RNF14FAD39K2 Equivalent & Substitute Parts

Part Overview

The RNF14FAD39K2 is a 39.2 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 consumer electronics applications. The part is currently active in production with 1037 units in stock. Substitute parts are identified to address packaging format availability, inventory levels, and performance upgrade requirements while maintaining electrical compatibility.

Substiute Parts

RNF14FAD39K2

Stackpole Electronics IncIn Stock: 1143RNF14FAD39K2 Datasheet

Current PartRFQ

RNF14FTD39K2

Stackpole Electronics IncIn Stock: 21410RNF14FTD39K2 Datasheet

DirectRFQ

CMF5539K200FHEB

Vishay DaleIn Stock: 6970CMF5539K200FHEB Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FAD39K2 are classified based on the following substitution criteria:

Direct Equivalent (Packaging Variant): RNF14FTD39K2 maintains identical electrical specifications (39.2 kOhms ±1%, 0.25W, metal film, axial package) with the same manufacturer (Stackpole Electronics Inc) and series designation (RNF). The only difference is packaging format: Cut Tape (CT) versus Tape & Box (TB). This part is suitable for direct substitution in applications where tape packaging is acceptable.

Upgrade Substitute (Performance Enhancement): CMF5539K200FHEB from Vishay Dale provides the same resistance value and tolerance (39.2 kOhms ±1%) with enhanced specifications. The power rating increases from 0.25W to 0.5W (1/2W), operating temperature range extends to 175°C (versus 155°C), temperature coefficient improves to ±50ppm/°C (versus ±100ppm/°C), and moisture resistance is added. Physical dimensions are comparable (0.090" Dia x 0.240" L versus 0.093" Dia x 0.250" L). This part is suitable for applications requiring higher power dissipation capability or improved temperature stability.

Parameter Comparison

Engineering Selection Recommendations

RNF14FTD39K2 Selection: Choose this direct equivalent when packaging format flexibility is required and inventory availability is a priority. Both parts are manufactured by Stackpole Electronics Inc within the same RNF series, ensuring consistent quality and performance characteristics. The Cut Tape format provides higher stock availability (21328 units) compared to the main part. All compliance certifications (ROHS3, REACH Unaffected, EAR99) are identical.

CMF5539K200FHEB Selection: Choose this upgrade substitute when circuit design permits higher power dissipation or when enhanced temperature stability is required. The 0.5W rating provides additional thermal margin in applications approaching the 0.25W limit. The improved temperature coefficient (±50ppm/°C) and extended operating range to 175°C support applications in elevated temperature environments. Moisture resistance adds durability in humid or corrosive environments. Physical dimensions are compatible with standard axial component footprints. All regulatory compliance requirements are met.

Frequently Asked Questions (FAQ)

Q: Can RNF14FTD39K2 be used as a direct replacement for RNF14FAD39K2? A: Yes. Both parts have identical electrical specifications (39.2 kOhms ±1%, 0.25W, metal film, axial package) and are manufactured by Stackpole Electronics Inc. The only difference is packaging format (Cut Tape versus Tape & Box). Substitution is valid for all applications where the tape format is acceptable for assembly processes.

Q: What are the limitations when using CMF5539K200FHEB as a substitute? A: CMF5539K200FHEB is a different manufacturer (Vishay Dale versus Stackpole Electronics Inc) and series (CMF versus RNF). Physical dimensions are slightly smaller (0.090" Dia x 0.240" L versus 0.093" Dia x 0.250" L), which may require PCB footprint verification for tight spacing applications. The higher power rating (0.5W) and improved temperature coefficient are performance enhancements, not limitations.

Q: Are all substitute parts ROHS3 compliant? A: Yes. RNF14FTD39K2 and CMF5539K200FHEB are both ROHS3 compliant, matching the main part specification.

Q: Which substitute should be selected for high-temperature applications? A: CMF5539K200FHEB supports operating temperatures up to 175°C compared to 155°C for the main part and RNF14FTD39K2. This upgrade substitute is suitable for applications requiring extended temperature range operation.

Q: Are there any mechanical compatibility concerns with CMF5539K200FHEB? A: Physical dimensions are comparable and both parts use standard axial package configuration. Verify PCB footprint spacing for the slightly smaller diameter (0.090" versus 0.093") in designs with tight component density.