RNF14FTC42K2 Equivalent & Substitute Parts

Part Overview

The RNF14FTC42K2 is a 42.2 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-grade construction, designed for applications requiring precision resistance values with reliable performance across industrial temperature ranges. The part is currently in active production status with 984 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design optimization when the primary part becomes unavailable or when application requirements necessitate alternative specifications.

Substiute Parts

RNF14FTC42K2

Stackpole Electronics IncIn Stock: 1020RNF14FTC42K2 Datasheet

Current PartRFQ

CMF5542K200FHEB

Vishay DaleIn Stock: 2448CMF5542K200FHEB Datasheet

UpgradeRFQ

CMF5042K200FHEB

Vishay DaleIn Stock: 1432CMF5042K200FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FTC42K2 are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Resistance value: 42.2 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Composition: Metal Film (exact match required)
• Temperature Coefficient: ±50ppm/°C (exact match required)
• Package Type: Axial (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)

Secondary Substitution Parameters (Allowable Variations):

• Power Rating: 0.25W or higher
• Operating Temperature Range: Must encompass or exceed -55°C ~ 155°C
• Manufacturer: Alternative qualified manufacturers permitted
• Packaging Format: Tape & Reel (TR) or Cut Tape (CT) acceptable
• Physical Dimensions: Minor variations acceptable within axial package constraints

Two substitute parts meet these criteria: CMF5542K200FHEB (0.5W upgrade) and CMF5042K200FHEB (direct 0.25W equivalent with enhanced features).

Parameter Comparison

Engineering Selection Recommendations

CMF5042K200FHEB (Manufacturer Recommended Equivalent): This Vishay Dale part provides direct electrical equivalence to the RNF14FTC42K2 with identical power rating (0.25W), resistance (42.2 kOhms), and tolerance (±1%). The CMF5042K200FHEB offers enhanced moisture resistance and extended operating temperature range (-55°C ~ 175°C), providing superior performance margins. Both parts maintain ROHS3 compliance and metal film construction. This substitute is suitable for direct replacement in existing designs without circuit modification.

CMF5542K200FHEB (Power Rating Upgrade): This Vishay Dale part maintains all critical electrical parameters (42.2 kOhms, ±1%, ±50ppm/°C) while providing doubled power dissipation capability (0.5W versus 0.25W). The CMF5542K200FHEB is applicable in applications where thermal margin improvement is beneficial or where circuit redesign permits higher power rating utilization. Extended operating temperature range (-55°C ~ 175°C) and moisture resistance features are included. Selection of this upgrade requires verification that circuit board layout and thermal management accommodate the slightly larger physical dimensions.

Both substitute parts are active production items from an established manufacturer with full compliance certifications and superior inventory availability compared to the primary part.

Frequently Asked Questions (FAQ)

Q: Can CMF5042K200FHEB be used as a direct drop-in replacement for RNF14FTC42K2? A: Yes. Both parts share identical electrical specifications (42.2 kOhms, ±1%, 0.25W, ±50ppm/°C) and axial package configuration. The CMF5042K200FHEB features enhanced moisture resistance and extended temperature range, making it functionally superior for direct substitution without circuit modification.

Q: What is the primary difference between CMF5542K200FHEB and CMF5042K200FHEB? A: The CMF5542K200FHEB provides 0.5W power rating compared to the 0.25W rating of CMF5042K200FHEB. All other electrical parameters remain identical. The higher power rating results in slightly larger physical dimensions (0.090" diameter versus 0.065" diameter).

Q: Are there packaging format compatibility considerations? A: The RNF14FTC42K2 is supplied in Tape & Reel (TR) format, while both substitute parts are supplied in Cut Tape (CT) format. Both formats are standard for through-hole axial resistors and are compatible with automated assembly equipment. Format selection depends on procurement and assembly process requirements.

Q: Do the substitute parts maintain the same temperature coefficient? A: Yes. All three parts (RNF14FTC42K2, CMF5542K200FHEB, and CMF5042K200FHEB) specify ±50ppm/°C temperature coefficient, ensuring consistent frequency stability and thermal performance characteristics across the operating temperature range.

Q: Are all parts RoHS compliant? A: Yes. The RNF14FTC42K2 and both substitute parts (CMF5542K200FHEB and CMF5042K200FHEB) are ROHS3 compliant, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

Q: Which substitute part should be selected for new designs? A: CMF5042K200FHEB is recommended for new designs as it provides direct electrical equivalence with enhanced moisture resistance and extended operating temperature range, offering superior performance margins without requiring circuit modification or increased thermal management considerations.