RNF14FAD27K4 Equivalent & Substitute Parts

Part Overview

The RNF14FAD27K4 is a 27.4 kOhms ±1% metal film through-hole resistor rated at 0.25W (1/4W) in axial package configuration, manufactured by Stackpole Electronics Inc. This component features flame retardant coating and safety-grade construction suitable for industrial and commercial applications. The part is currently active in production with 1112 pieces available in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design optimization across compatible electrical and mechanical specifications.

Substiute Parts

RNF14FAD27K4

Stackpole Electronics IncIn Stock: 1165RNF14FAD27K4 Datasheet

Current PartRFQ

RNF14FTD27K4

Stackpole Electronics IncIn Stock: 124190RNF14FTD27K4 Datasheet

DirectRFQ

CMF5527K400FHEB

Vishay DaleIn Stock: 7332CMF5527K400FHEB Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FAD27K4 are classified based on strict electrical and mechanical compatibility criteria:

Direct Equivalent (Same Specifications): RNF14FTD27K4 maintains identical electrical parameters: 27.4 kOhms resistance, ±1% tolerance, 0.25W power rating, ±100ppm/°C temperature coefficient, and -55°C ~ 155°C operating range. The only difference is packaging format (Cut Tape versus Tape & Box), which does not affect functional performance. This part is suitable for direct substitution in all applications.

Upgrade Substitute (Enhanced Specifications): CMF5527K400FHEB from Vishay Dale provides upgraded performance characteristics while maintaining core electrical compatibility. Key differences include increased power rating (0.5W versus 0.25W), improved temperature coefficient (±50ppm/°C versus ±100ppm/°C), extended maximum operating temperature (175°C versus 155°C), and additional moisture resistance feature. Resistance value (27.4 kOhms) and tolerance (±1%) remain identical. This part is suitable for applications requiring enhanced thermal performance or higher power dissipation margins.

Parameter Comparison

Engineering Selection Recommendations

RNF14FTD27K4 Selection Criteria: Select this direct equivalent when packaging format flexibility is required and inventory availability is a priority. With 124,149 pieces in stock, this part offers superior supply chain continuity. Electrical performance is identical to the main part, and ROHS3 compliance is maintained. This substitution is appropriate for standard applications without thermal or environmental constraints beyond the specified operating range.

CMF5527K400FHEB Selection Criteria: Select this upgrade substitute for applications requiring enhanced thermal stability or higher power dissipation capability. The improved temperature coefficient (±50ppm/°C) provides superior frequency stability and reduced drift over temperature variations. Extended operating temperature to 175°C accommodates high-temperature environments. Moisture resistance feature supports applications in humid or corrosive environments. ROHS3 compliance is maintained. The 0.5W power rating provides additional safety margin in circuits where thermal stress may occur.

Both substitute parts maintain ROHS3 compliance and are suitable for direct component selection based on application requirements and environmental conditions.

Frequently Asked Questions (FAQ)

Q: Can RNF14FTD27K4 be used as a direct replacement for RNF14FAD27K4? A: Yes. Both parts have identical electrical specifications: 27.4 kOhms resistance, ±1% tolerance, 0.25W power rating, ±100ppm/°C temperature coefficient, and -55°C ~ 155°C operating range. The difference in packaging format (Cut Tape versus Tape & Box) does not affect functional performance or circuit compatibility.

Q: What are the advantages of using CMF5527K400FHEB over the original part? A: CMF5527K400FHEB provides three key enhancements: (1) doubled power rating (0.5W versus 0.25W) for improved thermal margin, (2) superior temperature coefficient (±50ppm/°C versus ±100ppm/°C) for better frequency stability, and (3) extended maximum operating temperature (175°C versus 155°C) for high-temperature applications. Moisture resistance is an additional feature for harsh environments.

Q: Are all substitute parts ROHS3 compliant? A: Yes. RNF14FTD27K4 and CMF5527K400FHEB are both ROHS3 compliant, matching the compliance status of the main part RNF14FAD27K4.

Q: What is the physical size difference between substitute parts? A: RNF14FAD27K4 and RNF14FTD27K4 have identical dimensions: 0.093" Dia x 0.250" L (2.35mm x 6.35mm). CMF5527K400FHEB has slightly smaller dimensions: 0.090" Dia x 0.240" L (2.29mm x 6.10mm). Both are axial package configuration and are mechanically compatible in standard through-hole PCB layouts.

Q: Which substitute part should be selected for inventory optimization? A: RNF14FTD27K4 is recommended for inventory optimization due to significantly higher stock availability (124,149 pieces versus 1112 pieces for the main part). This part provides identical electrical performance with superior supply chain continuity.

Q: Can CMF5527K400FHEB be used in all applications where RNF14FAD27K4 is specified? A: CMF5527K400FHEB is suitable for all applications where RNF14FAD27K4 is specified, with the added benefit of enhanced thermal performance. The higher power rating and improved temperature coefficient make it suitable for demanding thermal environments. No circuit redesign is required for substitution.