RNF12FTC5K49 Equivalent & Substitute Parts

Part Overview

The RNF12FTC5K49 is a 5.49 kOhms ±1% metal film axial through-hole resistor rated at 0.5W (1/2W) manufactured by Stackpole Electronics Inc. This component features flame retardant coating and safety-rated construction, designed for applications requiring precision resistance values with reliable performance across industrial temperature ranges. The part is currently Active in product status with 943 units in stock. Substitute parts are identified when equivalent electrical specifications, mechanical compatibility, and compliance certifications align with the original component requirements.

Substiute Parts

RNF12FTC5K49

Stackpole Electronics IncIn Stock: 1023RNF12FTC5K49 Datasheet

Current PartRFQ

CMF555K4900FHEB

Vishay DaleIn Stock: 3246CMF555K4900FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF12FTC5K49 is determined by the following critical parameters:

• Resistance value: 5.49 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)
• Compliance: ROHS3 Compliant, REACH Unaffected (exact match required)

The CMF555K4900FHEB from Vishay Dale meets all substitution criteria. Both components share identical electrical specifications, composition, and compliance certifications. Physical dimensions differ slightly due to manufacturing tolerances within the axial package category, but both maintain compatibility with standard through-hole PCB layouts.

Parameter Comparison

Engineering Selection Recommendations

The CMF555K4900FHEB qualifies as a direct substitute for the RNF12FTC5K49 based on matching electrical specifications, identical tolerance and power ratings, and equivalent compliance certifications. Both components are Active products with ROHS3 compliance and REACH Unaffected status, ensuring regulatory alignment for current manufacturing standards.

The CMF555K4900FHEB provides an extended operating temperature range (-55°C ~ 175°C versus -55°C ~ 155°C), offering additional thermal margin in high-temperature applications. The addition of moisture-resistant properties in the substitute part provides enhanced environmental protection without compromising electrical performance.

Packaging format differs between the two parts: the original uses Tape & Reel (TR) while the substitute uses Cut Tape (CT). This distinction affects procurement and assembly processes but does not impact electrical or mechanical compatibility in the final assembly.

Frequently Asked Questions (FAQ)

Q: Can the CMF555K4900FHEB replace the RNF12FTC5K49 in existing designs?

A: Yes. Both components share identical resistance values (5.49 kOhms), tolerance (±1%), power rating (0.5W), composition (metal film), and temperature coefficient (±50ppm/°C). Axial package compatibility ensures mechanical fit in standard through-hole PCB layouts.

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

A: The RNF12FTC5K49 measures 0.108" Dia x 0.344" L (2.75mm x 8.75mm). The CMF555K4900FHEB measures 0.090" Dia x 0.240" L (2.29mm x 6.10mm). Both are axial through-hole components; the dimensional variation reflects manufacturing differences between suppliers but does not affect PCB footprint compatibility.

Q: Are there compliance differences between the two parts?

A: No. Both components are ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements. ECCN and HTSUS classifications are identical.

Q: What is the significance of the moisture-resistant feature in the substitute part?

A: The CMF555K4900FHEB includes moisture-resistant properties as an additional feature. This does not alter electrical performance but provides enhanced environmental protection in humid or corrosive operating conditions.

Q: How do packaging formats affect component selection?

A: The RNF12FTC5K49 is supplied in Tape & Reel (TR) format, while the CMF555K4900FHEB is supplied in Cut Tape (CT) format. This affects procurement logistics and assembly line integration but does not impact electrical or mechanical compatibility. Component selection should consider manufacturing workflow requirements.

Q: What is the operating temperature range difference?

A: The RNF12FTC5K49 operates from -55°C to 155°C. The CMF555K4900FHEB operates from -55°C to 175°C. The substitute part supports a 20°C higher maximum temperature, providing additional thermal margin for high-temperature applications.