CMF55178K00FKBF Equivalent & Substitute Parts

Part Overview

The CMF55178K00FKBF is a 178 kOhms ±1% metal film through-hole resistor rated at 0.5W (1/2W) in axial package configuration. Manufactured by Vishay Dale, this component features flame retardant coating and moisture-resistant properties suitable for industrial and commercial applications. The part is currently active in production. Substitute parts may be required due to packaging format availability, compliance requirements, or inventory constraints across different distribution channels.

Substiute Parts

CMF55178K00FKBF

Vishay DaleIn Stock: 1280CMF55178K00FKBF Datasheet

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CMF55178K00FHEB

Vishay DaleIn Stock: 1051CMF55178K00FHEB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution between CMF55178K00FKBF and CMF55178K00FHEB is valid based on the following electrical and mechanical parameters:

• Identical resistance value: 178 kOhms
• Identical tolerance: ±1%
• Identical power rating: 0.5W (1/2W)
• Identical composition: Metal Film
• Identical package type: Axial
• Identical physical dimensions: 0.090" Dia x 0.240" L (2.29mm x 6.10mm)
• Identical operating temperature range: -55°C to 175°C
• Identical number of terminations: 2
• Same base product series: CMF55

The primary differences between these parts are packaging format (Bulk versus Cut Tape) and temperature coefficient specification, neither of which affects functional interchangeability in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both CMF55178K00FKBF and CMF55178K00FHEB are functionally equivalent for circuit applications requiring 178 kOhms ±1% metal film resistors at 0.5W power rating. Selection between these parts should be based on:

1. Packaging requirements: CMF55178K00FKBF is supplied in Bulk format, while CMF55178K00FHEB is supplied in Cut Tape (CT) format. Choose based on assembly process and inventory management needs.

2. Compliance requirements: CMF55178K00FHEB carries ROHS3 compliance certification, while CMF55178K00FKBF is RoHS non-compliant. Applications subject to RoHS regulations must use CMF55178K00FHEB.

3. Temperature coefficient: CMF55178K00FHEB offers superior temperature stability at ±50ppm/°C compared to CMF55178K00FKBF at ±100ppm/°C. Applications requiring tighter temperature coefficient performance should specify CMF55178K00FHEB.

Frequently Asked Questions (FAQ)

Q: Can CMF55178K00FKBF be replaced with CMF55178K00FHEB in existing designs?

A: Yes. Both parts share identical electrical specifications (178 kOhms ±1%, 0.5W metal film) and physical dimensions (0.090" Dia x 0.240" L). They are mechanically and electrically interchangeable in axial through-hole applications.

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

A: Bulk packaging supplies loose components suitable for manual assembly or bulk handling. Cut Tape (CT) packaging supplies components on continuous tape, optimized for automated pick-and-place assembly equipment. The components themselves are identical.

Q: Why does CMF55178K00FHEB have a lower temperature coefficient?

A: Temperature coefficient (±50ppm/°C versus ±100ppm/°C) indicates the rate of resistance change across the operating temperature range. CMF55178K00FHEB provides tighter tolerance stability over temperature variations, beneficial for precision applications.

Q: Which part should be selected for RoHS-regulated applications?

A: CMF55178K00FHEB is ROHS3 compliant and must be used for applications subject to RoHS directives. CMF55178K00FKBF is RoHS non-compliant and cannot be used in regulated environments.

Q: Are the physical dimensions identical between both parts?

A: Yes. Both parts measure 0.090" diameter by 0.240" length (2.29mm x 6.10mm) and mount identically on PCBs with standard 0.1" pitch through-hole spacing.