RNF14FTC29K4 Equivalent & Substitute Parts

Part Overview

The RNF14FTC29K4 is a 29.4 kOhms ±1% 0.25W axial through-hole resistor manufactured by Stackpole Electronics Inc. This metal film resistor features flame retardant coating and safety characteristics, designed for applications requiring precision resistance values in compact form factors. The part is active in production with 667 units currently in stock. Substitute parts are necessary to address inventory availability, extended lead times, or specific application requirements such as increased power dissipation or enhanced environmental performance.

Substiute Parts

RNF14FTC29K4

Stackpole Electronics IncIn Stock: 706RNF14FTC29K4 Datasheet

Current PartRFQ

CMF5529K400FHEB

Vishay DaleIn Stock: 2807CMF5529K400FHEB Datasheet

UpgradeRFQ

CMF5029K400FHEB

Vishay DaleIn Stock: 2681CMF5029K400FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF14FTC29K4 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 29.4 kOhms
• Tolerance: ±1%
• Composition: Metal Film
• Package type: Axial
• Temperature coefficient: ±50ppm/°C

Allowable Variation Parameters:

• Power rating: May be equal or higher than 0.25W
• Operating temperature range: May be equal or extended beyond -55°C ~ 155°C
• Physical dimensions: May vary within axial package constraints
• Additional features: Enhanced characteristics such as moisture resistance are permissible

The substitute parts CMF5529K400FHEB and CMF5029K400FHEB meet all mandatory matching criteria while offering enhanced specifications in operating temperature range and moisture resistance.

Parameter Comparison

Engineering Selection Recommendations

CMF5029K400FHEB (Manufacturer Recommended): This substitute maintains identical power rating (0.25W) and physical form factor compatibility with the RNF14FTC29K4 while providing extended operating temperature range (-55°C ~ 175°C) and moisture resistance. All parts are ROHS3 compliant and carry equivalent regulatory certifications. This option is recommended for direct replacement in existing designs.

CMF5529K400FHEB (Upgrade Option): This substitute doubles the power rating to 0.5W, providing increased thermal margin and design flexibility. It maintains all other critical electrical parameters and compliance certifications. Selection of this part is appropriate when circuit design permits higher power dissipation capability or when enhanced thermal performance is beneficial.

Both substitute parts are active products with substantial inventory availability (2793 and 2583 units respectively), ensuring supply chain reliability.

Frequently Asked Questions (FAQ)

Q: Can CMF5529K400FHEB replace RNF14FTC29K4 in my circuit? A: Yes. The CMF5529K400FHEB maintains identical resistance (29.4 kOhms), tolerance (±1%), temperature coefficient (±50ppm/°C), and axial package configuration. The increased power rating (0.5W vs 0.25W) is a non-limiting enhancement. Physical dimensions are comparable within axial package standards.

Q: What is the difference between CMF5029K400FHEB and CMF5529K400FHEB? A: Both parts are electrically identical to the RNF14FTC29K4 in resistance, tolerance, and temperature coefficient. The primary difference is power rating: CMF5029K400FHEB is rated 0.25W (matching the original), while CMF5529K400FHEB is rated 0.5W. CMF5029K400FHEB is the direct equivalent; CMF5529K400FHEB is an upgraded option.

Q: Are there packaging differences I should consider? A: The RNF14FTC29K4 is supplied in Tape & Reel (TR) packaging, while both substitute parts use Cut Tape (CT) packaging. Both are standard axial through-hole formats compatible with standard PCB assembly processes.

Q: Do the substitute parts meet the same compliance standards? A: Yes. All three parts are ROHS3 compliant, REACH unaffected, and carry identical ECCN (EAR99) and HTSUS classifications.

Q: Can I use CMF5029K400FHEB if my design requires higher temperature operation? A: CMF5029K400FHEB supports operating temperatures to 175°C, compared to 155°C for the RNF14FTC29K4. This extended range is compatible with designs requiring higher temperature performance.