CMF558R0000FKBF Equivalent & Substitute Parts

Part Overview

The CMF558R0000FKBF is an 8 Ohm, 1/2W metal film through-hole resistor manufactured by Vishay Dale. This axial component features flame retardant coating and moisture resistance, designed for applications requiring precision resistive elements in electronic circuits. The part maintains Active product status and is currently in stock with 1007 units available. Substitute parts are identified to address inventory availability, compliance requirements, or specific application needs while maintaining electrical and mechanical compatibility.

Substiute Parts

CMF558R0000FKBF

Vishay DaleIn Stock: 1108CMF558R0000FKBF Datasheet

Current PartRFQ

CMF558R0000FKEK

Vishay DaleIn Stock: 5814CMF558R0000FKEK Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CMF558R0000FKBF is determined by strict equivalence across the following parameters:

• Resistance value: 8 Ohms
• Tolerance: ±1%
• Power rating: 0.5W (1/2W)
• Composition: Metal Film
• Temperature coefficient: ±100ppm/°C
• Operating temperature range: -55°C to 175°C
• Package type: Axial
• Physical dimensions: 0.090" Dia × 0.240" L (2.29mm × 6.10mm)
• Number of terminations: 2
• Features: Flame Retardant Coating, Moisture Resistant, Safety

The CMF558R0000FKEK meets all electrical and mechanical parameters required for direct substitution. Both parts belong to the CMF series and share identical base specifications, enabling interchangeability in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the CMF558R0000FKBF and CMF558R0000FKEK are electrically and mechanically equivalent and maintain Active product status. Selection between these parts should be based on compliance and regulatory requirements:

The CMF558R0000FKEK is ROHS3 compliant and REACH unaffected, making it suitable for applications subject to European Union environmental directives and RoHS regulations. The CMF558R0000FKBF is RoHS non-compliant and REACH affected, appropriate for applications without such regulatory constraints.

Inventory availability differs significantly, with the CMF558R0000FKEK offering substantially higher stock levels (5748 units versus 1007 units). Both parts share identical ECCN and HTSUS classifications.

Frequently Asked Questions (FAQ)

Q: Are CMF558R0000FKBF and CMF558R0000FKEK electrically interchangeable?

A: Yes. Both parts are 8 Ohm, ±1%, 1/2W metal film axial resistors with identical temperature coefficients (-55°C to 175°C operating range) and physical dimensions (0.090" Dia × 0.240" L). They are direct electrical substitutes.

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

A: The CMF558R0000FKEK is ROHS3 compliant and REACH unaffected, while the CMF558R0000FKBF is RoHS non-compliant and REACH affected. Electrical and mechanical specifications are identical.

Q: Can I use CMF558R0000FKEK in place of CMF558R0000FKBF in existing designs?

A: Yes, provided your application does not have specific compliance restrictions that require the non-compliant variant. The CMF558R0000FKEK is the preferred choice for new designs and applications subject to RoHS or REACH regulations.

Q: Are the physical dimensions identical for both parts?

A: Yes. Both parts measure 0.090" diameter by 0.240" length (2.29mm × 6.10mm) and use identical axial packaging with 2 terminations.

Q: Which part should I select for inventory planning?

A: The CMF558R0000FKEK offers significantly higher current stock availability (5748 units) compared to the CMF558R0000FKBF (1007 units), making it the preferred choice for applications without specific compliance constraints.