RNF12FTC3K48 Equivalent & Substitute Parts

Part Overview

The RNF12FTC3K48 is a 3.48 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-grade construction, designed for applications requiring precision resistance values with reliable performance across industrial temperature ranges. The part maintains Active product status with 770 pieces currently in stock. Substitute parts are identified to address inventory availability, lead time requirements, or specific application constraints while maintaining electrical and mechanical compatibility.

Substiute Parts

RNF12FTC3K48

Stackpole Electronics IncIn Stock: 842RNF12FTC3K48 Datasheet

Current PartRFQ

CMF553K4800FHEB

Vishay DaleIn Stock: 2704CMF553K4800FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The CMF553K4800FHEB from Vishay Dale qualifies as a direct substitute based on the following critical parameters:

• Identical resistance value: 3.48 kOhms
• Matching tolerance: ±1%
• Equivalent power rating: 0.5W (1/2W)
• Same composition: Metal Film
• Identical package configuration: Axial
• Matching temperature coefficient: ±50ppm/°C
• Compatible operating temperature range: -55°C to 175°C (exceeds minimum requirement)
• Equivalent features: Flame Retardant Coating, Safety
• Matching compliance: ROHS3 Compliant, REACH Unaffected

The substitute part maintains all critical electrical parameters and certifications required for direct replacement in the same application circuit.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF12FTC3K48 and CMF553K4800FHEB maintain Active product status and full ROHS3 compliance with REACH Unaffected designation. The CMF553K4800FHEB provides an extended operating temperature maximum of 175°C compared to 155°C for the RNF12FTC3K48, offering additional thermal margin in high-temperature applications. The Vishay Dale substitute includes moisture-resistant features, providing enhanced environmental protection. Packaging differs between Tape & Reel (TR) for the primary part and Cut Tape (CT) for the substitute, which may affect procurement and assembly processes. Selection between these parts should be based on inventory availability, packaging requirements, and thermal performance needs of the specific application.

Frequently Asked Questions (FAQ)

Q: Can CMF553K4800FHEB replace RNF12FTC3K48 in all applications?

A: Yes, the CMF553K4800FHEB meets all critical electrical parameters: identical 3.48 kOhms resistance, ±1% tolerance, 0.5W power rating, and ±50ppm/°C temperature coefficient. Both components are metal film axial resistors with flame retardant and safety features, maintaining ROHS3 compliance.

Q: What is the difference in physical dimensions?

A: The RNF12FTC3K48 measures 0.108" diameter × 0.344" length (2.75mm × 8.75mm). The CMF553K4800FHEB measures 0.090" diameter × 0.240" length (2.29mm × 6.10mm). The substitute is physically smaller, which may affect PCB layout and mechanical clearance considerations.

Q: Does the extended temperature range of CMF553K4800FHEB provide any advantage?

A: The CMF553K4800FHEB operates to 175°C maximum compared to 155°C for the RNF12FTC3K48. This 20°C additional margin may be beneficial in applications with elevated ambient temperatures or proximity to heat sources, though both parts meet standard industrial temperature requirements.

Q: Are there packaging implications when switching between these parts?

A: The RNF12FTC3K48 is supplied in Tape & Reel (TR) format, while the CMF553K4800FHEB is supplied in Cut Tape (CT) format. This affects bulk ordering, automated assembly compatibility, and storage considerations. Verify your assembly process requirements before substitution.

Q: Do both parts meet the same regulatory standards?

A: Yes, both the RNF12FTC3K48 and CMF553K4800FHEB are ROHS3 Compliant and REACH Unaffected, with identical ECCN (EAR99) and HTSUS (8533.21.0090) classifications.