RNF12FTC18K7 Equivalent & Substitute Parts

Part Overview

The RNF12FTC18K7 is an 18.7 kOhms ±1% metal film through-hole resistor rated at 0.5W (1/2W) 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 provide alternative sourcing options while maintaining electrical and mechanical compatibility within the specified parameter tolerances.

Substiute Parts

RNF12FTC18K7

Stackpole Electronics IncIn Stock: 1144RNF12FTC18K7 Datasheet

Current PartRFQ

CMF5518K700FHEB

Vishay DaleIn Stock: 7114CMF5518K700FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF12FTC18K7 is determined by the following critical parameters:

• Resistance value: 18.7 kOhms (exact match required)
• Tolerance: ±1% (equal or tighter tolerance acceptable)
• Power rating: 0.5W minimum (equal or higher acceptable)
• Composition: Metal Film (required for performance characteristics)
• Package: Axial through-hole (mechanical compatibility)
• Temperature coefficient: ±50ppm/°C or better
• Operating temperature range: Must encompass or exceed -55°C ~ 155°C
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected

The CMF5518K700FHEB from Vishay Dale meets all substitution criteria with identical electrical specifications and enhanced operating temperature range (-55°C ~ 175°C).

Parameter Comparison

Engineering Selection Recommendations

Both the RNF12FTC18K7 and CMF5518K700FHEB are Active product status components with full ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for industrial and commercial applications.

The CMF5518K700FHEB provides an extended operating temperature range to 175°C compared to the 155°C maximum of the RNF12FTC18K7, with the addition of moisture-resistant properties. Both components maintain identical electrical performance within the specified tolerance and temperature coefficient parameters.

Selection between these parts should be based on application-specific requirements regarding maximum operating temperature and environmental exposure conditions.

Frequently Asked Questions (FAQ)

Q: Can CMF5518K700FHEB replace RNF12FTC18K7 in all applications?

A: Yes, provided the application does not require operation above 155°C. The CMF5518K700FHEB is electrically and mechanically compatible with identical resistance, tolerance, power rating, and temperature coefficient specifications.

Q: What is the difference in physical dimensions between these parts?

A: RNF12FTC18K7 measures 0.108" Dia x 0.344" L (2.75mm x 8.75mm). CMF5518K700FHEB measures 0.090" Dia x 0.240" L (2.29mm x 6.10mm). The CMF5518K700FHEB is physically smaller and may require PCB layout verification for mechanical fit.

Q: Are both parts suitable for high-reliability applications?

A: Both components feature flame retardant coating and safety characteristics. The CMF5518K700FHEB includes additional moisture-resistant properties. Both maintain ROHS3 compliance and REACH unaffected status.

Q: What packaging formats are available?

A: RNF12FTC18K7 is supplied in Tape & Reel (TR) format. CMF5518K700FHEB is supplied in Cut Tape (CT) format. Packaging selection should align with assembly process requirements.

Q: Do these parts have identical temperature coefficients?

A: Yes, both components specify ±50ppm/°C temperature coefficient, ensuring equivalent frequency stability and thermal performance characteristics.