RN65C54R9FRE6 Equivalent & Substitute Parts

Part Overview

The RN65C54R9FRE6 is a 54.9 Ohm ±1% metal film through-hole resistor rated at 0.5W (1/2W) in axial package configuration. Manufactured by Vishay Dale under the Military MIL-R-10509/2 series, this component features flame retardant coating and moisture resistance suitable for military and high-reliability applications. The part is currently active in production with 905 pieces available in stock. Substitute parts may be required due to packaging format differences, inventory constraints, or application-specific compliance requirements.

Substiute Parts

RN65C54R9FRE6

Vishay DaleIn Stock: 990RN65C54R9FRE6 Datasheet

Current PartRFQ

CMF5549R900FHEB

Vishay DaleIn Stock: 4116CMF5549R900FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN65C54R9FRE6 is evaluated based on the following critical parameters:

• Resistance value and tolerance (54.9 Ohms ±1%)
• Power rating (0.5W minimum)
• Composition (Metal Film)
• Temperature coefficient (±50ppm/°C)
• Package configuration (Axial through-hole)
• Operating temperature range compatibility
• Electrical and mechanical safety features

The CMF5549R900FHEB is identified as a manufacturer-recommended substitute. While the resistance value differs slightly (49.9 Ohms versus 54.9 Ohms), both components share identical tolerance (±1%), power rating (0.5W), composition (Metal Film), temperature coefficient (±50ppm/°C), and axial package type. The substitute operates within a narrower temperature range (-55°C to 175°C versus -65°C to 175°C) and differs in packaging format (Cut Tape versus Tape & Reel).

Parameter Comparison

Engineering Selection Recommendations

The RN65C54R9FRE6 is the primary component for applications requiring military-grade specifications under MIL-R-10509/2 with extended low-temperature operation to -65°C. This part maintains RoHS non-compliant status consistent with military component standards.

The CMF5549R900FHEB substitute is suitable for applications where ROHS3 compliance and REACH unaffected status are required. The narrower operating temperature range (-55°C minimum) must be evaluated against application requirements. The resistance value difference (49.9 Ohms versus 54.9 Ohms) represents a 9% variance and must be assessed for circuit tolerance requirements. Both components share identical electrical characteristics in tolerance, power rating, temperature coefficient, and composition, supporting functional equivalence in circuits tolerant of the specified resistance variance and temperature range limitation.

Frequently Asked Questions (FAQ)

Q: Can CMF5549R900FHEB directly replace RN65C54R9FRE6 in all applications?

A: Direct replacement depends on circuit tolerance for the 9% resistance value difference (49.9 Ohms versus 54.9 Ohms) and the operating temperature range requirement. If the application operates above -55°C and circuit design accommodates the resistance variance, substitution is electrically feasible. Military applications requiring MIL-R-10509/2 compliance should retain the RN65C54R9FRE6.

Q: What is the significance of the packaging format difference?

A: RN65C54R9FRE6 is supplied in Tape & Reel format for automated assembly processes, while CMF5549R900FHEB is supplied in Cut Tape format. This affects procurement, handling, and assembly methodology but does not impact electrical performance or component functionality.

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

A: RN65C54R9FRE6 is specified for military applications with flame retardant coating and moisture resistance. CMF5549R900FHEB provides equivalent flame retardant and moisture-resistant features with improved RoHS and REACH compliance status, making it suitable for commercial high-reliability applications with environmental compliance requirements.

Q: How does the temperature coefficient affect substitution?

A: Both components share identical temperature coefficient (±50ppm/°C), ensuring equivalent thermal stability. The difference lies in the operating temperature range, where RN65C54R9FRE6 extends to -65°C while CMF5549R900FHEB operates from -55°C minimum.