RNF14FTC3K74 Equivalent & Substitute Parts

Part Overview

The RNF14FTC3K74 is a 3.74 kOhms ±1% metal film through-hole resistor rated at 0.25W (1/4W) in axial package configuration, manufactured by Stackpole Electronics Inc. This component is classified as Active product status with flame retardant coating and safety features suitable for industrial and commercial applications. Substitute parts are identified to address inventory availability, enhanced tolerance specifications, or increased power ratings while maintaining electrical and mechanical compatibility within the RNF series and equivalent cross-manufacturer alternatives.

Substiute Parts

RNF14FTC3K74

Stackpole Electronics IncIn Stock: 1148RNF14FTC3K74 Datasheet

Current PartRFQ

RNF14BTC3K74

Stackpole Electronics IncIn Stock: 4845RNF14BTC3K74 Datasheet

UpgradeRFQ

CMF553K7400FHEB

Vishay DaleIn Stock: 5328CMF553K7400FHEB Datasheet

UpgradeRFQ

CMF503K7400FHEB

Vishay DaleIn Stock: 2316CMF503K7400FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for RNF14FTC3K74 are categorized based on the following substitution criteria:

Primary Substitution Parameters:

• Resistance value: 3.74 kOhms (exact match required)
• Composition: Metal Film (maintained across all substitutes)
• Package: Axial configuration (maintained across all substitutes)
• Temperature Coefficient: ±50ppm/°C (maintained across all substitutes)
• RoHS Compliance: ROHS3 Compliant (maintained across all substitutes)

Allowable Variations:

• Tolerance: May be tightened from ±1% to ±0.1% (upgrade)
• Power Rating: May be increased from 0.25W to 0.5W (upgrade)
• Packaging Format: Tape & Reel (TR) to Cut Tape (CT) conversion acceptable
• Operating Temperature Range: May be extended (e.g., -55°C ~ 175°C)
• Manufacturer: Cross-manufacturer substitution permitted (Stackpole Electronics Inc to Vishay Dale)

Parameter Comparison

Engineering Selection Recommendations

RNF14BTC3K74 (Stackpole Electronics Inc): Direct same-manufacturer upgrade within the RNF series. Provides tightened tolerance specification (±0.1% versus ±1%) while maintaining identical power rating, operating temperature range, and physical dimensions. Suitable for applications requiring improved accuracy. ROHS3 compliant. Higher inventory availability (4828 Pcs).

CMF503K7400FHEB (Vishay Dale): Manufacturer-recommended substitute. Maintains original tolerance (±1%) and power rating (0.25W) with extended operating temperature range (-55°C ~ 175°C). Introduces moisture-resistant feature. Smaller physical dimensions (0.065" Dia x 0.150" L versus 0.093" Dia x 0.250" L). ROHS3 compliant. Suitable for space-constrained applications.

CMF553K7400FHEB (Vishay Dale): Upgrade substitute with increased power rating (0.5W versus 0.25W). Maintains tolerance (±1%) and introduces moisture-resistant feature. Extended operating temperature range (-55°C ~ 175°C). Slightly smaller physical dimensions (0.090" Dia x 0.240" L). ROHS3 compliant. Highest inventory availability (5274 Pcs). Suitable for applications requiring higher power dissipation capability.

All substitute parts maintain ROHS3 compliance and are classified as Active product status.

Frequently Asked Questions (FAQ)

Q: Can RNF14BTC3K74 be used as a direct replacement for RNF14FTC3K74?

A: Yes. Both parts are manufactured by Stackpole Electronics Inc within the RNF series, share identical resistance (3.74 kOhms), power rating (0.25W), operating temperature range (-55°C ~ 155°C), and axial package configuration. RNF14BTC3K74 provides improved tolerance (±0.1% versus ±1%). The primary difference is packaging format (Cut Tape versus Tape & Reel).

Q: What are the physical dimension differences between substitute parts?

A: RNF14FTC3K74 and RNF14BTC3K74 share identical dimensions (0.093" Dia x 0.250" L). CMF503K7400FHEB is smaller (0.065" Dia x 0.150" L). CMF553K7400FHEB is intermediate (0.090" Dia x 0.240" L). Smaller dimensions may affect PCB layout and mechanical clearance considerations.

Q: Is CMF553K7400FHEB suitable for applications designed for 0.25W resistors?

A: Yes. CMF553K7400FHEB is rated at 0.5W, which exceeds the 0.25W requirement. Higher power rating provides additional thermal margin and does not create incompatibility. The component will operate safely in circuits designed for lower power dissipation.

Q: What is the significance of the moisture-resistant feature in Vishay Dale substitutes?

A: CMF503K7400FHEB and CMF553K7400FHEB include moisture-resistant coating. This feature provides enhanced environmental protection in humid or corrosive conditions. It is not required for direct substitution but may be beneficial in specific application environments.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. RNF14FTC3K74, RNF14BTC3K74, CMF503K7400FHEB, and CMF553K7400FHEB are all ROHS3 compliant. CMF503K7400FHEB is noted as REACH Affected; CMF553K7400FHEB and RNF14FTC3K74 are REACH Unaffected.

Q: Can packaging format (Tape & Reel versus Cut Tape) affect component functionality?

A: No. Packaging format affects handling, storage, and assembly processes only. Electrical and mechanical performance remain identical. Format selection depends on manufacturing equipment and assembly requirements.