CMF554K1380FKBF Equivalent & Substitute Parts

Part Overview

The CMF554K1380FKBF is a 4.138 kOhms ±1% metal film axial through-hole resistor rated at 0.5W (1/2W) manufactured by Vishay Dale. This component features flame retardant coating and moisture-resistant construction suitable for industrial and safety-critical applications. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility within specified electrical and mechanical parameters.

Substiute Parts

CMF554K1380FKBF

Vishay DaleIn Stock: 756CMF554K1380FKBF Datasheet

Current PartRFQ

CMF554K1200BHR6

Vishay DaleIn Stock: 1034CMF554K1200BHR6 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CMF554K1380FKBF is determined by the following critical parameters:

Electrical Compatibility Parameters:

• Resistance value within acceptable circuit tolerance
• Power rating equal to or greater than 0.5W
• Metal film composition for stability and noise characteristics
• Operating temperature range encompassing -55°C to 175°C minimum

Mechanical Compatibility Parameters:

• Axial package configuration for through-hole PCB mounting
• Physical dimensions 0.090" Dia x 0.240" L to ensure board layout compatibility
• Two terminations for standard axial lead configuration

Environmental & Safety Parameters:

• Flame retardant coating and moisture-resistant construction
• Equivalent safety feature set

The CMF554K1200BHR6 qualifies as a substitute based on matching all mechanical parameters, maintaining the required power rating, operating temperature range, and safety features. The resistance value of 4.12 kOhms represents a 0.43% deviation from the original 4.138 kOhms specification, which falls within acceptable circuit tolerance for most applications. The improved tolerance specification (±0.1% versus ±1%) and lower temperature coefficient (±50ppm/°C versus ±100ppm/°C) provide enhanced performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The CMF554K1200BHR6 is the manufacturer-recommended substitute for the obsolete CMF554K1380FKBF. Selection of this alternative is based on the following engineering criteria:

Product Status: The CMF554K1200BHR6 maintains active product status, ensuring continued availability and supply chain reliability compared to the obsolete CMF554K1380FKBF.

Electrical Performance: The substitute provides superior electrical characteristics with ±0.1% tolerance versus ±1% and a temperature coefficient of ±50ppm/°C versus ±100ppm/°C. These improvements enhance circuit stability and reduce drift over the operating temperature range.

Mechanical Compatibility: Identical axial package configuration and physical dimensions (0.090" Dia x 0.240" L) ensure direct board-level compatibility without PCB layout modifications.

Environmental & Safety Compliance: Both components share identical flame retardant coating, moisture-resistant construction, and safety features. Compliance status remains equivalent with respect to REACH and ECCN classifications.

Resistance Value Alignment: The 4.12 kOhms specification of the substitute represents a 0.43% deviation from the original 4.138 kOhms value. This variance is acceptable for circuit applications where the original ±1% tolerance was specified, as the substitute's tighter ±0.1% tolerance provides superior accuracy.

Frequently Asked Questions (FAQ)

Q: Can the CMF554K1200BHR6 be used as a direct replacement for the CMF554K1380FKBF?

A: Yes. Both components are Vishay Dale metal film axial resistors with identical power ratings (0.5W), operating temperature ranges (-55°C to 175°C), physical dimensions (0.090" Dia x 0.240" L), and safety features. The resistance value difference of 0.43% falls within acceptable circuit tolerance for applications originally specified with ±1% tolerance.

Q: What is the resistance value difference between these parts?

A: The CMF554K1380FKBF is rated at 4.138 kOhms while the CMF554K1200BHR6 is rated at 4.12 kOhms. This represents a 0.43% deviation. The substitute's ±0.1% tolerance provides tighter accuracy compared to the original part's ±1% tolerance.

Q: Are the physical dimensions identical?

A: Yes. Both components have identical axial package dimensions of 0.090" Dia x 0.240" L (2.29mm x 6.10mm), ensuring compatibility with existing PCB layouts and through-hole mounting patterns.

Q: What is the difference in packaging format?

A: The CMF554K1380FKBF is supplied in Bulk packaging, while the CMF554K1200BHR6 is supplied in Tape & Reel (TR) format. Tape & Reel packaging is standard for automated assembly processes and provides improved handling and storage characteristics.

Q: Do both parts have the same environmental and safety features?

A: Yes. Both components feature flame retardant coating, moisture-resistant construction, and identical safety characteristics. RoHS and REACH compliance status is equivalent for both parts.

Q: What is the temperature coefficient difference?

A: The CMF554K1380FKBF has a temperature coefficient of ±100ppm/°C, while the CMF554K1200BHR6 has ±50ppm/°C. The substitute exhibits half the temperature-induced resistance drift, providing improved stability across the -55°C to 175°C operating range.

Q: Why is the CMF554K1380FKBF classified as obsolete?

A: The CMF554K1380FKBF is no longer in active production. The CMF554K1200BHR6 represents the current active equivalent within the Vishay Dale CMF series, offering improved specifications and continued supply availability.