RNF12FTC442R Equivalent & Substitute Parts

Part Overview

The RNF12FTC442R is a 442 Ohm ±1% metal film through-hole resistor rated at 0.5W (1/2W) with axial leads, manufactured by Stackpole Electronics Inc. This component features flame retardant coating and safety-grade construction, designed for applications requiring precision resistance in compact form factors. The part maintains Active product status with 807 units in current inventory. Substitute parts are identified when equivalent electrical specifications, mechanical compatibility, and regulatory compliance can be maintained across alternative manufacturers.

Substiute Parts

RNF12FTC442R

Stackpole Electronics IncIn Stock: 820RNF12FTC442R Datasheet

Current PartRFQ

CMF55442R00FHEB

Vishay DaleIn Stock: 4351CMF55442R00FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF12FTC442R is determined by the following critical parameters:

• Resistance value: 442 Ohms (exact match required)
• Tolerance: ±1% (equivalent or tighter tolerance acceptable)
• Power rating: 0.5W minimum (equal or higher acceptable)
• Composition: Metal Film (maintains electrical characteristics)
• Package: Axial through-hole (mechanical compatibility)
• Temperature coefficient: ±50ppm/°C or better
• Operating temperature range: Must support -55°C minimum; upper limit of 155°C or higher acceptable
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected

The CMF55442R00FHEB from Vishay Dale meets all substitution criteria with identical electrical specifications and enhanced operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

The CMF55442R00FHEB qualifies as a direct substitute for the RNF12FTC442R based on matching electrical specifications and regulatory compliance. Both components are ROHS3 Compliant and REACH Unaffected, meeting current environmental standards. The Vishay Dale substitute provides an extended operating temperature range (-55°C to 175°C versus -55°C to 155°C) and includes moisture-resistant features, offering equivalent or superior performance in equivalent applications. Physical dimensions differ slightly (0.090" Dia x 0.240" L for CMF55 versus 0.108" Dia x 0.344" L for RNF), which may affect board layout considerations in space-constrained designs.

Frequently Asked Questions (FAQ)

Q: Can the CMF55442R00FHEB replace the RNF12FTC442R in all applications?

A: Yes, provided the physical dimensions are compatible with your PCB layout. Both components share identical electrical specifications (442 Ohms ±1%, 0.5W, ±50ppm/°C) and meet the same regulatory requirements. The CMF55 is slightly smaller and offers extended temperature range capability.

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

A: The RNF12FTC442R measures 0.108" Dia x 0.344" L (2.75mm x 8.75mm). The CMF55442R00FHEB measures 0.090" Dia x 0.240" L (2.29mm x 6.10mm). The substitute is more compact in both diameter and length.

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

A: The RNF12FTC442R operates to 155°C maximum. The CMF55442R00FHEB extends to 175°C, providing additional thermal margin. Both maintain ±50ppm/°C temperature coefficient across their respective ranges.

Q: What packaging formats are available?

A: The RNF12FTC442R is supplied in Tape & Reel (TR) format. The CMF55442R00FHEB is supplied in Cut Tape (CT) format. Packaging selection depends on assembly process requirements.

Q: Do both parts meet current environmental compliance standards?

A: Yes. Both the RNF12FTC442R and CMF55442R00FHEB are ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements for electronic components.