RNF12FTC2K49 Equivalent & Substitute Parts

Part Overview

The RNF12FTC2K49 is a 2.49 kOhm ±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-grade construction, designed for applications requiring precision resistance values with reliable performance across industrial temperature ranges. The part maintains Active product status with 1020 units in current inventory. Equivalent and substitute parts are identified to support procurement flexibility, design redundancy, and supply chain continuity.

Substiute Parts

RNF12FTC2K49

Stackpole Electronics IncIn Stock: 1086RNF12FTC2K49 Datasheet

Current PartRFQ

CMF552K4900FHEB

Vishay DaleIn Stock: 1552CMF552K4900FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF12FTC2K49 are qualified based on the following critical parameters:

• Resistance value: 2.49 kOhms (exact match required)
• Tolerance: ±1% (precision class equivalence)
• Power rating: 0.5W / 1/2W (functional equivalence)
• Composition: Metal Film (performance class equivalence)
• Package: Axial through-hole (mechanical and electrical compatibility)
• Temperature coefficient: ±50ppm/°C (stability equivalence)
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected (environmental standards)

The CMF552K4900FHEB from Vishay Dale meets all substitution criteria. Both parts share identical electrical specifications, composition, and compliance certifications. Mechanical dimensions differ slightly, but both conform to standard axial package geometry suitable for PCB mounting.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF12FTC2K49 and CMF552K4900FHEB are Active status components with full ROHS3 compliance and REACH unaffected certification, qualifying them for equivalent use in regulated applications. The CMF552K4900FHEB provides an extended operating temperature range (-55°C ~ 175°C versus -55°C ~ 155°C) and includes moisture-resistant features, offering enhanced environmental protection in humid or corrosive conditions. Selection between these parts should be based on procurement availability, packaging format requirements (Tape & Reel versus Cut Tape), and specific thermal operating conditions of the target application.

Frequently Asked Questions (FAQ)

Q: Can CMF552K4900FHEB replace RNF12FTC2K49 in existing designs?

A: Yes. Both parts share identical resistance, tolerance, power rating, temperature coefficient, and composition specifications. Axial package geometry is mechanically compatible for standard PCB through-hole mounting. Packaging format differs (Cut Tape versus Tape & Reel), which affects handling and assembly processes but not electrical performance.

Q: What is the significance of the extended temperature range in the CMF552K4900FHEB?

A: The CMF552K4900FHEB operates to 175°C maximum versus 155°C for the RNF12FTC2K49. This extended range provides design margin for applications with elevated ambient temperatures or thermal stress conditions. Both parts maintain ±50ppm/°C temperature coefficient within their respective operating ranges.

Q: Are there dimensional compatibility concerns between these parts?

A: The RNF12FTC2K49 measures 0.108" diameter × 0.344" length (2.75mm × 8.75mm). The CMF552K4900FHEB measures 0.090" diameter × 0.240" length (2.29mm × 6.10mm). Both conform to standard axial package geometry. PCB footprints designed for axial resistors accommodate both dimensions without modification.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both parts are ROHS3 Compliant and REACH Unaffected, meeting equivalent environmental and hazardous substance restrictions. ECCN and HTSUS classifications are identical (EAR99 and 8533.21.0090 respectively).

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel packaging supplies components on continuous carrier tape wound on reels, suitable for automated pick-and-place assembly. Cut Tape supplies components on tape segments, typically for manual assembly or lower-volume applications. Electrical and mechanical specifications are identical; packaging format affects procurement, storage, and assembly methodology only.