CMF555K3000FKBF Equivalent & Substitute Parts

Part Overview

The CMF555K3000FKBF is a 5.3 kOhms ±1% metal film through-hole resistor rated at 0.5W (1/2W) in axial package configuration. This component features flame retardant coating and moisture-resistant construction suitable for industrial and commercial applications. The part is classified as obsolete, necessitating identification of active equivalent alternatives for ongoing procurement and design continuity.

Substiute Parts

CMF555K3000FKBF

Vishay DaleIn Stock: 1001CMF555K3000FKBF Datasheet

Current PartRFQ

CMF555K3000BER6

Vishay DaleIn Stock: 2073CMF555K3000BER6 Datasheet

UpgradeRFQ

CMF555K3000FKEK

Vishay DaleIn Stock: 1169CMF555K3000FKEK Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CMF555K3000FKBF is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Parameters:

• Resistance value: 5.3 kOhms
• Power rating: 0.5W (1/2W)
• Package type: Axial through-hole
• Physical dimensions: 0.090" Dia x 0.240" L
• Composition: Metal Film
• Operating temperature range: -55°C ~ 175°C
• Number of terminations: 2

Allowable Variation Parameters:

• Tolerance: ±1% or tighter (±0.1%)
• Temperature coefficient: ±100ppm/°C or tighter (±25ppm/°C)
• Packaging format: Bulk or Cut Tape
• Product status: Active preferred over obsolete
• RoHS compliance: Compliant or non-compliant

Substitute parts must maintain identical resistance, power rating, package configuration, and physical dimensions. Improvements in tolerance and temperature coefficient are acceptable. Packaging format and compliance status do not restrict substitution eligibility.

Parameter Comparison

Engineering Selection Recommendations

CMF555K3000BER6 (Upgrade Substitute)

This part provides superior performance characteristics with tighter tolerance (±0.1% versus ±1%) and improved temperature coefficient (±25ppm/°C versus ±100ppm/°C). The CMF555K3000BER6 maintains active product status and is available in Cut Tape packaging. Selection of this upgrade is appropriate for applications requiring enhanced precision and stability. RoHS non-compliance status is identical to the main part.

CMF555K3000FKEK (Parametric Equivalent)

This part maintains identical electrical specifications (±1% tolerance, ±100ppm/°C temperature coefficient) and is available in Bulk packaging matching the original format. The CMF555K3000FKEK holds active product status and achieves RoHS3 compliance, providing regulatory advantage over the obsolete main part. This substitute is suitable for direct replacement in applications where the original specifications are required without performance enhancement.

Both substitute parts are manufactured by Vishay Dale and share identical mechanical compatibility, physical dimensions, and thermal operating range with the CMF555K3000FKBF.

Frequently Asked Questions (FAQ)

Q: Can CMF555K3000BER6 be used as a direct replacement for CMF555K3000FKBF?

A: Yes. The CMF555K3000BER6 is electrically and mechanically compatible. It provides improved tolerance (±0.1%) and temperature coefficient (±25ppm/°C) performance while maintaining identical resistance, power rating, package type, and physical dimensions. The tighter specifications represent an upgrade path suitable for applications where enhanced precision is beneficial or required.

Q: What is the difference between CMF555K3000BER6 and CMF555K3000FKEK?

A: Both parts are active substitutes with identical resistance (5.3 kOhms) and power rating (0.5W). The CMF555K3000BER6 offers superior tolerance (±0.1% versus ±1%) and temperature coefficient (±25ppm/°C versus ±100ppm/°C) but is supplied in Cut Tape packaging. The CMF555K3000FKEK maintains the original ±1% tolerance and ±100ppm/°C temperature coefficient in Bulk packaging and achieves RoHS3 compliance. Selection depends on application precision requirements and packaging preferences.

Q: Are the physical dimensions identical across all three parts?

A: Yes. All three parts share identical physical dimensions of 0.090" Dia x 0.240" L (2.29mm x 6.10mm) in axial package configuration. They are mechanically interchangeable on printed circuit boards without modification to component placement or board layout.

Q: Does packaging format affect electrical performance?

A: No. Packaging format (Bulk versus Cut Tape) does not affect electrical performance or component specifications. The choice between Bulk and Cut Tape packaging is determined by procurement, handling, and assembly process requirements rather than electrical compatibility.

Q: Why is RoHS compliance status different between the substitutes?

A: RoHS compliance status reflects manufacturing process and material composition changes implemented by the manufacturer at different production dates. The CMF555K3000FKEK achieves RoHS3 compliance while maintaining identical electrical specifications to the original part. The CMF555K3000BER6 retains non-compliant status despite superior electrical performance. Compliance requirements should be evaluated based on application and regulatory jurisdiction.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. All three parts maintain identical resistance value, power rating, package type, and physical dimensions. Designs utilizing the CMF555K3000FKBF can incorporate either CMF555K3000BER6 or CMF555K3000FKEK without circuit modification. The choice between substitutes depends on precision requirements, packaging preferences, and compliance specifications for the target application.