 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Composition: Metal Film (exact match required)
• Package: Axial through-hole (exact match required)
• Temperature Coefficient: ±50ppm/°C (exact match required)

Allowable Variations:

• Power rating: May be equal or higher than 0.25W
• Operating temperature range: May be equal or extended
• Physical dimensions: May vary within axial package constraints
• Manufacturer: Different qualified manufacturers permitted
• Packaging format: Cut Tape (CT) acceptable as alternative to Tape & Reel (TR)

Substitute Classification:

1. CMF5028K000FHEB (Manufacturer Recommended): Exact electrical match with identical 0.25W power rating. Manufactured by Vishay Dale with extended operating temperature range (-55°C ~ 175°C). Smaller physical dimensions. Cut Tape packaging.

2. CMF5528K000FHEB (Upgrade Option): Electrical match with upgraded 0.5W power rating. Manufactured by Vishay Dale with extended operating temperature range (-55°C ~ 175°C). Slightly smaller physical dimensions. Cut Tape packaging.

Parameter Comparison

Engineering Selection Recommendations

CMF5028K000FHEB Selection Criteria: This part is the manufacturer-recommended substitute. It provides identical electrical specifications (28 kOhms, ±1%, 0.25W, ±50ppm/°C) with extended operating temperature range to 175°C. Physical dimensions are smaller, which may require PCB layout verification. All regulatory compliance certifications (ROHS3, REACH Unaffected) are maintained. This substitute is appropriate for direct replacement in applications where the original RNF14FTC28K0 is unavailable.

CMF5528K000FHEB Selection Criteria: This part provides upgraded power handling at 0.5W while maintaining all other electrical specifications. Extended operating temperature range to 175°C is provided. Selection of this upgrade option is appropriate when circuit design permits higher power dissipation capability or when thermal margin improvement is desired. Physical dimensions are comparable to the main part. All regulatory compliance certifications are maintained.

Packaging Consideration: Both substitute parts are supplied in Cut Tape (CT) format rather than Tape & Reel (TR). This affects procurement and assembly processes but does not impact electrical or mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can CMF5028K000FHEB be used as a direct replacement for RNF14FTC28K0? A: Yes. Both parts have identical resistance (28 kOhms), tolerance (±1%), power rating (0.25W), and temperature coefficient (±50ppm/°C). The CMF5028K000FHEB has an extended operating temperature range (-55°C ~ 175°C versus -55°C ~ 155°C) and smaller physical dimensions. PCB layout verification is required due to dimensional differences.

Q: What is the difference between the two substitute parts? A: CMF5028K000FHEB maintains the 0.25W power rating of the original part. CMF5528K000FHEB provides upgraded 0.5W power rating. Both have identical resistance, tolerance, and temperature coefficient. Selection depends on whether the circuit design can accommodate the higher power rating.

Q: Are the substitute parts RoHS and REACH compliant? A: Yes. Both CMF5028K000FHEB and CMF5528K000FHEB are ROHS3 Compliant and REACH Unaffected, matching the compliance status of the RNF14FTC28K0.

Q: Do the physical dimension differences affect circuit compatibility? A: Physical dimensions differ between parts. The CMF5028K000FHEB is smaller (0.065" Dia x 0.150" L) compared to the RNF14FTC28K0 (0.093" Dia x 0.250" L). The CMF5528K000FHEB is comparable in length (0.240" L) but slightly smaller in diameter (0.090" Dia). PCB layout an