RNF12FTC54R9 Equivalent & Substitute Parts

Part Overview

The RNF12FTC54R9 is a 54.9 Ohm ±1% metal film through-hole resistor rated at 0.5W (1/2W) in axial package configuration, manufactured by Stackpole Electronics Inc. This component is part of the active RNF series and features flame retardant coating with safety-rated construction. The part is ROHS3 compliant and currently in stock with 1060 units available. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the allowed parameter range.

Substiute Parts

RNF12FTC54R9

Stackpole Electronics IncIn Stock: 1161RNF12FTC54R9 Datasheet

Current PartRFQ

CMF5554R900FHEB

Vishay DaleIn Stock: 1449CMF5554R900FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF12FTC54R9 is determined by strict equivalence across the following critical parameters:

• Resistance value: 54.9 Ohms (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 (minimum requirement)

The CMF5554R900FHEB from Vishay Dale meets all substitution criteria with identical electrical specifications and compatible mechanical dimensions within the axial package standard.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF12FTC54R9 and CMF5554R900FHEB are active products with ROHS3 compliance and REACH unaffected status. The CMF5554R900FHEB provides an extended operating temperature range to 175°C compared to 155°C for the RNF12FTC54R9, and includes moisture resistant features. Both components are classified under ECCN EAR99 and HTSUS 8533.21.0090. Selection between these parts depends on packaging requirements (Tape & Reel versus Cut Tape) and application temperature environment. The CMF5554R900FHEB is suitable for applications requiring enhanced moisture resistance or operation at elevated temperatures within the extended range.

Frequently Asked Questions (FAQ)

Q: Can the CMF5554R900FHEB replace the RNF12FTC54R9 in all applications?

A: Yes, the CMF5554R900FHEB meets all electrical and mechanical substitution criteria. The extended operating temperature range (to 175°C) and moisture resistant features provide equivalent or enhanced performance for standard applications rated to 155°C.

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

A: Tape & Reel (TR) packaging is supplied on continuous carrier tape wound on reels for automated assembly processes. Cut Tape (CT) packaging is supplied as individual segments cut from the carrier tape, suitable for manual assembly or smaller volume applications. Both formats contain identical components.

Q: Are the physical dimensions compatible between these parts?

A: Both parts are axial through-hole resistors with standard lead spacing. The RNF12FTC54R9 has dimensions of 0.108" Dia x 0.344" L (2.75mm x 8.75mm), while the CMF5554R900FHEB is 0.090" Dia x 0.240" L (2.29mm x 6.10mm). Both fit standard 0.1" pitch PCB hole spacing used for axial components.

Q: Do both parts meet the same compliance standards?

A: Yes, both the RNF12FTC54R9 and CMF5554R900FHEB are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes.