RNF12FTC422K Equivalent & Substitute Parts

Part Overview

The RNF12FTC422K is a 422 kOhms ±1% 0.5W through-hole axial resistor manufactured by Stackpole Electronics Inc. This metal film resistor features flame retardant coating and safety construction, designed for applications requiring precision resistance values in compact axial packages. The part maintains Active product status with 949 units in current inventory. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when procurement requirements necessitate alternative manufacturers.

Substiute Parts

RNF12FTC422K

Stackpole Electronics IncIn Stock: 972RNF12FTC422K Datasheet

Current PartRFQ

CMF55422K00FHEB

Vishay DaleIn Stock: 1557CMF55422K00FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF12FTC422K is determined by the following critical parameters:

• Resistance value: 422 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.5W / 1/2W (exact match required)
• Composition: Metal Film (exact match required)
• Package: Axial through-hole (exact match required)
• Temperature coefficient: ±50ppm/°C (exact match required)
• Regulatory compliance: ROHS3 Compliant (minimum requirement)

The CMF55422K00FHEB from Vishay Dale meets all critical substitution criteria. Both parts share identical electrical specifications and axial package configuration. Dimensional differences exist due to manufacturing tolerances between manufacturers, but both conform to standard axial resistor form factors suitable for PCB assembly.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF12FTC422K and CMF55422K00FHEB are Active status components with full ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component procurement.

The CMF55422K00FHEB provides an extended operating temperature range to 175°C compared to the RNF12FTC422K at 155°C, offering additional thermal margin in high-temperature applications. The Vishay Dale part includes moisture resistant construction as an additional feature.

Dimensional differences between the two parts reflect standard manufacturing variations in axial resistor construction. The CMF55422K00FHEB is physically smaller, which may provide layout advantages in space-constrained designs. Both parts maintain identical electrical performance and are suitable for direct substitution in standard through-hole PCB applications.

Frequently Asked Questions (FAQ)

Q: Can the CMF55422K00FHEB replace the RNF12FTC422K in existing designs?

A: Yes. Both parts share identical electrical specifications: 422 kOhms ±1% at 0.5W with ±50ppm/°C temperature coefficient. The axial package configuration is compatible with standard through-hole PCB layouts. Dimensional differences do not affect electrical performance or standard PCB mounting.

Q: What are the key differences between these two parts?

A: The primary differences are manufacturer (Stackpole vs. Vishay Dale), physical dimensions, operating temperature range (155°C vs. 175°C), and packaging format (Tape & Reel vs. Cut Tape). The CMF55422K00FHEB includes moisture resistant construction. All electrical parameters remain identical.

Q: Are both parts compliant with current regulations?

A: Yes. Both the RNF12FTC422K and CMF55422K00FHEB are ROHS3 compliant and REACH unaffected, meeting current electronic component regulatory requirements.

Q: Does the smaller physical size of the CMF55422K00FHEB affect performance?

A: No. Physical dimensions do not affect electrical performance. The smaller size of the CMF55422K00FHEB may provide layout advantages in compact designs while maintaining identical resistance, tolerance, power rating, and temperature coefficient specifications.

Q: What packaging formats are available for each part?

A: The RNF12FTC422K is supplied in Tape & Reel (TR) format. The CMF55422K00FHEB is supplied in Cut Tape (CT) format. Both formats are standard for through-hole resistor distribution and are compatible with automated assembly equipment.