CMF55191K00FKEB Equivalent & Substitute Parts

Part Overview

The CMF55191K00FKEB is a 191 kOhms ±1% metal film axial through-hole resistor rated at 0.5W (1/2W) manufactured by Vishay Dale. This component is classified as Active product status and features flame retardant coating with moisture resistance suitable for industrial and commercial applications. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical compatibility, and regulatory compliance to support procurement flexibility and supply chain continuity.

Substiute Parts

CMF55191K00FKEB

Vishay DaleIn Stock: 924CMF55191K00FKEB Datasheet

Current PartRFQ

CMF55191K00FHEB

Vishay DaleIn Stock: 1308CMF55191K00FHEB Datasheet

UpgradeRFQ

RNF12FTD191K

Stackpole Electronics IncIn Stock: 997RNF12FTD191K Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CMF55191K00FKEB are qualified based on the following criteria:

Electrical Parameters (Must Match):

• Resistance value: 191 kOhms
• Tolerance: ±1%
• Power rating: 0.5W (1/2W)
• Composition: Metal Film

Mechanical Parameters (Must Match):

• Package type: Axial through-hole
• Number of terminations: 2

Regulatory & Compliance Parameters (Must Match):

• RoHS3 Compliant status
• ECCN: EAR99
• HTSUS: 8533.21.0090

Allowable Variations:

• Packaging format (Tape & Reel vs. Cut Tape) does not affect electrical or mechanical compatibility
• Temperature coefficient variation within ±50ppm/°C to ±100ppm/°C is acceptable for this application class
• Operating temperature upper limit may vary (155°C to 175°C) provided minimum -55°C is maintained
• Physical dimensions may vary within standard axial resistor tolerances (diameter 0.090" to 0.108", length 0.240" to 0.344")

Parameter Comparison

Engineering Selection Recommendations

CMF55191K00FHEB (Upgrade Substitute): This part is a direct Vishay Dale equivalent with identical electrical and mechanical specifications. The primary difference is packaging format (Cut Tape vs. Tape & Reel) and improved temperature coefficient (±50ppm/°C vs. ±100ppm/°C). REACH Unaffected status provides regulatory advantage. Selection is appropriate for applications requiring tighter temperature stability or REACH compliance optimization.

RNF12FTD191K (MFR Recommended Substitute): This Stackpole Electronics part meets all core electrical and mechanical requirements with identical resistance, tolerance, and power rating. Physical dimensions are larger (0.108" Dia x 0.344" L vs. 0.090" Dia x 0.240" L), which may impact PCB layout compatibility. Operating temperature upper limit is 155°C (vs. 175°C for CMF series). REACH Unaffected status is maintained. Selection is appropriate when Stackpole supply chain is preferred or when PCB space constraints are not limiting.

Frequently Asked Questions (FAQ)

Q: Can CMF55191K00FHEB be used as a direct replacement for CMF55191K00FKEB?

A: Yes. Both parts are manufactured by Vishay Dale with identical electrical specifications (191 kOhms ±1%, 0.5W), identical physical dimensions, and identical operating temperature range (-55°C ~ 175°C). The only differences are packaging format (Cut Tape vs. Tape & Reel) and temperature coefficient (±50ppm/°C vs. ±100ppm/°C). Electrical and mechanical compatibility is confirmed.

Q: What are the physical dimension differences between CMF55191K00FKEB and RNF12FTD191K?

A: CMF55191K00FKEB measures 0.090" diameter × 0.240" length. RNF12FTD191K measures 0.108" diameter × 0.344" length. The Stackpole part is larger in both dimensions. PCB layout and component spacing must be evaluated before substitution.

Q: Does operating temperature range affect substitution eligibility?

A: Operating temperature range is a critical parameter. CMF55191K00FKEB and CMF55191K00FHEB both support -55°C ~ 175°C. RNF12FTD191K supports -55°C ~ 155°C. If the application requires operation above 155°C, RNF12FTD191K is not suitable. If maximum operating temperature is 155°C or below, all three parts are compatible.

Q: What is the significance of REACH Affected vs. REACH Unaffected status?

A: REACH Affected indicates the part may contain substances of concern under EU REACH regulations. REACH Unaffected indicates compliance without substance restrictions. CMF55191K00FKEB is REACH Affected; CMF55191K00FHEB and RNF12FTD191K are REACH Unaffected. Selection depends on regulatory requirements for the end application and target market.

Q: Are all three parts RoHS3 compliant?

A: Yes. CMF55191K00FKEB, CMF55191K00FHEB, and RNF12FTD191K are all ROHS3 Compliant, confirming lead-free and hazardous substance restrictions compliance.

Q: Does temperature coefficient affect circuit performance?

A: Temperature coefficient defines resistance change per degree Celsius. CMF55191K00FKEB and RNF12FTD191K have ±100ppm/°C; CMF55191K00FHEB has ±50ppm/°C. For precision analog circuits, lower temperature coefficient (±50ppm/°C) provides better stability across temperature extremes. For general-purpose applications, both coefficients are typically acceptable.