CMF558K2500FKBF Equivalent & Substitute Parts

Part Overview

The CMF558K2500FKBF is an 8.25 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 maintains active product status with 850 units in current inventory. Substitute parts are identified when identical electrical specifications and mechanical compatibility are maintained across alternative packaging or compliance variants within the same product series.

Substiute Parts

CMF558K2500FKBF

Vishay DaleIn Stock: 912CMF558K2500FKBF Datasheet

Current PartRFQ

CMF558K2500FKEK

Vishay DaleIn Stock: 1020CMF558K2500FKEK Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CMF558K2500FKBF is determined by strict equivalence across the following parameters:

• Resistance value: 8.25 kOhms
• Tolerance: ±1%
• Power rating: 0.5W (1/2W)
• Composition: Metal Film
• Package: Axial through-hole
• Temperature coefficient: ±100ppm/°C
• Operating temperature range: -55°C to 175°C
• Physical dimensions: 0.090" Dia x 0.240" L
• Manufacturer series: CMF (Vishay Dale)

The identified substitute CMF558K2500FKEK maintains complete parametric equivalence across all electrical and mechanical specifications. Differentiation between the main part and substitute is limited to packaging variant designation and regulatory compliance status.

Parameter Comparison

Engineering Selection Recommendations

Both CMF558K2500FKBF and CMF558K2500FKEK are functionally equivalent for circuit applications requiring 8.25 kOhms ±1% metal film resistors in axial configuration. Selection between these parts should be based on regulatory compliance requirements:

The CMF558K2500FKBF is designated as RoHS non-compliant and is suitable for applications where RoHS compliance is not mandated.

The CMF558K2500FKEK is RoHS3 compliant and is required for applications subject to RoHS Directive 2011/65/EU or equivalent regional regulations. Both parts maintain REACH Affected status and EAR99 export classification.

Inventory availability shows 921 units of CMF558K2500FKEK against 850 units of CMF558K2500FKBF, with both parts actively manufactured and distributed.

Frequently Asked Questions (FAQ)

Q: Can CMF558K2500FKEK replace CMF558K2500FKBF in existing designs?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters including resistance, tolerance, power rating, temperature coefficient, and physical dimensions. The primary difference is RoHS3 compliance status of the substitute part.

Q: What is the difference between the two part numbers?

A: The parts differ only in packaging variant designation (FKBF versus FKEK) and regulatory compliance. The FKEK variant is RoHS3 compliant while the FKBF is non-compliant. All electrical and mechanical specifications remain identical.

Q: Are these parts interchangeable on PCBs?

A: Yes. Both parts use identical axial through-hole package configuration with matching physical dimensions (0.090" Dia x 0.240" L). No PCB layout modifications are required for substitution.

Q: Which part should be selected for new designs?

A: Selection depends on regulatory requirements. For applications requiring RoHS compliance, specify CMF558K2500FKEK. For applications without RoHS mandates, either part is acceptable based on availability and cost considerations.

Q: What is the operating temperature range for both parts?

A: Both CMF558K2500FKBF and CMF558K2500FKEK operate across -55°C to 175°C with a temperature coefficient of ±100ppm/°C.